how can i add a sin wave of 400hz with a wav format audio file of 44100hz in matlab ??

i want to superimpose a sine wave of 400hz with a WAV file of 44100HZ. please tell me the of doing it in matlab

Answer 1

[John Petersen]

44100Hz refers to the sampling rate of the WAV file. Is your sine wave sampled at the same rate but is a 400Hz tone? If so, just multiply the two. If not, then you need to add interpolated points so that the two signals have the same number of points before multiplying.