Averaging channel data: stereo2mono

### 15.1.5 Averaging channel data: stereo2mono

The stereo2mono command converts a multichannel audio clip to a single channel audio clip.

- stereo2mono takes one argument:
  A, a multichannel audio clip.
- stereo2mono(A) returns an audio clip with the input channels in A mixed down to a single channel.
  Every sample in the output is the arithmetic mean of the samples at the same position in the input channels.

Example.
Input:

t:=soundsec(3):;
L,R:=sin(2*pi*440*t),sin(2*pi*445*t):;
s:=stereo2mono(createwav([L,R])):;
playsnd(s)

Output: The sound of the single channel of the combination of L and R is played.