I have a similar problem. Just on some of the audio.
Seems that audio I’ve created using iMic USB recording will play in the footage bin, but won’t show a waveform in the timeline, nor will it preview in the timeline. Tried all the usual suspects: preview settings, various previews, etc.
Have tried exporting from the software (same problem with FFinal Vinyl and Audacity) as aiff, wav, etc., bringing into Quicktime proo 7.1.1 and re-exporting as aiff, quicktime mov, etc. 16-bit. Still doesn’t show up in timeline with waveform or pprview capaabilities. BUT, the audio will render. AND all the other audio not created in these programs preview fine. Any clues?
thanks.