Where can i find the algorithms I need to do this...

[badman]

I am creating a neural network using sound as input, I need several algorithms to make the sound file manageable.

i need to rectify the signal, then use some kind of envelope/filter to reduce the complexity and vastly reduce the inputs, then finally I need to detect a starting point in the file to remove the unnecessary silennce. I was thinking that anything below a certain dB would be chopped off from the beginning.

Does anyone know where I can find these,, or find out info on these so I can write them myself?

 

[MikeyP]

FWIW Here is the first one

rectified_signal = abs(signal)

M

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Dr Michael F Platten