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Interesting posts here. I think everyone who has messed with tapes made on old battery powered cassette decks has experienced this problem, when the batteries start to decline (and didn't they always?). My comment is that it isn't very hard to hear small changes in pitch with speaking. Going up or down a half step changes it pretty dramatically. So it should be possible to get the speed close to right, despite the fact that is was not changing at a constant rate, just by listening and making the speech match in tone. Hopefully the pitch was right at the beginning, and if you can get the sound of the spoken voices to match throughout the course of the recording, the intelligibility should be maximum. On the computer programs, you have to be sure to alter the pitch and speed at the same time, as if in analog domain. All the programs I have seen give you this option. Jamie's suggestions are good too, if this is something valuable. There is usually some kind of hum, and with luck, it might be constant if it was in the room. We don't live in very quiet environments, and low bass noises fill an interior space much more than we are aware. I had to get the pitch right for a short spoken recording by family members, on a small, very warped instantaneous recording from the mid-1940's that would not track at anything like the correct speed. One of the group being recorded was a violinist (Henri Temianka) who was going to perform the Beethoven concerto the next day, and he whistled some of it as a gag. Since most violinists have perfect pitch, that gave me an easy clue to pitch all of it. That was a lucky break and it worked well. But this was not an instance of changing pitch. A different but related problem is where we are faced with transcribing transcription discs where the pitch changes across the disc, undoubtedly because of a problem with the motor on the recording machine not being able to keep the speed up in light of the heavy recording head advancing across the disc. The disc slowed down as it progressed, causing the pitch to rise gradually on playback (I don't know what happens if the recording starts from the inside moving out--maybe the opposite?). From my experience, which is admittedly limited with this particular problem, the rate of change was constant, which is an easy fix these days. Bit where batteries are wearing out, I don't think we can expect a constant rate of change. Best, John Haley On Sat, Feb 27, 2016 at 12:20 PM, Richard L. Hess <[log in to unmask]> wrote: > Jamie, > > If you can live with up to 8-inch diameter 1/4-inch reels, the Racal Store > 4DS can do 15/16 in/s with caveats. > > For cassettes, there was a Nakamichi deck that was astounding at 15/16 > in/s. > http://www.naks.com/products/nakamichi_680zx.html > I believe that the 680 also operated at that speed. > > Since I receive very few 15/16 in/s tapes, I am content to transfer them > in a Dragon at 1 7/8 in/s and then slow down by 50 % in the computer. > > Cheers, > > Richard > > > > > On 2/27/2016 1:18 AM, Jamie Howarth wrote: > >> I’d love to find a mechanism that would do 15/16IPS —— anybody know of a >> decent quality deck that will do that? >> > -- > Richard L. Hess email: [log in to unmask] > Aurora, Ontario, Canada 647 479 2800 > http://www.richardhess.com/tape/contact.htm > Quality tape transfers -- even from hard-to-play tapes. >