--- In logic-users@yahoogroups.com, "vincentkenis" <vincent.k@...> wrote: > > 1° in Logic, I would like to quantize a whole clickless song to a fixed tempo by timestretching > its audio files. Is there an easy quick way to do this in Logic ? > > 2° After giving the consolidated quantized files to a friend who will post-produce / edit them > a gogo using Cubase, I would like to import the resulting new Cubase/Reason tracks > in the original (quantized) Logic song, where they should fit tempo wise. But then I would like > to apply to these tracks a time-stretch process which would be the inverse of the process > applied to the original files in 1°, and thus align them to the original (unquantized) > perfrmance. How do I do this ? > > Can Serato's Pitch'n'Time LE help me with this other than by providing a superior algorythm > for Time Machine ? I think you're going about this backwards, and in doing so will degrade the quality of your audio unnecessarily. The best way to do this sort of thing is to use beat mapping in logic to tighten the audio to logics grid (logic will create tempo changes so that the audio fits to bar). Then export it as a midi file (with the tempo)(you may need to create dummy regions that are as long as the track for it to export correctly). Then get your mate to load the midi file and audio files, then his version of the song will be in time with your version (where the tempo changes, but the audio does not). Then the grids in cubase will be to the bar (facilitating editing and programming) yet the audio will not change. Its quite a complex idea but works very well, essentially you do pretty much everything BUT change the tempo of the audio ;-) Mike