Output rate - Printable Version +- Moode Forum (https://moodeaudio.org/forum) +-- Forum: moOde audio player (https://moodeaudio.org/forum/forumdisplay.php?fid=3) +--- Forum: Support (https://moodeaudio.org/forum/forumdisplay.php?fid=7) +--- Thread: Output rate (/showthread.php?tid=1667) Pages:
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RE: Output rate - jmgtierrez - 10-04-2019 (10-04-2019, 06:30 AM)adrii Wrote: Hi Juan Manuel You are right!! it was a problem of the directory The results of ./alsa-capabilities are: pi@moode3C:~ $ ./alsa-capabilities 1) Analog output interface hw:0,0 (or hw:ALSA,0) - card name = ALSA - card label = bcm2835 ALSA - interface name = bcm2835 ALSA - usb audio class = (n/a) - character device = /dev/snd/pcmC0D0p - encoding formats = U8, S16_LE - monitor file = /proc/asound/card0/pcm0p/sub0/hw_params - stream file = (n/a) 2) Digital output interface hw:0,1 (or hw:ALSA,1) - card name = ALSA - card label = bcm2835 ALSA - interface name = bcm2835 IEC958/HDMI - usb audio class = (n/a) - character device = /dev/snd/pcmC0D1p - encoding formats = S16_LE - monitor file = /proc/asound/card0/pcm1p/sub0/hw_params - stream file = (n/a) 3) Digital output interface hw:0,2 (or hw:ALSA,2) - card name = ALSA - card label = bcm2835 ALSA - interface name = bcm2835 IEC958/HDMI1 - usb audio class = (n/a) - character device = /dev/snd/pcmC0D2p - encoding formats = S16_LE - monitor file = /proc/asound/card0/pcm2p/sub0/hw_params - stream file = (n/a) 4) Digital USB Audio Class output interface hw:1,0 (or hw:C20,0) - card name = C20 - card label = Cambridge Audio USB Audio 2.0 - interface name = USB Audio - usb audio class = 2 - isochronous asynchronous - character device = /dev/snd/pcmC1D0p - encoding formats = S32_LE - monitor file = /proc/asound/card1/pcm0p/sub0/hw_params - stream file = /proc/asound/card1/stream0 Any idea about the cause of the problem? Thanks Best regards Juan Manuel RE: Output rate - Tim Curtis - 10-04-2019 Your DAC is reporting to Linux/ALSA that it only accepts S32_LE (32-bit) word length over the USB interface. This is common with many high speed USB receiver chipsets. Other chips in your audio device may require 24-bit word length. In this case the firmware in your device will simply strip off the zero-padding from the 32-bit frames. You may want to forward the also-capabilities report to the manufacturer of your DAC and ask them about the particular USB receiver chipset they use. |