To be used to retrieve errno upon receiving -XMP_ERROR_SYSTEM from
a libxmp function call. Useful when either libxmp or its client is
statically linked to libc.
Closes: https://github.com/libxmp/libxmp/issues/335
Low value in square wave should be 0, not -255. Also fix ramp up waveform
index to 4, and leave 3 as the random waveform.
To check: is ramp up actually used by any format? And is vibrato depth
ok in MOD/S3M/XM? It does seem correct in IT.
Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
The regression test suite is important for development but for end user
tests a simpler check is sufficient.
Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
