HQL

<<<No harmonic quality is lost by speeding things up, because the waveform
is identical and so all harmonics are identically placed. It won't
sound like chipmunks because the original frequencies are all very low
and the speeding up is required to bring it into human hearing range.>>>

Oh dear!!!!!

We're at cross purposes!!!!

I meant "harmonic quality" in a sence of "VARIETY", and differences making the
music sound INTERESTING!!!!!!!

Sure, the RELATIVE HARMONICS are the same, but I'd define this
as "harmonic quality loss".

Sorry for the misunderstanding!

<<<Obviously the action is over in a fraction of the time if it is sped up
and so a decently long recording is required before it is sped up (but
this can be done at 1000 samples per second or less if you want.>>>

How true, how true!!!

---I will be in touch,

Sarn.