Formation of audio file(.wav) from a matrix.

How can i convert a simple 3*3 matrix into an audio file of (.wav)

Answer 1

[Rick Nickle]

Thanks Star Strider!

Hemraj, I understood that you were also interested in writing the .WAV file, so I'll add that.

Populate the 3x3 matrix:

M=randn(3)

M = 3×3

-0.7170 -2.0392 -0.5122 1.0327 0.1710 -0.7445 1.5918 -1.4577 0.2902

Set the sample rate:

Fs=48000

Fs = 48000

Normalize the data and put it back into 3x3 (I may missing a good optimization here):

y = reshape(normalize(M(:),'range',[-1 1]),3,3)

y = 3×3

-0.2718 -1.0000 -0.1589 0.6920 0.2174 -0.2869 1.0000 -0.6798 0.2830

Write the data to .wav:

audiowrite('3x3.wav', y, Fs)

Now read it back to test:

[yy, FFs] = audioread('3x3.wav')

yy = 3×3

-0.2718 -1.0000 -0.1590 0.6920 0.2174 -0.2869 1.0000 -0.6798 0.2830

FFs = 48000

We can't actually play back using the sound() function because it only supports 2-channel, so play back the first two:

sound(yy(1:end,[1 2]))

[Star Strider]

My pleasure.

With extremely rare exceptions (this is not one), I delete my un-accepted Answers, so I have here as well.