[ProAudio] Dolby A with no tones (was 4-channel program distribution format(s))

Bob Katz bobkatz at digido.com
Wed Jan 25 13:56:15 PST 2023

Then we get into calibration vexation. The number of Cat 22s where the Dolby tone was at the incorrect level was VERY HIGH. So we resorted to putting notes on the tape box to use the 1k, not the Dolby tone. But it was a lose lose proposition. Unless the one making the transfer knew exactly how well their Dolby was calibrated. 


My iPhone made me write this. Quotes only below this line. Nothing more to see here. 

> On Jan 25, 2023, at 4:16 PM, Scott Dorsey <kludge at panix.com> wrote:
> Yes, but it's even more than that.  The tone isn't just level, the tone is
> an absolute certain indication that it was recorded with Dolby A.  When you
> hear that sound, you know what you're in for and how to play it back.  If
> you don't hear it, you don't know to expect it.  When the box says one thing
> and the tones say another thing, all you can do is use your ears....
> --scott

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