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2023 Jul-Dec______2023 Jan-Jun______2022 Jul-Dec______2022 Jan-Jun
jOrgan website for new users___Sticky Post
Piston indicator lights and launchpad support Newest post on 2026-04-25 3 replies AI (off-topic) Most recent post on 2026-04-19 1 reply Looped Modulation in Fluidsynth reverb By JohnBeach Most recent post on 2026-04-19 1 reply Traps control By phil Most recent post on 2026-04-14
SAM on my Wyvern 4 manual jOrgan____By Stephen Rowley____Most recent post on 2026-04-11____13 replies
Reverb for jOrgan By John Beach Most recent post on 2026-03-19 6 replies Save As By JohnR__Most recent post on 2026-02-21___43 replies full screen not full screen__ By Paul StringfellowByMost recent post on 2026-02-21___48 replies Seasons Greetings____By JohnR__Most recent post on 2026-01-12___44 replies SF2 Player plugin____By Dr. Mark Bugeja MD__Most recent post on 2026-01-06___42 replies
From JohnR
This website has been created to make it easier for internet users to discover jOrgan and to start
using it. Its main pages are HOME, STARTING, ADDING, GALLERY, F.A.Q., THIS SITE and CONTACT.
The web address is https://jorgan.info
JohnR
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Fluidsynth Reverb
Fluidsynth Reverb
From John Beach on 2025-08-24 22:41
Recently, I experimented with Fluidsynth Reverb elements Room, Width, Damping and Level. As we know,
with the setting of each individual element, the "whole" of the sound-effect equals the sum of those
settings. Level has always produced a frequential looped effect relative to its graduated increase,
above approximately 0.15. + or -. Level, unfortunately, has the effect of muffling sound, the lower
the setting is. This is unrealistic as compared with an acoustic environment where softness and
loudness do not impact the reverberative space, or tone quality is not changed by that space.
The interrelationship of the elements of Fluidsynth reverb is such that the audio waves of the
engaged stops being played are manipulated in the "field effect" created by the parameters of reverb
as space size. Level is not realistic. It is comparable to degree of "on" and "off."
Using the green light, slider elements on the "Skin" tab in jOrgan construct mode, I
tried settings of "Room"=4 (green lights lit), Width=3, Damping=2, and Level=8
I got a realistic fullness of audio without the frequential loop effect. The sound was satisfying,
but a relative,acoustic- space size was not really discernible.
I believe the solution to this problem in jOrgan is to have soundfonts made from actual sample sets
of recorded stops from real pipes, like Hauptwerk has.
In such a case, the reverb elements can be avoided completely.
John Beach
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END OF THREAD
Seasons Greetings
Seasons Greetings
From JohnR on 2025-12-31 2025 at 21:41
A Merry Christmas and a Happy New Year to all!
JohnR
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From John Beach on 2025-12-31 at 00:27 AM
Indeed, a Merry Christmas and Happy New Year!
John Beach
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From Dr. Mark Bugeja MD on 2025-12-31 at 01:33 AM
A Blessed Christmas to all and best wishes for the New Year.
Mark Bugeja from Malta.
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From Peter Hanlon on 2025-12-31 at 02:10 PM
A Happy New Year to the jOrgan Community.
Has anyone tried to run jOrgan on an Arduino UNO Q yet?
It might have appeal for those of us who try to manage hardware like keyboards etc with
an Arduino sketch and then pass it to a Raspberry PI running jOrgan. It potentially gets
everything back in the one box.
From PeterH
______________________________________________________________________________________________________________
POST
From JohnR on 2026-01-12 at 22.15
On Fri Jan 02 2026 Peter Hanlon wrote: "A Happy New Year to the jOrgan Community. Has anyone
tried to run jOrgan on an Arduino UNO Q yet?"
Thank you, Peter, and a Happy New Year to you!
