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Thanks for the lightning-fast reply :-)

1) SOFT SYNTH GUI PATCH CHANGE NOT DETECTED
I'll try using the Mixer window a bit more, but I tend not to touch it that much, as I only work on one screen (as I think you've said yourself, it's ideal for a second screen). Anyway, this is by no means a fatal issue, but I've reported it here:

https://sourceforge.net/p/qtractor/tickets/48/

2) TEMPO MAP/MARKERS DIALOGUE BOX
OK, have reported here:

https://sourceforge.net/p/qtractor/tickets/49/

3) DEDICATED AUDIO CONNECTIONS NOT PERSISTENT
As far as I can see, it's only the second order (and possibly up, though I have no more outputs to use) that causes problems and yes, it happens every single time. It's probably not that relevant, but it happens when re-loading both standard projects and templates. Please let me know if you'd like me to report.

4) BUS PLUG-IN SETTINGS NOT PERSISTENT
Thanks for the clarification. I'll explain what I'm trying to accomplish - perhaps I'm going about this in the wrong way.

Firstly, I'm aware of your stance on "Qtractor is not a DAW, but a sequencer with some DAW-like features", so I'm not sure if the kind of thing I want to do (which is possible in DAWs such as Ardour etc) is possible in/planned for Qtractor, but what I'd like to do is:

- When several tracks are routed through the same bus, have plug-ins on this bus, so that all these tracks share the plug-ins
- Specifically, I'm thinking of things like high/low pass filters, but this could be any plug-in. I'm not thinking about "instruments", but "effects"
- As an example, I'd like to put high/low pass filters on the Master Audio Bus' "Output Plugins", so that the audio file I export is already filtered in these areas (to remove unnecessary very low/high frequencies)
- Adding the filters in the above way can be done, but when the project is re-loaded, the filters' settings return to their defaults (e.g. for Calf Filter, it will return to the default "12dB/oct Lowpass", with default values for Frequency/Resonance/Inertia). This means that you have to re-configure such plug-ins each time you load a project

Is the above kind of approach possible? Or is it a bad idea in the first place?

Ideally, for large projects, I'd like to send several (groups of) tracks to the same bus (e.g. a reverb bus), before they reach the master out, so that they can all share the effect and I don't have to add the effect to each track individually. In Ardour, you can do this with Sends, adjusting the percentage of the track you want to send to the bus. Such features though, are very likely in the realm of the full DAW, rather than the "sequencer with some DAW-like features" and people have raised similar issues in the past:

http://www.rncbc.org/drupal/node/558
http://www.rncbc.org/drupal/node/251

...so if this kind of behaviour is beyond the planned scope for Qtractor, I'll just use Ardour for complex projects and Qtractor for simpler ones. It would be a shame if this turns out to be the case, as I much prefer working in Qtractor to Ardour (it's cleaner, lighter, more "fun" :-)), but I respect your decision on having a defined scope for the project.

5) IGNORE MIDI EVENTS?
I have no idea what causes this, but have seen other people on the net with the same issue, on Windows and Mac as well as Linux, so it seems to be a hardware thing. I'll try contacting M-Audio, but they don't appear to have resolved things for other people :-( Thanks very much for the info on QMidiRoute etc - I wasn't aware of any of those. Will look into them...

Thanks very much once again for Qtractor and all your work in Linux Audio!