[Alsa-user] USB Sound Card & default device?

[Hans Malissa via Alsa-user]

Hi all,

I just got a new USB sound card (Schiit Fulla 3, 
https://www.schiit.com/products/fulla-1). It works great, and I'm using it to 
play music through CMUS (https://cmus.github.io) on Arch Linux.
However, I can't seem to figure out how to tell ALSA which device to use as a 
default. When the Fulla 3 is not plugged in, I get:

# cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xa111 irq 129

# aplay -l
 List of PLAYBACK Hardware Devices 
card 0: PCH [HDA Intel PCH], device 0: ALC256 Analog [ALC256 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0

# aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
jack
JACK Audio Connection Kit
pulse
PulseAudio Sound Server
default:CARD=PCH
HDA Intel PCH, ALC256 Analog
Default Audio Device
sysdefault:CARD=PCH
HDA Intel PCH, ALC256 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
Front speakers
surround21:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
HDA Intel PCH, HDMI 0
HDMI Audio Output
hdmi:CARD=PCH,DEV=1
HDA Intel PCH, HDMI 1
HDMI Audio Output
hdmi:CARD=PCH,DEV=2
HDA Intel PCH, HDMI 2
HDMI Audio Output
hdmi:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 3
HDMI Audio Output
hdmi:CARD=PCH,DEV=4
HDA Intel PCH, HDMI 4
HDMI Audio Output
usbstream:CARD=PCH
HDA Intel PCH
USB Stream Output

This is just the internal sound card of my laptop. After I plug in the Fulla 3 
on the USB port, I get:

# cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xa111 irq 129
1 [Schiit ]: USB-Audio - I'm Fulla Schiit
Schiit Audio I'm Fulla Schiit at usb-:00:15.0-1, high speed

# aplay -l
 List of PLAYBACK Hardware Devices 
card 0: PCH [HDA Intel PCH], device 0: ALC256 Analog [ALC256 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Schiit [I'm Fulla Schiit], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0

# aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
jack
JACK Audio Connection Kit
pulse
PulseAudio Sound Server
default:CARD=PCH
HDA Intel PCH, ALC256 Analog
Default Audio Device
sysdefault:CARD=PCH
HDA Intel PCH, ALC256 Analog
Default Audio Device
front:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
Front speakers
surround21:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
HDA Intel PCH, ALC256 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
HDA Intel PCH, HDMI 0
HDMI Audio Output
hdmi:CARD=PCH,DEV=1
HDA Intel PCH, HDMI 1
HDMI Audio Output
hdmi:CARD=PCH,DEV=2
HDA Intel PCH, HDMI 2
HDMI Audio Output
hdmi:CARD=PCH,DEV=3
HDA Intel PCH, HDMI 3
HDMI Audio Output
hdmi:CARD=PCH,DEV=4
HDA Intel PCH, HDMI 4
HDMI Audio Output
usbstream:CARD=PCH
HDA Intel PCH
USB Stream Output
default:CARD=Schiit
I'm Fulla Schiit, USB Audio
Default Audio Device
sysdefault:CA

[Alsa-user] sound on Lenovo Yoga C940

[Peter Patel-Schneider]

 I just bought a Lenovo Yoga C940.  It has at least five speakers but only
two of them are working.  It looks as of the C940 has the same issue that
the C930 has, but I don't see any resolution for that machine either.  Both
machines have a Realtek ALC 298.

What's the best way to test out different jack connections with this chip?
I've been trying with hdajackretask but I can't even turn off the speakers
that work.

Thanks,

peter
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Re: [Alsa-user] Using the multi plugin with a device with different number of inputs and outputs

[Clemens Ladisch via Alsa-user]

Francesco Cameli wrote:
> Is there a way to create a multi device using a different input and output 
> channels number?

Only by creating two devices, one for each direction:

pcm.multiES8 {
type asym
playback.pcm {
type multi
...
}
capture.pcm {
type multi
...
}
}


Regards,
Clemens


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[Alsa-user] Using the multi plugin with a device with different number of inputs and outputs

[Francesco Cameli]

Hello everyone,

I am struggling to use my Expert Sleepers ES-8 audio interface together
with my other interface - a Scarlett 2i2 - with the alsa multi plugin.
Considering that the ES-8 has 12 inputs and 16 outputs, I can't seem to
directly state the total number of channels as 28, since this would create
a device with 28 ins and 28 outs, which is not what the ES-8 provides.
While for an interface with the same number of inputs and outputs I can
simply set the channels to the shared number, this doesn't work with
interfaces with a different number of inputs and outputs.

Is there a way to create a multi device using a different input and output
channels number? My .asoundrc currently looks like this:

pcm.multiES8 {
type multi
slaves.a.pcm hw:USB   #My other interface with 2ins/2outs
slaves.a.channels 2

slaves.b.pcm hw:ES8#This device has 12ins/16outs
slaves.b.channels 28 #Any number here fails. I tried 0 to 28.

... bindings here ...
}
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