Bug reports
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- KVRist
- 87 posts since 3 Jun, 2025
Thank you for such a quick response (and fix already!). This level of support certainly encourages me to proceed with committing my time, effort and cash to RC. I have spent much of the day working thru the Gene Brown videos and I plan now to read the whole manual. So far, I am extremely impressed!
Retired software engineer. Windows 11, Studio One Pro
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- KVRist
- 87 posts since 3 Jun, 2025
As a learning exercise, I am (slowly) working thru all the capabilities of RC in a fairly systematic manner and I have now reached the Melody Editor accessed from a Motive generator. With trial and error, it is starting to make sense, despite very little tutorial information anywhere on the web.
But I think there is a bug in chord playback.
I started with an existing chord progression with 9 chords over 8 measures. And it appeared to play all 9 in the right order, but with the wrong timing. I.e. the chords play in the wrong measures. The "extra" chord was added to the first measure - and with unreliable timing. See my video - where I first show the progression and then let the melody editor play it twice.
But I think there is a bug in chord playback.
I started with an existing chord progression with 9 chords over 8 measures. And it appeared to play all 9 in the right order, but with the wrong timing. I.e. the chords play in the wrong measures. The "extra" chord was added to the first measure - and with unreliable timing. See my video - where I first show the progression and then let the melody editor play it twice.
Retired software engineer. Windows 11, Studio One Pro
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
Hi Brian,
please click on the 'chords' button to display what is being played back:
If you want to create a melody for specific chords, it is necessary to display the chords using the button above.
If you double-click on a "Motive Generator", the master tracks chords are copied to the Melody Editor. If you just switch tabs, the previous chords remain in the Melody Editor.
More and more tutorial videos are posted on our . Yesterday a new one was uploaded about melody harmonization.
Thanks,
Attila
please click on the 'chords' button to display what is being played back:

If you want to create a melody for specific chords, it is necessary to display the chords using the button above.
If you double-click on a "Motive Generator", the master tracks chords are copied to the Melody Editor. If you just switch tabs, the previous chords remain in the Melody Editor.
More and more tutorial videos are posted on our . Yesterday a new one was uploaded about melody harmonization.
Thanks,
Attila
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
Hello Charlie,musicdevelopments wrote: Wed Jun 04, 2025 6:47 pmHello Charlie,Charlie Firpo wrote: Tue Jun 03, 2025 11:59 am Hello! I've been noticing something weird happening with the latest Syne. If i load one instance in the daw = no problem.
But as soon as i add another one, the second instance get a black screen. If i close the window and open it again, i get two screens (the regular window, and a black one besides it)
I am sorry about this, I'll check it ASAP!
Thanks,
Attila
Good news, I managed to fix this, and another bug for window resizing (on Windows only in the VST/VST3 plug-ins). Syne v1.5.3 is uploaded now with these fixes.
Thanks for reporting this!
Attila
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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- KVRist
- 87 posts since 3 Jun, 2025
Thanks for the reply Attila.
I *had* missed the chords button, but it makes no difference. The chords timing playback is still wrong. See the new video, where I am narrating though my voice has come our rather quiet.
I *had* missed the chords button, but it makes no difference. The chords timing playback is still wrong. See the new video, where I am narrating though my voice has come our rather quiet.
Retired software engineer. Windows 11, Studio One Pro
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
OMG, you are right, Brian, the chords timing is totally wrong. I did try it today and I found it worked well, but now I'll do the exact same steps what you did in the video. Thank you for reporting this strange bug!
Thanks!
Attila
Thanks!
Attila
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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- KVRist
- 87 posts since 3 Jun, 2025
And another detail, audible in the videos but I didn't highlight it. In yesterday's video, on the first play, measure 1 was (incorrectly) split 3:1 beats, but the second play it was split 2:2. In today's video, both plays are split 3:1. But this inconsistency might help point to the underlying bug.
Retired software engineer. Windows 11, Studio One Pro
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
Thank you, Brian! 
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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- KVRist
- 332 posts since 22 Feb, 2005
Great! Thank you very much!musicdevelopments wrote: Sun Jun 08, 2025 2:56 pmHello Charlie,musicdevelopments wrote: Wed Jun 04, 2025 6:47 pmHello Charlie,Charlie Firpo wrote: Tue Jun 03, 2025 11:59 am Hello! I've been noticing something weird happening with the latest Syne. If i load one instance in the daw = no problem.
