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Kernel source tree for Raspberry Pi-provided kernel builds. Issues unrelated to the linux kernel should be posted on the community forum at https://forums.raspberrypi.com/
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snd_usb_audio /firmware audio bugg alsa #132

Closed t1ger1 closed 11 years ago

t1ger1 commented 11 years ago

Audio playback to USB DAC only work fine on 32KHz 44.1Khz, but not on 48KHz. When playing 48KHz audio there is popping and disordet sound.

If using odd rate setting in asound.conf "rate 1" , playback can work partly if using, ex folowing config

pcm.!default { type dmix ipc_key 1024 slave { pcm "hw:1" rate 1 } bindings { 0 0 1 1 } }

ctl.dmixer { type hw card 1 }

same result if playing mp3 from sd card, should not be related to USB transfer bug "ethernet card"

I do belewe the is the same problem

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=50&t=18810&p=184956&hilit=alsa+modem#p184956

t1ger1 commented 11 years ago

Hi I have confirm the firmware bug by using both raspbian and arch

Linux pi 3.2.27+ #244 PREEMPT Sat Oct 6 17:26:38 BST 2012 armv6l GNU/Linux Linux pi 3.2.27-10-ARCH+ #1 PREEMPT Fri Oct 5 03:13:45 UTC 2012 armv6l GNU/Linux

Is there any more info to get this assigned

t1ger1 commented 11 years ago

to clearify, it seams that all usb soundcard has problem with 48KHz, regardlingless config or distro with RPI

ghollingworth commented 11 years ago

Audio playback has been significantly improved recently, update and retry (reopen if still evident)

ghost commented 10 years ago

The bug still persists in Raspbian (2013-09-25-wheezy; Linux version 3.6.11+). Sound popping occurs every couple of second when playing 192kHz/24bit sound files via asynchronous USB DAC. 44.1kHz/16bit files play just fine. It seems that some people are also trying to fix that but without much success: http://www.raspyfi.com/raspberry-pi-usb-audio-fix/