No answer to your question probably means that the answer is, "No". The "Organ Forum" certainly
provides a lot of guidance for people who use a standard Arduino instead of a commercially-
produced encoder, but I don't recall many jOrgan users who have indicated that they have used
it for that, let alone the latest very recent release. You have been quick off the mark. ;-)
This latest Arduino differs from previous ones in that it includes a microprocessor on the one
board. Its OS is a form of Debian Linux, so the standard Linux version of jOrgan will perhaps
run on it with no problems. However, it seems to have a RAM of only 785 Kbites (from memory)
and I do think that this would be somewhat limiting for dispositions which use a soundfont that
is larger than about 200MB. You would find that it would allow only a small number of stops to
be active at the one time. I base this on my experience using an RPi 3B, which has a RAM of 1 GB.
There are certainly some jOrgan dispositions which I cannot run on my home console because of RAM
limitations.
Best wishes,
JohnR
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END OF THREAD
Reverb for jOrgan
Reverb for jOrgan
From John Beach on 2026-01-04 at 01:52
I know very little about programming, so my question reflects that ignorance.
Would it be difficult to add a "host" capability for reverb plug-ins, such as Convology XT, to jOrgan?
What is the impact of external host programs (vst) running with jOrgan on latency, for example? I
have never used one while playing jOrgan.
A while ago, when Sven turned over future changes to jOrgan to Jonathan A.,
there was minor discussion of doing a reconstruction of it as a modular program which would have
allowed particular sections to be modified without impacting others. The customizer was one such
section where modular construction would be an improvement, as each user's physical console setup
is different.
Is there any, or enough interest to pursue that and is it a possibility?
As I listen to other organists, using virtual pipe organ programs (you know which l mean), who post
regularly on youtube, I am immediately aware of the difference in the quality of output sound in
comparison to jOrgan, particularly, the reverb.
Thanks, in advance, for comments and input.
Happy New Year to all!
John Beach
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From JohnR on Sat Mar 07 at 10:17
On Sun Jan 04 2026 John Beach wrote: 'Would it be difficult to add a "host" capability
for reverb plug-ins, such as Convology XT, to jOrgan?
Hi JohnB,
Thank you for raising this matter. My apologies for leaving it so long before replying.
I do not own a computer with a RAM large enough to do justice to most HW or GO sample-sets.
Since Fluidsynth version 2 was released, jOrgan users have been able to enjoy its greatly-
improved reverb sound. However, there is the drawback of the cyclic modulation of the reverb.
This "flaw" was apparently unavoidable if the greater quality of the reverb was to be
achieved, but for some users, it disqualifies the Fluidsynth 2 reverb from being a
satisfactory solution.
You ask if a VST reverb plug-in can be used by jOrgan in the quest for a good reverb.
It certainly can be. It formed part of Graham Goode's efforts with jOrgan on Puppy Linux
many years ago, and its use with Windows PC's is described in a long-standing Graham Goode
tutorial in the jOrgan InfoBase: "Using Jack Connections with VST Effects".
I believe it would be a great boon for jOrgan users if one of us were to use that tutorial
as the basis for a comprehensive report/tutorial on how to achieve a reverb that at least
equals and even improves on what is possible from HW or GO. Graham's tutorial is now so old
that a revision may be in order. Any offers?
Best wishes,
JohnR
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T POST
From John Beach on Sat 07-03-2026 at 14:40 PM
JohnR., thank you for your response concerning the fluidsynth reverb. I wish I had
the technical capability with programming to be able to do it myself, but I do not.
I hope that others, who do, will.
John Beach
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From Sven Meier on Sun 14-03-2026 at 12:26 AM
Hi everyone,
since FluidSynth’s reverb has been a recurring topic on the jOrgan list,
I thought it might be useful to share that the FluidSynth developers
have recently been working on improvements in this area. Please see the
quoted message from the FluidSynth mailing list below for details.
It might be a good opportunity for us to offer some feedback or
suggestions regarding this new feature.
https://www.fluidsynth.org/api/ReverbOverview.html
Regards
Sven
---------------------------------------
Dear all,
it took almost four years, but now there is an implementation ready for
supporting different reverb engines. Pls. check out this GitHub
discussion and feel free to share your thoughts:
https://github.com/FluidSynth/fluidsynth/discussions/1771
Tom
fluid-dev mailing list
[email protected]
https://lists.nongnu.org/mailman/listinfo/fluid-dev
______________________________________________________________________________________________________________
From John Beach on Sun 14-03-2026 at 1:04 PM
Sven, et al.,
It seems to me that, in order to be fair in our judgments, we would have to hear
a sustained organ chord in order to see whether any of the reverb engines that are proposed to
replace what is currently used in fluidsynth, eliminates the problem of "looped frequency
modulation" that is annoyingly persistent above an, about .015 setting of the Level element in
fluidsynth.
