AutoTune (I call it Out-A-Tune) introduces horrendous artifacts that would
not be appropriate for restoration. Because of broadcast and motion picture
timing requirements, all professional AC-powered cutting systems used sync
motors that locked their speed to the power frequency. Battery powered
recordings would not be likely to have any hum.

The Plangent Process works from hum and bias to wring wow and flutter out of

Bob Olhsson Audio Mastery, Nashville TN
Mastering, Audio for Picture, Mix Evaluation and Quality Control
Over 40 years making people sound better than they ever imagined!

-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]] On Behalf Of Steven Smolian
Sent: Tuesday, December 20, 2011 9:40 AM
To: [log in to unmask]
Subject: [ARSCLIST] Auto-tune is audio restoration

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


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