Audio

Audio

Audio, Alsa-Utils Installation

The ALSA Utilities package contains various utilities which are useful for controlling your sound card

root@Minnowboard:~# apt-get install alsa-utils

Audio, Kernel Drivers Tests

Are the sound card drivers being installed correctly?

Connect your USB Audio Device or Camera with built-in Microphone

user@Minnowboard:~$ lsusb
[62450.348474] usb 1-1.4: new full-speed USB device number 8 using xhci_hcd
[62450.437700] usb 1-1.4: New USB device found, idVendor=0d8c, idProduct=013c
[62450.437710] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[62450.437717] usb 1-1.4: Product: USB PnP Sound Device
[62450.437723] usb 1-1.4: Manufacturer: C-Media Electronics Inc.      
[62450.446465] input: C-Media Electronics Inc.       USB PnP Sound Device
as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1.4/1-1.4:1.3/0003:0D8C:013C.0007/input/input14
[62450.501053] hid-generic 0003:0D8C:013C.0007: input,hidraw3: USB HID v1.00 Device
[C-Media Electronics Inc.       USB PnP Sound Device] on usb-0000:00:14.0-1.4/input3

user@Minnowboard:~$ lsusb
...
Bus 001 Device 008: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller

List Capture Hardware Devices

user@Minnowboard:~$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: C525 [HD Webcam C525], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

List Playback Hardware Devices

user@Minnowboard:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
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 2: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

If your soundcard is recognized and the input/inputX device is set then go to "Alsa Utils, Test" section, otherwise keep reading

Audio, Kernel Drivers Enablement

To be written

Audio, Kernel Modules Tests

Looking at the Audio kernel modules, the list could look like this:

user@sayulita:~$ lsmod | grep snd
Module                  Size  Used by
tbd

Audio, Userspace Tests

Use command-line sound recorder and player for ALSA soundcard driver to test your device

user@Minnowboard:~$ arecord -f cd -D plughw:1,0 -d 20 test.wav # Camera Built-In
user@Minnowboard:~$ arecord -f cd -D plughw:2,0 -d 20 test.wav # USB
user@Minnowboard:~$ aplay -D hw:2,0 test.wav # USB
user@Minnowboard:~$ aplay -D hw:0,3 test.wav # HDMI

Issues

http://lists.elinux.org/pipermail/elinux-minnowboard/Week-of-Mon-20150713/001759.html

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