With the piano, snap and Water drop samples used, it is difficult to say that any particular one
is really superior to any of the others. It seems to me that, if the fluidsynth developers know
what the particular issue is that we,virtual organ users, have with the reverb level element,
they should be, specifically, seeking to eliminate that problem, or, if that is desired in the
case of other types of users, at least, offer a version in which the reverb element eliminates
the problem of "looped frequency modulation."
Thank you for sending the link to this test. Hopefully, something beneficial will result.
Until then, Creative Labs EAX is about the best substitute for reverb for those of us who,
still, use Creative Labs soundcards that were designed for the soundfont specification and
which allow for tinkering with the reverb settings in a reverb studio of the audio console.
John Beach
______________________________________________________________________________________________________________
From JohnR on Mon 16-03-2026 at 4:11 PM
Hi Sven,
Thank you for bringing this promising development in Fluidsynth to our attention.
As JohnB said, the samples provided do not exactly suit what we are listening for, but at least
two of the reverb engines (apart from the cyclic modulation one) do offer good sound, as far as
I could tell. So this could be the answer for jOrgan folk like JohnB, who have a real problem
with that modulation in the current FS version 2.
I have downloaded the pre-compiled binary for Windows 10, in the hope that I may be able to test
it out, using Jack for Windows. At the moment I will need help from a friend to sort it all out,
and have approached him about it.
Best wishes,
JohnR
______________________________________________________________________________________________________________
From Sven Meier on Thur 19-03-2026 at 7:42 AM
As a follow-up, I’ve tried the new reverb implementation and am happy to report that the updated
lexverb engine (“lex”) noticeably improves the audio quality to my ears. The sound is much clearer,
free of distortion, and overall responsiveness of pipes has improved as well.
I still need to test the Dattorro (“dat”) engine, but so far I’m very pleased with what the
FluidSynth developers have delivered.
Sven
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END OF THREAD
SF2 Player plugin
SF2 Player plugin
SF2 Player plugin
From Dr. Mark Bugeja MD on 2026-01-06 at 11.04
Hi guys,
I came across this:
https://www.kvraudio.com/news/bertom-audio-releases-free-sf2-player-plugin-65817
Would this be of any use/ help for jOrgan?
Mark
______________________________________________________________________________________________________________
From Lynn Walls on 2026-01-06 at 13:06
Probably not of any use for jOrgan. According to its web page this player only plays ONE
preset (i.e., one rank, one voice) at a time from only ONE selected MIDI channel. jOrgan
requires something like fluidsynth, which accepts MIDI input from MANY channels playing
MANY presets/voices/ranks simultaneously.
CLW
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From Dr. Mark Bugeja MD on 2026-01-06 at 17.14
Thanks Lynn.
I just asked to make sure we don't miss on anything that could potentially enhance the
experiences with jOrgan, improving on what we've got so far.
Mark
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END OF THREAD
Save As
Save As
From JohnR on 2026-02-05 at 16:58
Hi all,
I noticed that the late Bruce Miles' "organ notes" advises the use of "Save As". I have
created a new page for the jOrgan InfoBase to deal with this. Here is the draft of the
text, which can easily be modified. I would welcome any suggestions.
'jOrgan no longer offers the option, "Save As", when dealing with Disposition files.
When a user wants to make changes to an existing disposition and to save it with those
changes, it may be preferable firstly to create a renamed disposition before
making any changes, perhaps using the existing name but adding a version number
(e.g. "name_version_2.disposition" or "name_v.2.disposition". A simple work-around is to
copy the existing disposition "name.disposition", paste it to the Desktop, rename it there,
and then return it to the folder from which it was copied. This will leave the original
disposition file untouched.
The user can confidently open the renamed version in jOrgan, (by double-clicking on it),
and then make any changes, before saving it.'
