A 15 minute cassette? Why?

[@Retroaria]

I remember this era of MSX games.

[@CBitsTech]

@@Retroaria I never had an MSX compatible computer. I'll look into them.

[@just_passing_through]

Games and telephone answering machines frequently used 15 minute tapes.

[@CBitsTech]

I forgot about answering machines.

[@kovutlk]

For a speed calibration tape record a 3khz sinewave on your quartz locked deck. Then you can set the speed using either a frequency counter, a spectrogram app, an oscilloscope or wfgui. The advantage of using wfgui is you can test for wow and flutter as well, given your recording deck has low w&f itself. wfgui is free software you can find online.

[@CBitsTech]

@@kovutlk I don't like the sound of a 3khz tone, but I do want to experiment with wfgui, thanks. I'd rather use my method for speed calibration, but wfgui would be good for wow and flutter, thanks.

[@AvidRetro]

I have found using one of these shorter tapes is a good way of exercising an old auto reverse walkman :)

[@CBitsTech]

@@AvidRetro Actually, that was the primary reason I looked for one in the first place. I now have two C-10 cassettes for that purpose (forthcoming video).