Hi Knight -
If you're transferring audio tracks, then definitely WAV. If you want to transfer an Instrument (MIDI) track, then you have two choices..
- You could bounce it down to audio, as above (again, as a WAV file) -- this is easy, but you lose the ability to make further MIDI tweaks in the destination DAW, since you'd be importing the rendered audio and not the MIDI data
- You can export it as a Standard MIDI File -- this will transfer the MIDI data over to the destination DAW, but not the Instrument plug-in that actually creates the sound. It's a little more complicated because to duplicate the sound exactly you'd have to manually select the same Instrument plug-in in the new DAW, which you can only do if you have the same Instrument plug-in installed for both DAWs. If not, then you 'll have to select a suitable replacement Instrument. This could be a better one, but even if it is, it might not be a perfect match for the performance data -- specifically it may not respond to MIDI Velocity (musical dynamics) the same way the original Instrument did, and the performance may sound wrong or not as intended -- that would then require you to tweak the MIDI Velocity curve, which is easier in some DAWs than others. Still, this would be the most flexible option for MIDI/Instrument tracks, if you're ok with putting in some extra work to optimize the sound in the new DAW,