Best wishes,
JohnR
______________________________________________________________________________________________________________
From Lynn Walls on 2026-02-05 at 00:50
for better clarity, change:
"...it may be preferable firstly to create a renamed disposition before making any changes..."
to:
"...it may be preferable firstly to create a renamed copy of the disposition before making any
changes..."
CLW
______________________________________________________________________________________________________________
From John Beach on 2026-02-06 at 02:10
I solved the problem of disposition confusion, long ago, by making copies, from the first
disposition after it has had all elements customised and soundfonts loaded in fluidsynth,
in the individual disposition folder and renaming them according to purpose . For example,
English Cathedral- Keyboards (for dispositions played manually) and English Cathedral- MIDI
for a disposition used to play MIDI files, exclusively,(with a MIDI sequencer program using
virtual midi cable outputting to jOrgan).
This is the quickest and least confusing and least work.
John Beach
______________________________________________________________________________________________________________
From JohnR on 2026-02-21-at 15:40 PM
Many thanks to Lynn and JohnB for your replies. I have inserted Lynn's suggested rewording
into the "Save As" jOrgan InfoBase page, and added a concluding sentence.
I have also placed an Annotation at para. 9 of Bruce Miles' jOrgan Notes, which can be
accessed at
https://jorgan.info/base/bm/jorgan_notes.pdf .
Best wishes,
JohnR
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END OF THREAD
full screen not full screen
full screen not full screen
From Paul Stringfellow on 2026-02-17 at 23:46
Hi,
I’m trying to use jOrgan on a Pi to make a simple MIDI controller.
I’ve got most of it figured out now, but when I set jOrgan to full screen, it leaves a bar top and
bottom that you can see the desktop behind. Has anyone come across this and know how to fix?
Thanks,
Paul
______________________________________________________________________________________________________________
From John Beach on 2026-02-18 at 01:18
Usually, when the condition you describe happens, the change to "Full view" is made by clicking
on the display symbol in the upper righthand corner of the "x"that closes the window. I believe
that, if the display is not "full," there will be two small squares, one slightly offset from the
other, and when you click on them, the change to full-view display will occur.
John Beach
______________________________________________________________________________________________________________
From Paul Stringfellow on 2026-02-18 at 01:27
Thanks John. It’s not that. I’m accessing full screen from the menu. I tried to send a photo, but
the list doesn’t allow it.
Paul
______________________________________________________________________________________________________________
From JohnR on 2026-02-18 at 06:55
Hi Paul,
Welcome to the Mailing List.
Have you tried to use the Customizer? Full Screen is enabled by going to the Customizer, page 2,
and clicking where appropriate. Try it.
Best wishes,
JohnR
______________________________________________________________________________________________________________
From Paul Stringfellow on 2026-02-18 at 06:59
Hi John,
Yes, that’s what I’ve done…
Paul
______________________________________________________________________________________________________________
From JohnR on 2026-02-18 at 09:58
Hi Paul,
Your reply is too short to be truly informative. But I assume it means that you have tried
that (clicking on the "0.0" each time on page 2 of the Customizer and then on "FINISH"), but
it made no difference.
Which disposition are you using?
Best wishes,
JohnR
______________________________________________________________________________________________________________
From Paul Stringfellow on Wed, Feb 18, 2026 11:03 PM
Hi John,
I wasn’t confused as to how to enable full screen mode, only that it wasn’t working.
I’ve just worked out how to get the OS to hide the taskbar (nothing ever simple with linux!),
and that seems to have worked, the full screen now fills the screen nicely.
Thanks for your help.
Paul
______________________________________________________________________________________________________________
From Chris Pearson on Thu, Feb 19, 2026 5:22 AM
Hi,
Pressing F11 works on my set up.
Chris Pearson
______________________________________________________________________________________________________________
From JohnR on Sat, Feb 21, at 14:51 PM
Hi Paul,
Congratulations at solving your problem!
I've been using RPi's for years now, for jOrgan and as a desktop, and I've never noticed
that particular problem. I put it to Google AI, and it returned two solutions, the choice
depending on how recent the RPi OS is.
Best wishes,
JohnR
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END OF THREAD
SAM on my Wyvern 4 manual jOrgan
SAM on my Wyvern 4 manual jOrgan
From Stephen Rowley on Thu, Apr 2, 2026 5:49 PM
Hello everyone.
