Software to sync multiple tracks

[seamonkey]

And do a final mix to "mono"
It can reveal phase and EQ errors you missed in the stereo mix.

 

[DeepFriedBass]

Yes this. I'll basically have a recording of a show....a recording from the board, a recording from the stage, and a recording from the crowd and I'll need them to be synced up so I can mix them.

You do this manually by dragging the files over each other.

A trick is to make a signal wave before the band starts, just clap Into the mic for example. Then you just line up that single clap at the beginning of each waveform and they're synced

Another option is Reaper64 totally free. I prefer Ableton Live

 

[DeepFriedBass]

Or Audacity