listAudioDevices

Create a connection to the Raspberry Pi hardware.

raspPiObj = raspberrypi('192.168.1.5','pi','raspberrypi')

rasPiObj = 

  raspberrypi with properties:

    DeviceAddress: '192.168.1.5'
             Port: 22

For more information on raspberrypi, see raspberrypi.

Use the listAudioDevices function. In the function, specify audioType as 'capture'. The function returns a structured array with field names that correspond to the properties of ALSA audio input devices connected to raspPiObj.

devices = raspPiObj.listAudioDevices('capture')

devices = 

  1×2 struct array with fields:

    Name
    Device
    Channels
    BitDepth
    SamplingRate

In this example, the function returns a 1-by-2 array, indicating that two audio input devices are connected to raspPiObj.

View the properties of the first ALSA audio input device.

devices(1)

ans = 

  struct with fields:

          Name: ' bcm2835 - bcm2835 ALSA↵'
        Device: '0,0'
      Channels: {'CHANNELS: [1 2]'}
      BitDepth: {'8-bit integer'  '16-bit integer'}
  SamplingRate: {'8000 48000'} 

Create a connection to the Raspberry Pi hardware.

raspPiObj = raspberrypi('192.168.1.5','pi','raspberrypi')

Use the listAudioDevices function. In the function, specify audioType as 'playback'. The function returns a structured array with field names that correspond to the properties of ALSA audio output devices connected to raspPiObj.

devices = raspPiObj.listAudioDevices('playback')

devices = 

  1×3 struct array with fields:

    Name
    Device
    Channels
    BitDepth
    SamplingRate

In this example, the function returns a 1-by-3 array, indicating that three audio output devices are connected to raspPiObj.

View the properties of the second ALSA audio output device.

devices(2)

ans = 

  struct with fields:

          Name: ' bcm2835 - bcm2835 ALSA↵'
        Device: '0,1'
      Channels: {'CHANNELS: 2'}
      BitDepth: {'8-bit integer'  '16-bit integer'}
  SamplingRate: {'44100 48000'}