I know it has been a long time since I was last here but my old jOrgan console was all working
fine. Now I have recently bought an old 4 Manual Wyvern organ console that has had all the
Wyvern electronics removed. I have fitted all the MIDI boards from my old console to this one
and it all works fine but, the Wyvern console has SAM on all the stops tabs which I would like
to use. With the help of a computer wizard friend we have come up with a program for an Arduino
that will take the MIDI note ON and Off to drive the SAM's but I can not find how to OUTPUT
the thumb piston MIDI information to my MIDISPORT 8X8. I also have a Glockenspiel from an old
Rogers organ I would like to add. I am sure there must be some information somewhere but I can
not find it so any help would be gratefully appreciated.
______________________________________________________________________________________________________________
From JohnR on Mon 2026-04-06 at 7:01 AM
Hi Stephen,
I warn you that using an old console, which I assume housed what was an analogue electronics organ,
can cause problems, as contacts which worked OK when fed with a particular voltage, become
unreliable when the voltage being fed for digital circuits is much lower. However, you have made
no mention about such things, so perhaps you will get away with it. I hope so.
The normal expectation for a piston switch is that there is a single wire to the encoder - in this
case the Arduino, with the other wire going to the common buss shared probably by the other console
switches. This should produce a Note On MIDI message when pressed, and a Note Off when released.
You use the jOrgan Customizer so that the disposition you are using learns to recognise those MIDI
messages. With everything running and the console powered up, go to page 3 of the Customizer
(File > Customizer) , and up at the top use the scroll arrow and select the MIDI device . This may
appear at the bottom of the list. Select the Activate cell of the piston in question (and click on
Cancel if you clicked the wrong cell!). Press the piston switch at the console, but keep it pressed.
Now click on the Deactivate cell, and then release the piston switch. This can be tricky, and you
may need the help of another person. Move on to the other pistons. Click on "Finish". Save the
disposition before closing it.
I hope I'm not missing something obvious. Please report back.
JohnR
__________________________________________________________________________________________________________
From RickW on Mon 2026-04-06 at 7:51 AM
Hello Stephen
I am not sure exactly what question you are asking?
Is it a hardware MIDI question, or a jOrgan question?
You say you have the SAMS on the console being driven by Arduino, but then talk about the Pistons?
What jOrgan disposition are you using?
Do you have jOrgan on screen Pistons triggering on screen combinations of of Stops?
In the "cleanest" scenario, you will have Pistons on your console sending MIDI "PC" (Program Change)
messages OUT from your Console.
In jOrgan you will need "Activate" messages on the jOrgan screen Pistons and a jOrgan "Connector"
Element to link the screen Pistons with your MIDI Interface.
Next you will need "Activate" "Deactivate" messages on your jOrgan screen Stops, connected through
the "Connector" Element in jOrgan out to your MIDI Interface.
If your Arduino MIDI Hardware is connected through different MIDI "Ports" of your MidiSport8x8,
then you will need multiple "Connector" Elements in jOrgan, one for each "Port" of your MidiSport8x8.
The specific "Stops" controlled through each Arduino board will need to be linked to the correct
"Connector" Element that is addressed to the correct "Port" of your MidiSport8x8.
Once you create a second or more "Connector" Element, you should start to see how this is going to
work.
Let us know if you need more detail. If you do, I will need a more detailed description of your
Arduino MIDI Hardware and how it is connected.
Regards
Rick
______________________________________________________________________________________________________________
From Stephen Rowley on Mon 2026-04-06 at 8:41 AM
Hello Rick.
Sorry I did not explain properly.
I have the SAM's connected and working in jOrgan, what I need is for jOrgan to energize the
solenoids on the SAM's when I push a thumb piston.
The Arduino will be connected to one of the output on the MIDI sport. The ardiuno has 127
shift register outputs which are connected to the JK flip flops the output of which drive the
Darlington transistors which energize the solenoids on each SAM.
When I push a thumb piston on the console the corresponding stop tabs on jOrgan move.
I am using the 3/15 Barton set at this time.
Hope this helps.
Regards
Steve.
