alsa-capabilities is a bash scripts that shows which digital audio formats and sample rates your sound card and USB DA-converter supports on systems running Linux and alsa.
When you want to configure linux for bit perfect audio playback, pulseaudio can get in the way. This article explains how you can disable pulseaudio easily, without breaking your applications and package management. Furthermore the working of pulseaudio and the relationship with alsa is explained.
The June 2010 Stereophile review of the YBA Design WD202 D/A-converter (watch out: flash-only!) is missing pictures of it’s internals. This is a shame, as Lukasz Fikus of Lampizator points out very eloquently. Inspired by him here we go.