Information about audio device
information about the input and output audio devices on the system.
info = audiodevinfo
the number of input devices on the system if
nDevices = audiodevinfo(
and returns the number of output devices on the system if
audiodevinfo with no inputs to view information about the input and output audio devices on a system.
audiodevinfo returns a structure containing two fields,
info = audiodevinfo
info = struct with fields: input: [1×2 struct] output: [1×4 struct]
The input field contains audio device names, driver used, and device identifiers.
ans = 1×2 struct array with fields: Name DriverVersion ID
Display the information on the first input device.
ans = struct with fields: Name: 'Primary Sound Capture Driver Windows DirectSound ' DriverVersion: 'Windows DirectSound' ID: 0
Display the information on the second input device.
ans = struct with fields: Name: 'HP 4120 Microphone HP 4120 Windows DirectSound ' DriverVersion: 'Windows DirectSound' ID: 1
The values on your system might differ from this example.
View the number of output audio devices on the system, using an IO value of 0 to indicate output.
nDevices = audiodevinfo(0)
nDevices = 4
This example shows three output devices, but your system might vary.
Check if the input audio device identified by the
0, supports a sample rate of
44100 hertz, with
16 bits per sample, and two channels.
support = audiodevinfo(1,0,44100,16,2)
support = logical 1
The input device supports the specified sample rate, number of bits and number of channels. Note that results on your system might vary.
IO— Input or output device
Input or output device, specified as
indicate input, or
0 to indicate output.
ID— Audio device identifier
Audio device identifier, specified as an integer. The device can be an input or output audio device.
Fs— Sample rate
Sample rate, in hertz, specified as a positive scalar.
nBits— Number of bits per sample
Number of bits per sample, specified as a scalar.
nChannels— Number of audio channels
Number of audio channels, specified as
name— Name of input or output device
Name of the input or output audio device, specified as a character vector.
info— Information about audio devices
Information about audio devices, returned as a structure array
containing two fields,
Each field is an array of structures, with each structure containing
information about one of the audio input or output devices on the
system. The individual device structure fields are:
Name — Name of the device,
returned as a character vector.
DriverVersion — Name of
the driver used to communicate with the device, returned as a character
ID — Device identifier,
returned as a scalar.