split an audio file

Hi everyone, i need your help. I'm a newbie in using matlab, so could you help me code this exercise : " Using reshape to split a file wav into some small files."

Thank you very much if you help me .

[Image Analyst]

Is it monaural or stereo?

[Thanh Vu Phuong]

it's stereo

Answer 1

[Star Strider]

Unless it is absolutely necessary to use reshape, use buffer instead. It is just easier.

It only operates on one vector at a time, and returns a matrix of column vectors (regardless of the original vector orientation), so for a stereo signal, it will be necessary to do this for each column (channel) separately.

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[Thanh Vu Phuong]

Using reshape is obligatory. It's very hard for me

[Star Strider]

The ‘some small files’ requirement is a bit ambiguous.

Choose an integral divisor of the number of rows in the file, then choose that number to be the second argument to reshape (the first is the matrix itself), then go for it!

wavmatrix = [1:20; 21:40]';
newmatrix = reshape(wavmatrix, 10, [])

newmatrix = 10×4

1 11 21 31 2 12 22 32 3 13 23 33 4 14 24 34 5 15 25 35 6 16 26 36 7 17 27 37 8 18 28 38 9 19 29 39 10 20 30 40

The first and second columns are the left channel, and the third and fourth columns are the right channel.

I leave the rest to you!

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[Thanh Vu Phuong]

Thanks a lot. I really appreciate it

[Star Strider]

My pleasure!

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