[sdlsound] alt audio converter

[torbjorn.e.andersson at tietoenator.com]

Frank Ranostaj wrote:

> If I understand you correctly, you didn't get an output out of an simple 
> (no rate change) path. Which one did you tried?

Let me think... It was either signed-to-unsigned or unsigned-to-signed. I
tried both the 8-bit case and one of the 16-bit cases, but I don't remember
the details. I've been busy with another pet project lately, so I didn't
try to figure out if it was a programming error or a user error.

Torbjörn