I just got my Vero 4K and it’s running fine so far except my amplifier (Denon PMA-50) does not work up to its abilities (192 kHz / 24-bit) with it (limiting it to 44.1 kHz). It seems, the running kernel is too old to have a specific patch included to fix that. That’s annoying as the better USB performance over the Raspberry Pi was one of the main reasons for purchasing Vero 4K. Playing music via the optical output works fine, but I need the optical inputs of my amplifier for other appliances. Furthermore I would like to permanently connect squeezelite with the USD-DAC-Device of my amplifier instead of sharing it with Kodis Audio Output Channels and avoid blocking.
Here’s some background on the patch/change:
https://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.10.62 (search for “clock source 41 is not valid, cannot use”)
Teac UD-503 / UD-501 – snd-usb-audio patch - Guillaume playground
http://flodotec.se/drupal/node/10
Syslog-Output on Vero 4K:
[ 328.202012] usb 1-2: new high-speed USB device number 2 using xhci-hcd
[ 328.343505] usb 1-2: New USB device found, idVendor=154e, idProduct=1003
[ 328.343618] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 328.343693] usb 1-2: Product: PMA-50
[ 328.343766] usb 1-2: Manufacturer: D & M Holdings Inc.
[ 328.383701] hid-generic 0003:154E:1003.0001: hiddev0,hidraw0: USB HID v1.10 Device [D & M Holdings Inc. PMA-50] on usb-xhci-hcd.0.auto-2/input2
[ 328.464216] usb-audio:2: clock source 41 is not valid, cannot use
[ 328.496360] usb-audio:2: clock source 41 is not valid, cannot use
[ 328.528964] usbcore: registered new interface driver snd-usb-audio
[ 328.867724] audio_dsp: buf=0
[ 328.867738] audio_dsp: IEC958_mode_raw=0
[ 328.867766] audio_dsp: IEC958_mode_codec= 0, IEC958 type 2 CH PCM
[ 328.867771] audio_dsp: last mode 0,now 0
[ 328.882665] aml_spdif_dai: aml_hw_iec958_init,runtime->rate=44100, runtime->channels=2, same source mode(1)
[ 328.882679] aml_spdif_dai: share the same clock
[ 328.882688] aml_audio_hw: IEC958 PCM32
[ 328.882695] hdmitx: audio: aout notify rate 44100
[ 328.882698] hdmitx: audio: aout notify size 32
[ 328.882702] hdmitx: audio: no update
[ 328.882712] aml_snd_m8_card aml_m8_snd.46: i2s/958 same source
[ 328.882876] aml_spdif_dai: aml_hw_iec958_init,runtime->rate=44100, runtime->channels=2, same source mode(1)
[ 328.882883] aml_spdif_dai: share the same clock
[ 328.882890] aml_audio_hw: IEC958 PCM32
[ 328.882895] hdmitx: audio: aout notify rate 44100
[ 328.882899] hdmitx: audio: aout notify size 32
[ 328.882902] hdmitx: audio: no update
[ 328.882910] aml_snd_m8_card aml_m8_snd.46: i2s/958 same source
[ 328.883033] channel count should be 8, we got 2 aborting
[ 328.889055] aml_snd_m8_card aml_m8_snd.46: I2S playback enable
[ 328.889071] aml_snd_m8_card aml_m8_snd.46: IEC958 playback enable
[ 389.259878] aml_snd_m8_card aml_m8_snd.46: I2S playback disable
[ 389.259932] aml_snd_m8_card aml_m8_snd.46: IEC958 playback disable
[ 389.264674] aml_spdif_dai: aml_hw_iec958_init,runtime->rate=44100, runtime->channels=2, same source mode(1)
[ 389.264716] aml_spdif_dai: share the same clock
[ 389.264748] aml_audio_hw: IEC958 PCM32
[ 389.264776] hdmitx: audio: aout notify rate 44100
[ 389.264795] hdmitx: audio: aout notify size 32
[ 389.264813] hdmitx: audio: no update
[ 389.264863] aml_snd_m8_card aml_m8_snd.46: i2s/958 same source
Syslog-Output on Raspberry Pi 3 (Debian GNU/LInux 9 stretch)
[ 1183.217610] usb 1-1.3: new high-speed USB device number 4 using dwc_otg
[ 1183.348508] usb 1-1.3: New USB device found, idVendor=154e, idProduct=1003
[ 1183.348526] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1183.348534] usb 1-1.3: Product: PMA-50
[ 1183.348544] usb 1-1.3: Manufacturer: D & M Holdings Inc.
[ 1183.353623] hid-generic 0003:154E:1003.0001: hiddev0,hidraw0: USB HID v1.10 Device [D & M Holdings Inc. PMA-50] on usb-3f980000.usb-1.3/input2
[ 1183.873156] usbcore: registered new interface driver snd-usb-audio
sok