Failed to open Alsa device "hw:1,0" no such file or directory

[Tim Curtis]

Post output from the cmds below and I'll have a look.

Code:

aplay -l

also-capabilities (run this cmd when playback is stopped)

Code:

pi@moode:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
 Subdevices: 7/7
 Subdevice #0: subdevice #0
 Subdevice #1: subdevice #1
 Subdevice #2: subdevice #2
 Subdevice #3: subdevice #3
 Subdevice #4: subdevice #4
 Subdevice #5: subdevice #5
 Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 IEC958/HDMI [bcm2835 IEC958/HDMI]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 0: ALSA [bcm2835 ALSA], device 2: bcm2835 IEC958/HDMI1 [bcm2835 IEC958/HDMI1]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 2: B20 [BursonAudio USB Audio 2.0], device 0: USB Audio [USB Audio]
 Subdevices: 1/1
 Subdevice #0: subdevice #0

Code:

pi@moode:~ $ 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:2,0 (or hw:B20,0)
- card name         = B20                                                      
- card label        = BursonAudio USB Audio 2.0                                
- interface name    = USB Audio                                                
- usb audio class   = 2 - isochronous asynchronous                            
- character device  = /dev/snd/pcmC2D0p                                        
- encoding formats  = S32_LE, SPECIAL DSD_U32_BE                              
- monitor file      = /proc/asound/card2/pcm0p/sub0/hw_params                  
- stream file       = /proc/asound/card2/stream0

Thank you Tim & Kent!

Hi,

I put your log output in code boxes for readability. Its the 5th button from the right on the toolbar when composing a post.

The log output shows 2 HDMI ports which indicates a Pi-4B but earlier you reported using a a Pi-3B+
http://moodeaudio.org/forum/showthread.p...1#pid13891

Code:

Audio Information
Audio Device
Device: USB audio device
Chip:
Interface: USB
Formats: U8, S16_LE
Platform: Pi-3B+ 1GB v1.3

The log output also shows that your USB DAC has been assigned hw:2,0 by Linux/ALSA. It should be assigned to hw:1,0 by Linux/ALSA but for some reason not obvious to me it is not.
Here is what I see on a Pi-4B with stock moOde and a USB DAC connected. The USB DAC is assigned to hw:1,0 (card1) by Linux/ALSA.

Code:

pi@rp2:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
 Subdevices: 7/7
 Subdevice #0: subdevice #0
 Subdevice #1: subdevice #1
 Subdevice #2: subdevice #2
 Subdevice #3: subdevice #3
 Subdevice #4: subdevice #4
 Subdevice #5: subdevice #5
 Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 IEC958/HDMI [bcm2835 IEC958/HDMI]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 0: ALSA [bcm2835 ALSA], device 2: bcm2835 IEC958/HDMI1 [bcm2835 IEC958/HDMI1]
 Subdevices: 1/1
 Subdevice #0: subdevice #0
card 1: DAC [UAC1 DAC], device 0: USB Audio [USB Audio]
 Subdevices: 1/1
 Subdevice #0: subdevice #0

Code:

pi@rp2:~ $ alsa-capabilities
1: `bcm2835 ALSA' Analog audio output on device bcm2835 ALSA
   -hardware address:               hw:0,0  (or hw:ALSA,0)
   -device label:                   bcm2835 ALSA
   -formats:                        U8, S16_LE
   -usb audio class:                (n/a)
   -streamfile:                     (n/a)
   -character device:               /dev/snd/pcmC0D0p
   -monitor file:                   /proc/asound/card0/pcm0p/sub0/hw_params
2: `bcm2835 IEC958/HDMI' Digital non-UAC audio output on device bcm2835 ALSA
   -hardware address:               hw:0,1  (or hw:ALSA,1)
   -device label:                   bcm2835 ALSA
   -formats:                        S16_LE
   -usb audio class:                (n/a)
   -streamfile:                     (n/a)
   -character device:               /dev/snd/pcmC0D1p
   -monitor file:                   /proc/asound/card0/pcm1p/sub0/hw_params
3: `bcm2835 IEC958/HDMI1' Digital non-UAC audio output on device bcm2835 ALSA
   -hardware address:               hw:0,2  (or hw:ALSA,2)
   -device label:                   bcm2835 ALSA
   -formats:                        S16_LE
   -usb audio class:                (n/a)
   -streamfile:                     (n/a)
   -character device:               /dev/snd/pcmC0D2p
   -monitor file:                   /proc/asound/card0/pcm2p/sub0/hw_params
4: `USB Audio' Digital USB Audio Class audio output on device UAC1 DAC
   -hardware address:               hw:1,0  (or hw:DAC,0)
   -device label:                   UAC1 DAC
   -formats:                        (n/a)
   -usb audio class:                UAC1 (isochronous adaptive)
   -streamfile:                     /proc/asound/card1/stream0
   -character device:               /dev/snd/pcmC1D0p
   -monitor file:                   /proc/asound/card1/pcm0p/sub0/hw_params