13 May
2021
13 May
'21
2:59 p.m.
May 13 2021, Fons Adriaensen has written:
...
Mmmmm... I'll let you discover the errors (more
than one)...
Thanks, I did. :) The indices were actually a typo, but the rest was
stupidity by design. :)
...
Now if you want float samples (e.g. to do an FFT) you
need
for (...)
{
int v;
v = (16 * sysex_string [2*i] + sysex_string [2*i+1]) ^ 0x80;
if (v & 0x80) v -= 256; // Sign extension
float_sample [i] = v;
}
This is great! I'd never have gotten this bit about the sign extension.
Is the 0x80 type size specific or would it be the same for converting to
double?
...
May I mention your name in the README of the finished tool? First FFT
and now this!
Best wishes,
Jeanette
--
* Website: http://juliencoder.de - for summer is a state of sound
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And when you say those words
It's the sweetest thing I've ever heard <3
(Britney Spears)