When doing online collaborations using ANY file format, I have found that it is a good idea to get everyone to insert a Marker on the audio timeline of some sort at a preset timing before the actual music starts. I use the two-sconds-exactly-before tried and true "twobeep" from radio broadcasting for such, which is just a 1KHz sinewave BEEP inserted on the timeline exactly two measured seconds before that critical first waveform rise.

One could also use a handclap, or a kick drum or any other short and recognizable sound, as well.

Even when there are countins involved, this can be critical stuff, for example, different mp3 codecs insert differing amounts of ID data in front of the audio and different playback devices and softwares may handle that differently, which can SHIFT the track a bit further down the timeline, losing certain things like feel, whether or not the track performance was intentionally played or sund on the beat, ahead of the beat, or laid back "behind the beat" etc.

It also can lead to a track gradually losing sync as the song progresses.

With the use of the same prearranged Marker by all, it is a simple matter to visually align all tracks in whatever DAW progrm in use, visually, by simply sliding the tracks until all markers are lined up.

Audacity is great for measuring the timeline and inserting this kind of marker, BTW.


--Mac

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