Sound clip modulation

[JonnyMcK]

Hello everyone,

I want to modulate a sample of audio with a square wave in Matlab. Any tips on how I could go about it?

Thanks

 

[SomptingGuy]

I'd like to help, but I'm not sure I understand your question. Are you trying to use a square wave as your carrier? If so, how would you like to modulate it: amplitude or frequency (or other)?

 

[JonnyMcK]

I'd either like to frequency modulate it, or simply add the two signals together in a way that I can plot the result and record it to a .wav file.

The main difficulty I'm having is reading the audio in a way that I can perform a simple addition of the two signals.

 

[SomptingGuy]

Maybe I'm missing something here, but it sounds like you just need to wavread() the file, add your (suitably scaled) square wave to it and then wavwrite() it back out again.