sine wave glissando from one pitch to another in Numpy

Question

I have been working on a program where I need to slowly and smoothly change the pitch of a sine wave from one pitch to another. I am able to get an array of the frequency the p

Answer 1

I like to think of frequency as the rate at which you are stepping through your sound sample - in this case a sine wave. Here's an attempt at some Python code to do what you want. We assume that the freq() method gives frequency as a function of time. For your purposes, it will be some kind of exponential. We are trying to fill a pre-allocated list called wave.

index = 0
t = 0
while t < len(wave):
  wave[t] = math.sin(2*math.pi*index/sample_rate)
  t = t+1
  index = index + freq(t/sample_rate)

Excuse my Python, I'm still learning the language.