Hi Jim,

"So with these sample codecs, there is sound distortion and inversion. "

It isn't from the codec itself, just the level of the signal within it.

Do you have the Sheffield 'My Disc' by any chance? It has tracks which would help to determine if this is the clipping issue from the chips being in the wrong format.

If so play track 7 which is a 1kHz test tone recorded at -20dB. It should be clean and sound fine.

Then play track 8 which is a 1kHz test tone recorded at 0dBFS. If this is the wrong format issue this will sound nasty.

The other test that lets you hear this pretty easily is the Stereophile Test CD 2. The channel ID track. The guitar is very close to 0dBFS and doesn't sound right if it is clipping. The channels will also be inverted side to side.

Shawn

.