any experiences with USB DAC's (on linux)?

[skamp]

How many times does it need to be said: USB 1.1 is NOT limited to 48kHz.

 

[tongson]

Quote:

Originally Posted by skamp /img/forum/go_quote.gif How many times does it need to be said: USB 1.1 is NOT limited to 48kHz.

Thanks for correcting. Which USB 1.1 DACs go up to 96kHz? Know any USB DAC that can go 96kHz using the usbaudio driver?

 

[skamp]

My Edirol UA-4FX can, for one. There are many more.

 

[tot]

As far as I know, the standard streaming audio is only up to 48kHz, and that should work with pretty much anything. Anything higher is a device specific and needs special driver support (I don't know if they are just extensions to the standard streaming or completely different packet format.)

I have also Edirol UA-25 and it works at 96kHz, but in that mode it does not look as a normal usbaudio device to lsusb command.

 

[theeviljesus]

Hi

I use a Trends UD-10.1 under Ubuntu Ubuntu 8.10 "Intrepid Ibex" (also get Rates: 32000, 44100, 48000 as nyc_paramedic already posted)

Had some trouble first getting any output to the Trends (connected to my Yamaha receiver via coax). I just managed it changing the gstreamer settings (in console: gconf-editor) and I created a .asoundrc file for ALSA in my home folder

"aplay -l" gives me this output:
Quote:

card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: default [USB Audio DAC ], device 0: USB Audio [USB Audio] Subdevices: 0/1 Subdevice #0: subdevice #0

my .asoundrc file looks like this:

Quote:

pcm.!default { type hw card "default" } ctl.!default { type hw card "default" }

I use mpd (Music Player Daemon: Music Player Daemon Community Wiki) with this config file (mpd.conf):

Quote:

audio_output { type "alsa" name "default" device "plughw:2,0" #have to change this entry sometimes because the device has not always the same "number" (depends on when it's loaded by Kernel?) }

My question now is wheter I have to change/add something in one of those config files or somewhere else to get bit-perfect output. I also don't want anything in my system to alter the signal - just the most direct connection to my Trends UD-10.1.

Here I found a little info on bit-perfect output ( ALSA select digital audio out (bit-perfect)) - but I'm not sure how to correct it for my system:

Quote:

audio_output { type "alsa" name "SPDIF" device "cards.pcm.iec958" }

I'm actually a linux-newbie so please be patient (it's a miracle I even managed to get any output at all

)

Any input of more experienced linux-users would be much appreciated! (Other comments as well of course)

Thanks!

 

[fameh]

Hotaudios work well too on Linux

 

[gav17]

Corda 3move works well

Quote:

gav7 ~ # cat /proc/asound/card1/stream0 | grep Rates Rates: 32000, 44100, 48000 Rates: 32000, 44100, 48000 gav7 ~ # aplay -l **** List of PLAYBACK Hardware Devices **** ... card 1: PCM2702 [Burr-Brown Japan PCM2702], device 0: USB Audio [USB Audio] Subdevices: 0/1 Subdevice #0: subdevice #0 gav7 ~ # uname -a Linux gav7 2.6.23-sabayon-r1 #1 SMP Fri Nov 23 05:27:12 MSK 2007 i686 Intel(R) Celeron(R) M processor 900MHz GenuineIntel GNU/Linux

 

[suicidal_orange]

Style Audio Carat Peridot here - works fine

Code:

[left]aplay -l **** List of PLAYBACK Hardware Devices **** card 0: default [USB Audio DAC ], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 cat /proc/asound/card0/stream* | grep Rates Rates: 32000, 44100, 48000 Rates: 32000, 44100, 48000[/left]

It's running through a powered hub so no lsusb available (need more USB ports!)

 

[gychang]

I only get this on my TurtleBeach MIcro Advantage USB card (I get occasional clicky noise when playing flac files).

Rates: 48000

anything should be corrected?

gychang

 

[MCC]

My first experience w/ USB audio on Linux was with an old version of Debian. I had severe aliasing issues in the upper frequencies that made it practically unlistenable.

Newer Linux distros (I've also tried it on Ubuntu 8.04) work great without the aforementioned issues.