Input Except Boundaries

If $y(n)$ is an input (audio) signal between -1 and 1, it will have to be:

• offset: so that it is positive:
  $$\textcolor{blue}{y(n) + 1}$$    (range: 0 to 2)$$,$$

• scaled: so that it is in range of wavetable size:
  $$\textcolor{blue}{(y(n) + 1) \times (N-1)/2}$$   $$\mbox{ (range: 0 to $N-1$)}$$$$.$$

Pd's phasor~ is between 0 and 1, so only needs to be scaled by $\textcolor{blue}{N-1}$.

If index exceeds bounds ( $0, ..., N-1$), we may

1. clip the input by substituting 0 or $N-1$ for any integer that is $< 0$, or $>N-1$, respectively.
2. wrap the input around to the end if index $< 0$, or to the beginning if index $>N-1$, creating a circular wavetable.

Problem remains: values are not integers!