Anyone knows what a "DAC filter roll-off" is? 2012-01-10 10:49:05 I recently bought a sound card (Xonar D1). I'm using Linux (3.2.0.) The drivers of the D1 offer a mixer control element titled "DAC Filter" and it has two settings: "Slow Roll-off" and "Fast Roll-off". Does anyone have an idea of that is and what it does?