But as soon as i add another one, the second instance get a black screen. If i close the window and open it again, i get two screens (the regular window, and a black one besides it)
I am sorry about this, I'll check it ASAP!
Thanks,
Attila
Good news, I managed to fix this, and another bug for window resizing (on Windows only in the VST/VST3 plug-ins). Syne v1.5.3 is uploaded now with these fixes.
Thanks for reporting this!
Attila
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
Hi Brian,Brian Collins wrote: Sun Jun 08, 2025 3:54 pm And another detail, audible in the videos but I didn't highlight it. In yesterday's video, on the first play, measure 1 was (incorrectly) split 3:1 beats, but the second play it was split 2:2. In today's video, both plays are split 3:1. But this inconsistency might help point to the underlying bug.
Thanks for reporting this bug! I managed to fix it today. The problem was that when the temporary preview composition was created, the chord lengths in the progression were ignored.
I'll send you an update probably tomorrow.
Thank you!
Attila
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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- KVRer
- 25 posts since 30 Jul, 2018
https://i.imgur.com/XEKaAZU.png
I think phrase order is broken
I think phrase order is broken
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
Hi Brian,musicdevelopments wrote: Mon Jun 09, 2025 4:18 pmHi Brian,Brian Collins wrote: Sun Jun 08, 2025 3:54 pm And another detail, audible in the videos but I didn't highlight it. In yesterday's video, on the first play, measure 1 was (incorrectly) split 3:1 beats, but the second play it was split 2:2. In today's video, both plays are split 3:1. But this inconsistency might help point to the underlying bug.
Thanks for reporting this bug! I managed to fix it today. The problem was that when the temporary preview composition was created, the chord lengths in the progression were ignored.
I'll send you an update probably tomorrow.
Thank you!
Attila
I sent you a DM with the fixed version download links.
EDIT: I meant PM (Private Message on this forum)
Thanks,
Attila
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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musicdevelopments musicdevelopments https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=223336
- KVRAF
- Topic Starter
- 6010 posts since 9 Jan, 2010
Please always include whether you are on macOS or Windows, and even more details are welcome, like DAW + versions.heliacal wrote: Mon Jun 09, 2025 4:56 pm I am still getting a 2+ minute shutdown of DAW's when Rapid Composer is used as a VST.
I assume you are on macOS, and your Documents folder is on iCloud. Does your DAW have read/write access to your ~/Documents folder?
If your DAW is not Logic Pro X, please start your DAW in the Terminal, and examine the printouts when you shut it down with RapidComposer. (This does not work with Logic Pro X as it hosts instruments in another process.)
Thanks,
Attila
https://www.musicdevelopments.com
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
Home of RapidComposer, Melodya, MIDI Mutator and Syne
Summer Sale • June 3-15 • 40% off RapidComposer, Melodya, MIDI Mutator, Syne
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- KVRist
- 332 posts since 22 Feb, 2005
Attila, i'm having so much fun with Syne. It sounds very good and it's suprisingly light on cpu. However:
1) I can't get the "mono+legato" mode to work? The envelope keep restarting.
2) Thank you for fixing the bug i reported a couple of days ago. The double window is gone. Unfortunately i still get crashes. I've tried to find the culprit but no luck so far. Here's what i believe i was doing last time it crashed:
I opened the plugin. Chosed "mono legato" mode and "create new preset". Then i added a partial modul and maximized the window. I messed around in the window, painted partials, then i minimized the window & believe i added an adsr. And then it crashed & closed down Renoise. Just a few minutes ago i had a successful session with syne. But when i was going to delete it from the Renoise instrument slot (Right mouse click on instrument+delete), the entire daw shut down again. I wish i could give you more details, but it's been so random.
Win10 + Renoise
1) I can't get the "mono+legato" mode to work? The envelope keep restarting.
2) Thank you for fixing the bug i reported a couple of days ago. The double window is gone. Unfortunately i still get crashes. I've tried to find the culprit but no luck so far. Here's what i believe i was doing last time it crashed:
I opened the plugin. Chosed "mono legato" mode and "create new preset". Then i added a partial modul and maximized the window. I messed around in the window, painted partials, then i minimized the window & believe i added an adsr. And then it crashed & closed down Renoise. Just a few minutes ago i had a successful session with syne. But when i was going to delete it from the Renoise instrument slot (Right mouse click on instrument+delete), the entire daw shut down again. I wish i could give you more details, but it's been so random.
Win10 + Renoise
