Maximum 8 audio interfaces for kernel linux

[lionnet]

Like topic I wrote so anyone know how to change N usb sound for kernel linux or alsa driver( My ubuntu 14.04 and aplay just recognize 6 usb 3d sound, 1 on board and 1 optical on board. Please let me know how to do it. Thanks.

[sysrqer]

I don't really understand your question. When compiling my kernels I'm pretty sure I've seen the option for number of sound cards and I think the default is 32 or something.

[lionnet]

I don't really understand your question. When compiling my kernels I'm pretty sure I've seen the option for number of sound cards and I think the default is 32 or something.

My hardware is 6 usb sound with the same driver chip ( ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller) and 2 sound card on board. When i plug more usb sound (ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller) & type command aplay -l it not detect the index =8 ( only index 0 to 7 ) whatever I want to plug more ...But when I type lsusb , I can see the id usb sound number 8,9,10,...so I think not from kernel because you say 32 is default. Therefore, the problem it is from alsa, so how to do with alsa can run 32 devices.

[Drumfix]

add

Code: Select all

options snd cards_limit=<maximum number of cards you want to use>

at the beginning of your /etc/modprobe.d/alsa.conf

Then restart alsa (or reboot)

[lionnet]

My alsa at /etc/modprobe.d/alsa-base.conf and I put options snd cards_limit=20 at the beginning of this file. But when I use aplay -l. It always show

**** List of PLAYBACK Hardware Devices ****
card 0: Audio [Built-in Audio], device 0: Playback HiFi-0 []
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: Audio [Built-in Audio], device 1: Capture HiFi-1 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Device_1 [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 3: Device_2 [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 4: Device_3 [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 5: Device_4 [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 6: Device_5 [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 7: Device_6 [USB PnP Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0