______________________________________________________________________________________________________________
From JohnR on Frid 2026-04-10 at 12:48 PM
Stephen Rowley wrote:"what I need is for jOrgan to energize the solenoids on the SAM's
when I push a thumb piston. ... When I push a thumb piston on the console the corresponding
stop tabs on jOrgan move."
Hi Phil,
This indicates that you did not need the instructions I gave in my reply, which were made
due to my misreading of your original post.
I remind you of the Mailing List thread which you initiated late last year. In that thread
I drew attention to the sams-example.disposition, which I felt needed some revision, and so
I made available sams-example2.disposition. That thread also contained more detailed
information of your set-up, and this may be of interest to Rick.
In that thread I said that the example disposition did not make clear what the control
squares represented, but I did say that my conclusion was that they were STOP switches
(and so not PISTON switches). I am still of that opinion. Piston switches would not make a
lot of sense, as there will be times when you want to turn on (or off) a stop, without any
use of a piston to do it.
I believe that you have not given us any idea as to why your attempts to get the SAMs to
work did not succeed. That revised sams example should have been enough to point you in the
right direction. I think that was Sven's hope in setting the example dispositions up. Perhaps
you failed to notice that the Stops now had new messages (View > Messages), messages which
stops not associated with SAMs do not have. Or perhaps I didn't get the messages quite correct.
Best wishes,
JohnR
The thread can be viewed here:
https://jorgan.info/base/arch/l/link2025b.html#B27
The sams-example2.disposition (slightly corrected) can be downloaded here:
https://jorgan.info/base/arch/jr/sams-example2.disposition
______________________________________________________________________________________________________________
From JohnR on Frid 2026-04-10 at 2:57 PM
Hi Stephen and all,
My humble apologies for the start of my post sent almost two hours ago, when I attributed
Phil's post sent to the Mailing List late last year, to Stephen Rowley. Same subject, but
different people.
I think much of what the rest of my post said is quite relevant to Stephen's situation.
I hope the reason for no success with the SAMs turns out to be something quite simple.
Best wishes,
JohnR
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From Stephen Rowley on Frid 2026-04-10 at 4:43 PM
Hi John.
This is what I needed. Now can I do the same with the keyboards as I have inherited a
3 manual 22 rack Wurltizer organ I would like to use jOrgan as the relay system.
Regards
Steve.
______________________________________________________________________________________________________________
From JohnR on Frid 2026-04-10 at 8:07 PM
On Fri Apr 10 2026 Stephen Rowley wrote:"This is what I needed. Now can I do the same with
the keyboards as I have inherited a 3 manual 22 rack Wurltizer organ"
Hi Steve,
I'm assuming that this is a pipe organ. 22 ranks?
You can certainly use jOrgan to drive pipes. I have had no experience of doing this, but there
are others who do it successfully. My hope is that one of them will read this and offer to send
you a working disposition as an email attachment. You won't be able to use it directly, but it
will give you information which will save you and perhaps others (trying to help you) a lot of
work.
If you continue to have problems with either project, there is always the possibility of sending
them your disposition as an attachment, in the hope that they can quickly spot the error.
Best wishes,
JohnR
______________________________________________________________________________________________________________
From Stephen Rowley on Frid 2026-04-10 at 8:25 PM
Hi John.
Yes it is a pipe organ and one that is quite historic in the UK for being the last Wurlitzer
to be install by Wurlitzer in the UK. We are going to install it in to a friend's house.
As always you are a mine of information, Thank you and everyone for the time.
I will keep you updated with my progress.
Steve.
______________________________________________________________________________________________________________
From phil on Sat 2026-04-11 at 12:22 AM
John,
I understand the post was in reply to Stephen.
I wanted to mention that I did get the SAMs running just fine from jorgan via the examples.
I do know at that time I didn’t like something - IIRC some condition I needed where the linked
tabs in jorgan and the real tabs conflicted. So what I ended doing was reprogramming the main
microcontroller to send tabs information to the SAMS driver cards, and store the various tabs
& memory levels to an SD card on the fly. Since I’m using the Teensy 4.1 module as the console
controller and also as the controller on the SAMs driver cards, there’s plenty of speed. It’s
also all transmitted over ethernet. So far jorgan (also on ethernet) is working fine as the
“relay” for the organ.
