MATLAB: Does Multi Channel Audio with the MOTU UltraLite-mk3 does not work (audioDeviceWriter)

8Audio Toolboxchannelmultispeaker

Why does Multi Channel Audio with my MOTU UltraLite-mk3 does not work (audioDeviceWriter)?

I am using 'DirectSound' as a driver defined in the audioDeviceWriter command:

deviceWriter = audioDeviceWriter('SampleRate',Fs,'BitDepth','16-bit integer','Driver', ...
    'DirectSound','BufferSize',1024,'Device','MOTU Analog (MOTU Audio Wave for 64 bit)');

Best Answer

The correct syntax for this workflow is the following:

deviceWriter = audioDeviceWriter('SampleRate',Fs,'BitDepth','16-bit integer',...
'ChannelMappingSource',"Property",'ChannelMapping',1:8,'BufferSize',1024,...
'Driver','ASIO','Device','MOTU Audio ASIO');

Please use ASIO for multi-channel audio for this device.

Related Solutions

MATLAB: How to add new audio devices after I have already created an object in the Audio System Toolbox

The device information is stored in memory in the same way a MEX file would be, so if you want to add new devices you first need to clear that information from MATLAB's memory. The following example code should allow you to add new devices without restarting MATLAB:

>> deviceReader = audioDeviceReader;
>> devices = getAudioDevices(deviceReader); % shows 4 devices
>> % Add new device
>> clear deviceReader dspAudioDeviceInfo
>> deviceReader = audioDeviceReader;
>> devices = getAudioDevices(deviceReader); % shows 5 devices

Note that you could also accomplish this using the "clear mex" command instead of specifically clearing "dspAudioDeviceInfo".

You can check if "dspAudioDeviceInfo" is currently saved in memory using the following command:

>> [~,X] = inmem

MATLAB: ASIO audio driver with MATLAB 2016a

Axel,

You can continue using ASIO with DSP System Toolbox in R2016a by changing the driver using MATLAB command-line as described in this doc page. For example, the following code will set ASIO driver:

>> setpref('dsp','portaudioHostApi',3)

Going forward, please note that dsp.AudioPlayer and dsp.AudioRecorder are on their path to deprecation and are superceded by the much improved audioDeviceWriter and audioDeviceReader objects.

Best Answer

Related Solutions

MATLAB: How to add new audio devices after I have already created an object in the Audio System Toolbox

MATLAB: ASIO audio driver with MATLAB 2016a

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