On Mon, Mar 02, 2015 at 09:45:13PM +0200, Teemu Likonen wrote: > I got a new USB DAC device (digital to analog converter, a "sound card") > and I'm having problems with digital noise. > > Music goes directly to the device without any mixers, like this: > > mplayer -af-clr -ao alsa:device=hw=1.0 -format s32le [...] > > And it plays nicely. But with high-dynamic classical music I need to > turn amplifier's volume up more than usually and it reveals some sort of > digital noise. Here's a short recording of the sound (file size 1.2MB): > > http://koti.kapsi.fi/~dtw/usb-dac-digital-noise.flac > > That's from my Debian 7.8 box. But when I use the DAC device in my > Macbook Air (OS X) and play the same music files, there is no noise. So > I think it must be my Debian software stack or a hardware issue. > > Any ideas about solving this?
The static part could easily be introduced in mixing; check alsamixer that everything non-essential is turned down to zero. The tweedle noise sounds like hardware, though. -dsr- -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20150302201100.gc21...@randomstring.org
