speech signal from Microphone USB
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Daniel Shub on 28 Dec 2011
Depends what you mean by "same time." There is going to be a few milliseconds of latency. I would look at the MATLAB based port audio implementations. There are playrec and pa-wavplay (I am not sure i the latter handles input). My preference is for the audio part of the psychtoolbox http://docs.psychtoolbox.org/PsychPortAudio
Gabriele Bunkheila on 24 Aug 2020
I work at MathWorks and I have just noticed this so I thought I'd drop a note.
I understad from your question that you were looking to process the acquired audio live (aka in "real time", or "in the loop") using a standard sound card. In all such situations we recommend looking first at audioDeviceReader and audioDeviceWriter in Audio Toolbox, which were specifically designed with that use case in mind.
The doc page below should help you get started and it includes a few links to additional resources:https://www.mathworks.com/help/audio/gs/audio-input-and-audio-output.html
Another useful page full with code examples and explanations can be found below:https://www.mathworks.com/help/audio/gs/real-time-audio-in-matlab.html
Thanks and good luck with your project.