Regards,
Phil
______________________________________________________________________________________________________________
From phil on Sat 2026-04-11 at 12:26 AM
Hi Stephen,
I currently am using jorgan as a relay for 3/11 Wurlitzer and it is working just fine. It takes
a bit to get used to ‘configuring’ jorgan but it will do the job.
Phil
______________________________________________________________________________________________________________
From Stephen Rowley on Sat 2026-04-11 at 1:17 AM
Hi Phil.
Would you have a sample deposition file so I can see how you used jOrgan as the relay.
Steve.
______________________________________________________________________________________________________________
NEWEST POST
From Lynn Walls on Sat 2026-04-11 at 6:02 AM
Once you have the .disposition file, here is a jOrgan disposition browser that you may find
useful for browsing through the disposition:
http://jorgan.freeddns.org:8192/cgi-bin/jorgan_xml.pl
CLW
______________________________________________________________________________________________________________
From Stephen Rowley on Sat 2026-04-11 at 8:10 AM
Thank you Lynn.
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END OF THREAD
Traps control
Traps control
From phil on Tues 2026-04-14 at 6:44 AM
Looking for help from the list.
I have a rank for traps - tambourine, castanets, snare drum, etc. These are outputs on a
midi driver card.
The basics on accompaniment manual:
1 I have a stop (from a stop tab) defined for each trap.
2 I have a rank defined as traps on channel 13 referred to by each trap stop tab.
3 The rank driver card has 1 trap per output pin (one trap per midi note).
4 I have the accompaniment keyboard defined as channel 3, 1-61 (0 to 60).
The problem I’m having is creating an output on a single pin (pin number defined by what
stop tab is on) when any key on the keyboard is pressed and then connecting that to the
stop/rank/output.
Looking for any clues here – I have not been able to find decent documentation for this
setup. Sample dispositions all drive sound engines via command codes with no visible note
handling.
Regards,
Phil Iehle
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END OF THREAD
Looped Modulation in
Looped Modulation in Fluidsynth reverb
From John Beach on Sun 2026-04-19 at 2:03 AM
I know that this subject is old and, annoyingly, boring. However, it caught me by surprise
this week as I was practicing service music.
I hit the "d" note in the octave above middle-c, Midi-note number 74, with only two stops
drawn, a boudon 8' and a diapason 8'. The result was a very pronounced, modulating, looped
sound that was very unnatural. I shut off one stop to determine which was the offending
wave file and believing it to be the diapason, I opened the soundfont in Polyphone to make
the correction to the looping, only to discover that there was no problem with the sound in
Polyphone.
It played a sustained tone of the "d" note with no offensive modulation.
I went back to the jOrgan disposition and, since I have Creative Labs Audigy 5.0 RX and the
reverb capabilities of EAX, I set the fluidsynth "level" to "O', the "off" position and
played the note. No modulation. Raising the level just one green light, the offensive
modulation was very noticeable.
I believe this problem is a combination of commixing frequencies, the actual
frequency of the pitch of the note and the specific, software-effectuated technique of
increasing "level," independent of "room," 'width" or "damping." That is, the
problem is in the instructions of "level," and the modulation problem commences
immediately above the "off" setting, with room and width and damping completely off.
My question is why would 'level" not be a detection of ambience-size rather than
a generation of effect on the sound source?? The idea of some relative equivalence is
quite fake.
Seemingly, the concept of reverberation, with respect to sound processing, should be
an independent, self-contained structure, the volume of a building, in which sound
is emitted, not modulated, unless by the source of tremulant or vibrato. I have never
detected that "baffling" from walls, corners, pillars or columns in large churches or
cathedrals, ever caused a frequential modulation of the sound.
I am wondering whether amplitude and frequency of impulse response wave file, with
respect to the "level" are modulated because there is no means of expressing a
"static" environment, electronically. That is, they are trying to replicate an extantial reality,
electronically, and it is, actually, impossible to do so.
It is what it is, and I am trying to understand the problem. But I know that sound in a space
can be recorded and played back. However, it is problematic to attempt to infuse the sound
source (wave file) with the parameters of the size of a space, artificially, to effectuate the
reality of the size of the space.
