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0.9.21 Volume Automation not working on export


Currently using 0.9.21. In one song I have two drum tracks with volume automation - drums fading in. When playing in sequencer everything works fine. Though, when exporting the complete song, the automation of the volume of the two drum tracks doesn't play and so the drums aren't fading in. Playing the automation is set to ON at both the tracks. So, it should work but doesn't.

Don't know about previous versions. I composed and recorded this song with 0.9.21.


rncbc's picture

may you add some more details, especially regarding the automated tracks, whether they're audio or MIDI?
can you share the simplest session archive/zip file (*.qtz) where the issue maybe reproduced ?


TAERSH's picture

They are MIDI tracks using Calf FluidSynth plugin. The FluidSynth plugin uses my own created .sf2 files for Drums.
These .sf2 files are not General MIDI, so the keys e.g. for SD, HiHat etc. wont fit to the general MIDI keys used for SD, HiHat etc.
So you might get strange sounding grooves to listen.

A .qtz archive including both drum tracks would be enough?

rncbc's picture

just a little note, before we go overboard :)

if you're doing Track > Export Tracks > MIDI... (export to SMF), then it's explained: MIDI track volume automation is just about sending MIDI CC#7 (channel volume controller) events or messages through the plugin chain: it affects (or not) the plugin instruments audio rendering output, on playback, but it does not make any transformation to the MIDI being read, merged and exported, if that's what you've expected.

that said, you may hear the result to MIDI volume automation on playback (audio) output alright, but you won't see any effect or difference to the exported/merged MIDI files whatsoever.

maybe this is it? if it is, it's all WAD (working as designed:))
if it's not, then please, send in the .qtz!


TAERSH's picture


The initrd.gz is attached below to my previous post.

I'm not exporting to MIDI. I'm exporting the complete Song (Audio & MIDI tracks) into an .ogg file. Exporting a complete Song into an audio stereo file should play the automation just like it does when simply playing the song within Qtractor.

If MIDI tracks don't export the automation of e.g. volume fader into a stereo audio file, I'm wondering then why is there such useless function/option on MIDI tracks?

TAERSH's picture

The .qtz archive.

Please, remove it after downloading.

rncbc's picture

hi, thanks,

it is confirmed now:
MIDI track volume automation is not being reflected on the exported audio file... it seems to assume a constant value that at the current play-head location...

on a side note, the issue (bug) is not exclusive to this latest v0.9.21. as it's been there since, at least v0.9.19, or probably forever? :)

I'll look after this long forgotten bug (or misfeature) in these coming days, hopefully...

cheers && thanks once again

TAERSH's picture

Yes, I checked back until 0.9.19 and results were equal. On 0.9.15 it doesn't export anything, but this could be caused by the .qtz document itself, being created/stored with 0.9.21.

However, I discovered another issue on a plugin. Doing a new topic.


rncbc's picture

yes, that's right, it's MIDI track volume automation (and possibly panning as well) that won't ever work correctly or at all.

note that this only applies to MIDI tracks and to MIDI track's volume and panning controls only, which are not scalar discrete DSP controls, like on audio tracks, but rather hard-code faking the respective GM channel volume and panning controllers (CC#7 and CC#10) respectively.

so that this all falls into the WALAD category, as already mentioned in a previous reply: working as long ago designed :)

again, this only applies to MIDI tracks volume and panning; all other automatable controls, most importantly all plugin parameters, do work as expected on playback and export. It's just that those can't just work, at least reliably, let alone sample-accurate, on export.


TAERSH's picture


Any chance that this volume automation will work on MIDI tracks in the near future?

At least it doesn't make any sense to have volume automation on MIDI tracks, if it just doesn't work... ;)

rncbc's picture

well, it works on playback, only that on audio export that it is not there, and maybe never will, sorry for that.

in fact, this is not a new issue at all: the often suggested workaround is about inserting a plain audio_fx amp plugin right _after_ the MIDI instrument plugin and automate that instead of MIDI track volume (or panning), which as said only sends CC#7 (CC#10) through the plugin chain and actually depends on the instrument implementation wrt. MIDI channel volume (or panning) controllers.

try that; you won't regret :)


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