I'm gonna guess that the OP (and many others) might use Git purely for the source file. I don't know about other DAWs but Ableton which is my DAW of choice has .als (which is usually pretty small) which contains references to the WAV and other dependent files. Of course, this doesn't solve the (common) problem of losing all your audio files but it does maybe make this approach a bit more feasible...
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I'm gonna guess that the OP (and many others) might use Git purely for the source file. I don't know about other DAWs but Ableton which is my DAW of choice has .als (which is usually pretty small) which contains references to the WAV and other dependent files. Of course, this doesn't solve the (common) problem of losing all your audio files but it does maybe make this approach a bit more feasible...