len max-len min :> len'
pcm #channels void* <c-direct-array> :> channel*s
- len' iota [| sample |
- #channels iota [| channel |
+ len' <iota> [| sample |
+ #channels <iota> [| channel |
channel channel*s nth len c:float <c-direct-array>
sample swap nth
float>short-sample short-buffer push