Hack

Thi application technically behaves (and I hear it) like a hack between iTunes -added distortion and my digital USB port. In fact, it makes the job AFTER iTunes does bad "analog" (floating point) magic with digital sound. This is really hack… indeed, bad sound of iTunes is not related to driver between iTunes and Audio equipment.

Listen to Decibel… much better, and you have separate controls for digital volume and analog volume. Even free Songbird has separate control for digital volume.

BitPerfect has something like separate audio control… which doesnt work with my USB output and Grace m903 amplifier.

Bambarbia about BitPerfect, v1.0.3