Changing code to work with new Data Acquisition Toolbox

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Lisa Masipa
Lisa Masipa 2020-10-23
评论： Lisa Masipa 2020-10-23
I have been trying to change this code to work with the current version of the DAQ Toolbox but am unable to do it correctly. If anyone is able to help please make some suggestions.
ai = analoginput('winsound'); % create AI object
addchannel(ai,1); % single channel (mono)
Fs = setverify(ai,'samplerate',44100); % sample rate (Hz)
N = 2^ceil(log2(Tmax*Fs)); % buffer size (samples)
ao = analogoutput('winsound'); % create AO object
addchannel(ao,1); % single channel (mono)
ao.SampleRate=Fs; % output Fs same as input

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回答（1 个）

Walter Roberson
Walter Roberson 2020-10-23
winsound drivers are not supported anymore. However with new enough releases, DirectSound is supported
https://www.mathworks.com/help/daq/audio-input-and-output.html
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Walter Roberson
Walter Roberson 2020-10-23
ai = daq("directsound");
ai.Rate = 44100;
chi = addinput(ai,"Audio1",1,"Audio");
ao = daq("directsound");
ai.Rate = 44100;
cho = addoutput(ao,"Audio1",1,"Audio");
At the moment I am not certain if you can create two different sessions to directsound. You might need to instead use a single daq and addinput and addoutput to the one daq -- but if so then you might need to use the operations to read and write simultaneously.
This assumes that you have Good Reason to have used winsound and want the closest equivalent directsound . But if you do not have Good Reason and just wanted to do audio input and output on a Windows machine, then I would recommend that you switch away from using DAQ into using Audio System Toolbox
https://www.mathworks.com/help/audio/ref/audiodevicereader-system-object.html?s_tid=srchtitle
https://www.mathworks.com/help/audio/ref/audiodevicewriter-system-object.html

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