Ah! Yes! Thanks, Paul! That helps. (and that person who asked would be me!)
On Mon, Apr 24, 2017 at 6:09 PM, Paul Stamler <[log in to unmask]> wrote:
> On 4/24/2017 3:34 PM, Richard L. Hess wrote:
>> A quarter tone is very noticeable to musicians.
> You betcha. And an overall error in speed can be very noticeable, though
> sometimes in an un-obvious way.
> I had a reminder of that not long ago. There's an LP on Vanguard called
> "Mississippi John Hurt's Greatest Hits", which is actually a recording of a
> live concert he gave at Oberlin. I had always thought this was a pretty
> lackluster recording, lacking in energy and spirit. Came time to digitize,
> and I checked some hum that was recorded during the runup to one of the
> songs. Lo and behold, it was playing back at 97.533% of 60Hz. When I sped
> the recording up a reciprocal amount in the DAW (using resampling), lo and
> behold the recording was a top-notch MJH performance. Amazing what
> difference getting pitch and tempo right can make to the subjective impact
> of a recording.
> How did Vanguard come to release an off-speed LP? My guess is that the
> concert was recorded, probably by the campus radio station, using a tape
> recorder that was running a little fast, then Vanguard cut the master using
> a recorder running at the right speed.
> PS To the person who asked whether a 2 rpm difference in turntable speed
> would make a constant pitch change, regardless of whether the speeds were
> 78 and 80 rpm or 76 and 78 rpm...no. Our perception of pitch, like most
> human senses, is logarithmic, meaning we perceive ratios. Since 80/78 isn't
> the same as 78/76, these errors would sound difference. We sense things
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