how to read an audio file with a function that support code generation for Raspi?

i want to play audio on my Raspi, and i couldnt find a way on how to read an Audio File with a function that supports code generation. Only one exemple is shown in the Documentation about Audio Capture and it did not helped me.

in there a way how to do it, thanks in advance!

[Walter Roberson]

https://www.mathworks.com/help/dsp/ref/dsp.audiofilereader-system-object.html can have code generated -- but that code uses pre-defined dll that are not available for raspberry.

Answer 1

[Walter Roberson]

You can use putFile() to copy the file from the host to the Pi. But once it is there, there is no built-in support from MATLAB to play the file. You will need to system() the play command, or hook in to some appropriate library that exists on the Pi.

One particular audio file player is listed at https://www.makeuseof.com/tag/play-mp3-audio-raspberry-pi/

[Matlab_Beginner]

Thanks for the quick reply, so i cant stream Audio with matlab commands / deployment?

[Walter Roberson]

Note that audioplayer() exists for raspberry pi https://www.mathworks.com/help/supportpkg/raspberrypiio/ref/audioplayer.html and can be deployed.

That does not read from file though.

You might potentially be able to system() a program that reads the audio file and returns its samples -- that you can then play() with the audioplayer .

If you were to write raw sound data instead of an audio file, you could be even more certain of being able to handle it. I do not know at the moment whether fopen() can be deployed to the Pi, but it is worth a try. If so then the process would be to copy binary samples to the Pi, fopen() the file, fread() it, and then audioplayer() play() it.

The difference compared to your original question being that your original question asks to be able to support "audio files" -- which could potentially include a variety of file formats such as .mp3 and .avi and the audio track from H.265 video files, and could potentially include audio files with the same file extension but different encoders.

[Matlab_Beginner]

Thanks u very much, ill try it out!

Answer 2

[Prasanth Sunkara]

Hi,

Have you tried Audio File read block of Simulink Support pacakge? Simulink Support Package offer more features for advanced workflows.

https://in.mathworks.com/help/supportpkg/raspberrypi/ref/audiofileread.html

Thanks