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Electrical records have at least some hum in the 50-60 cycle range,
depending on where it was recorded.

 

Assuming a separate send that only contains audio below 70 hz from the
source, 

 

has anyone experimented using Auto-tune to track this and/or other hums
(condenser mikes, cutting heads, etc.) to establish the proper playing speed
and to correct deviations therefrom?   If effective, this would hold true
for 78s and mono LPs and tapes as well as stereo material.

 

Steve Smolian