Adding a sound wave to a wav file

I have created a wav file using a formula that produces sound, now i want to add another sound wave to the same first created file , how can that be done ?

Answer 1

[Mathieu NOE]

hello

if the two have same sampling frequency, you can add them together like z = wav1 + wav2;

but make sure that the output signal does not exceed the -1 / + 1 range , or apply a correction factor