[LAD] Qtractor's mixer - Was: Ardour MIDI tracer

Ralf Mardorf ralf.mardorf at alice-dsl.net
Tue Aug 19 13:13:46 UTC 2014

On Mon, 2014-08-18 at 16:04 +0100, Rui Nuno Capela wrote:
> while on midi tracks, qtractor mixer/track faders simply deals midi 
> channel volume (cc#7) and panning (cc#10) messages and that's from its 
> birth model design (mainly due external/outboard midi h/w).
> iow. qtractor midi track faders doesn't deal or affect synth-generated 
> audio signal whatsoever, at least directly--it all depends on each synth 
> midi implementation, that is--so "pre" or "post-fader" conventions 
> doesn't apply nor make much sense there.
> fwiw. all generated audio signal from synth/instrument plugins is routed 
> to some (optional) audio output bus (default sink is "master"). and yes 
> that will be the one true audio fader you probably should look when 
> dealing midi instrument plugins audio output.
> remember that the qtractor mixer might NOT ever be the final stage of a 
> mix; qtractor is not, never was, won't ever be, a monolithic solution :)
> hth.
> cheers

No this does not help, Qtractor doesn't store and restore all jackd
connections, so another tool, e.g. aj-snapshot is needed. Qtractor
doesn't allow to give understandable names to inserts ports, they are
named _insert_n, where n is the number of the insert, if you add a new
insert, the numbering is reorganised by Qtractor, _insert_4 could become
_insert_5. After making 5 minutes music, I now need to reconnect the
audio connections for the next 2 hours. You might claim, that if you
click the connecting dialog for the insert, it will only show the
assigned jackd ports and not all the other ports. I'm using 16 MIDI
tracks, this is true for track 2 to 16, but not for track 1, likely
because it starts with the first insert that is named "_insert" without
"n". However, I'm using connections to external gear, when the
connections get reorganized by Qtracor and aj-snapshot hen will do wrong
connections, this could damage speakers.

If Qtractor's mixer isn't intended as the real mixer, what mixer can be
used with Qtractor?

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