Also note that you should not use the export option for the final render. As it is not designed for that (at least for now) but to export individual buses. It also does not take into account AuxSends between buses.
In Qtractor, the reliable way to export a final render is to record in real time to an external recorder such as Audacity, Cadence-render, or other software. Another way is to create a dedicated export bus and track within the project and record to the system monitor when you play the project (just make sure that only the project's audio plays on your system).
Ultimately, this is the most reliable way to render, as you record exactly what you hear. This applies to Qtractor and any DAW.
Also note that you should not use the export option for the final render. As it is not designed for that (at least for now) but to export individual buses. It also does not take into account AuxSends between buses.
In Qtractor, the reliable way to export a final render is to record in real time to an external recorder such as Audacity, Cadence-render, or other software. Another way is to create a dedicated export bus and track within the project and record to the system monitor when you play the project (just make sure that only the project's audio plays on your system).
Ultimately, this is the most reliable way to render, as you record exactly what you hear. This applies to Qtractor and any DAW.
This wiki article covers all of these topics:
https://sourceforge.net/p/qtractor/wiki/How%20To%20-%2013%20Make%20Succ…