Misha,

How did you create the mp3 from BIAB? I notice that it is 192 kbps, 48,000 Hz.

The arranger file, on the other hand is 192/44,100.

This difference in frequency might be impacting in some way. I'm not sure how but it is something to consider.

In BIAB, such a frequency difference can cause issues between MIDI and audio if the soundcard is not set so that BIAB can take control and operate it at 44,100. This is a Windows setting. (See image below -- it's #4.)

Also, rendered files in BIAB default to create an acidized loop which means that if you drop the audio into (say) Sonar, it will automatically adjust to the tempo set in Sonar. I wonder if this too might be impacting in some way?

These are a couple of things that I'd investigate just to make sure that they are not having any impact.

Regards,
Noel

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