In MIDI, the fundamental actuator IS the wave file, without which, all the parameters
are meaningless. Apparently, this is true for concepts of reverberation. The
ambience is what it is, extantially, until a sound wave is emitted.
The sound wave reveals the relative size to the listener.
My thought is that the only realistic organ sounds achievable with jOrgan dispositions
would be those soundfonts that are made with samples (wave files) that have been
recorded with the reverberation ambience. They won't need the fluidsynth reverb at all.
John Beach
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From Via2 on Sun 2026-04-19 at 6:38 AM
Fascinating. I suggest ask AI in various ways of questioning. Various questions posed
to target the answer that properly covers all the minusua involved. Still, AI will lie
or make up stuff if in case it makes AI seem stupid, it’s been shown.
BEST REGARDS
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END OF THREAD
AI (off-topic)
AI (off-topic)
From Lynn Walls on Sun 2026-04-19 at 9:20 AM
It's somewhat true to say that AI "lies", but I don't really consider it lying in the true
sense. To me a "lie" is an overt attempt to deceive. The free on-the-internet AI robots
that I have communicated with do not have any sort of motivation to deceive. In fact,
they don't even know the difference between the truth and a lie. All they do is report
back to you whatever they find on in the internet and stop searching as soon as what they
have found seems to be a plausible response to whatever you have asked or stated. They
make no effort to determine the truth of what they report back. It seems they just report
whatever they find as soon as it seems to answer your question. They really don't
research deep enough to determine the actual "truth" of what they find.
CLW
-----------------------------------------
On 4/18/2026 4:38 PM, Via2 wrote in the thread "Looped Modulation in Fluidsynth reverb":
"Fascinating. I suggest ask AI in various ways of questioning. Various questions posed to
target the answer that properly covers all the minusua involved. Still, AI will lie or
make up stuff if in case it makes AI seem stupid, it’s been shown."
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From via2on on Sun 2026-04-19 at 11:30 AM
Right it’s just a search mechanism. Some info on the net may have errors that have been
referred to as lies by some. Which is just semantics, I suppose.
One has to pose questions in various ways to get to the detail to match what they seek.
That is the key.
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END OF THREAD
Piston indicator lights and launchpad support
Piston indicator lights and launchpad support
From Lynn Walls on Sun 2026-04-19 at 3:30 AM
Here is a video showing how a launchpad may be used with jOrgan.
It also shows how the jOrgan console display can show indicators for which piston was last
activated.
https://www.youtube.com/watch?v=ydGMzSRlWqY
Below is a link to the disposition shown in the video in case you want to examine it to
see how to configure these features.
https://www.dropbox.com/scl/fi/2udwkr5jcgqq7s6uj3k98/SC-88VL.disposition?rlkey=
zxr1xbfh254n8clavojct995n&st=ktngtzv5&dl=0
CLW
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From JohnR on Sat 2026-04-25 at 10:34 AM
Hi Lynn,
Thank you for sharing your disposition. Would you consider writing a short guide to help
interested persons find their way through the sections of the complex disposition which are
relevant to the use of the Launchpad?
What is the physical size of the Launchpad Mini? I made a brief search but did not find
any indication.
Best wishes,
JohnR
On Sun Apr 19 2026 Lynn Walls wrote:"Here is a video showing how a launchpad may be used
with jOrgan..."
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From Lynn Walls on Sun 2026-04-29 at 10:00 AM
JohnR,
The physical size of the LaunchPad Mini is 7.25" X 7.25" X 0.5"
It has been several years since I configured that disposition to support the LPMini.
But I will take a look at it again and try to extract the essentials of adding the
LPMini to an existing .disposition. I'll send the writeup to you personally for
review before posting it to the list just in case what I write needs more explanation.
Lynn
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NEWEST POST
From JohnR on Sun 2026-04-29 at 3:22 PM NEWEST POST
Hi Lynn,
Thank you. That will be very helpful. I plan to create a jOrgan InfoBase page to make it
easily accessible in the long term.
Would you say after some years of use, that the Launchpad has been a very worthwhile
addition to playing that disposition?
A search indicated to me that the Launchpad is stocked by music stores here in Sydney,
at a price much the same as in the U.S., allowing for currency conversion.
Best wishes,
JohnR
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END OF THREAD
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