QT player

[Peter]

I tried playing back 1 audio stereo file in catalyst using preset,... and it didnt work i needed to make a dummy video track alongside it...

[samsc]

I tried playing back 1 audio stereo file in catalyst using preset,... and it didnt work i needed to make a dummy video track alongside it...

there arent any 'frames' in a movie unless there is a video track.
audio only files dont have frames.

and catalyst uses in and out points that are determined by the frame position.

so you need to have a video track - it can be 1x1 pixel and black- it doesnt matter.