Thanks for all the info. My set up has been quite reliable for years. (4 core cpu and 16 gigs ram) Things are not exactly Ok. rendering to a stereo wave (in the render menu) creates a mono file, What I did as a work around was recorded a stereo audio track of all the other tracks. then saved that track using the "saved track to file" from the track menu. That gave me a stereo wave file. I am not recording through an interface -just loading existing wave files.

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