Just recording a sound and then "playing-it-back-slowly" alters the pitch of notes. Double the playback time, and all the notes drop an octave (if I remember my maths right).

The trick is to do some funky maths to alter the playback time without changing the pitch. Most sound editting packages (Goldwave, SoundForge etc) can do this. I don't know whether the pocket-recorder would manage it though. I use Goldwave, and if I need to learn something difficult then I tend to record it to the hard drive and generate a couple of slowed-down versions, one at about half-speed and one at quarter-speed. I then blow all three recordings to a CDR, so that I can play it back through my hi-fi instead of being limited to playing it through the PC speakers.

Noteworthy is a different kettle of fish altogether. It doesn't record sound at all, it just generates notes of specific duration - you want it played slower, it can hold the notes on for longer. This is great for playing stuff which is written down in dots, but isn't useful for working out what someone's playing on a recording. And since it isn't playing back a recording, there's no pitch shift problems slowing it down (which Guest was talking about).

Graham.