Defining the name of a dsp.AudioRecorder input

Hey,

I have an external sound card I would like to sample from using Matlab.

Using

adev_info=audiodevinfo

I can see 2 inputs.

adev_info.input.Name

Gives me

ans =

Primary Sound Capture Driver (Windows DirectSound)

ans =

Line (2- SB X-Fi Surround 5.1) (Windows DirectSound)

Therefore I assume the name when calling dsp.AudioRecorder should be "Line (2- SB X-Fi Surround 5.1) (Windows DirectSound)" But I get an error saying,

Error using matlab.system.StringSet/findMatch (line 58)
Line (2- SB X-Fi Surround 5.1) (Windows DirectSound) is
not a valid setting for the DeviceName property.

Answer 1

[Matt Cohen]

Hi Matt,

I understand that you are encountering an issue when trying to assign a device by its name to a dsp.AudioRecorder object.

I think the issue here is due to potential differences in naming convention between the output from "audiodevinfo" and the valid values of the dsp.AudioRecorder object's 'DeviceName' property for your computer. The dsp.AudioRecorder object expects a slightly truncated version of the device's name for some devices. For example, the Windows DirectSound portion of the device's name likely is not included as an expected portion of an input device's name.

In your example, try using 'Line (2- SB X-Fi Surround 5.1)' instead of the full name. Also, as mentioned in the documentation for the dsp.AudioRecorder object :

"You can use tab completion to query valid 'DeviceName' assignments for your computer by typing H.DeviceName = ' into the MATLAB command window and then pressing the tab key. The tab completion functionality shows all valid audio device names for your computer."

You can create an empty dsp.AudioRecorder object and use the tab completion process to determine the valid format for the device names.

I hope this helps.

Matt Cohen

[Ashwini Srivastava]

Thx. It was helpful. I was able to select the recording device. I was using multiple microphone arrays.