A Wavetable is a FloatArray in a special format used by SuperCollider's interpolating oscillators. Wavetables cannot be created by new.
Fill a Wavetable of the given size with a sum of sines at the given amplitudes and phases. The Wavetable will be normalized.
| size |
must be a power of 2. |
| amplitudes |
an Array of amplitudes for each harmonic beginning with the fundamental. |
| phases |
an Array of phases in radians for each harmonic beginning with the fundamental. |
Fill a Wavetable of the given size with a sum of Chebyshev polynomials at the given amplitudes for use in waveshaping by the Shaper ugen.
| size |
must be a power of 2 plus 1, eventual wavetable is next power of two size up. |
| amplitudes |
an Array of amplitudes for each Chebyshev polynomial beginning with order 1. |
| normalize |
a Boolean indicating whether to normalize the resulting Wavetable. If the zeroOffset argument is true, the normalization is done for use as a transfer function, using normalizeTransfer, otherwise it just uses normalize to make the absolute peak value 1. Default is true. |
| zeroOffset |
a Boolean indicating whether to offset the middle of each polynomial to zero. If true, then a zero input will always result in a zero output when used as a waveshaper. If false, then the "raw" (unshifted) Chebyshev polynomials are used. Default is false. |
Plot the Wavetable in a window. The arguments are not required and if not given defaults will be used.
| name |
a String, the name of the window. |
| bounds |
a Rect giving the bounds of the window. |
| minval |
the minimum value in the plot. Defaults to the highest value in the data. |
| maxval |
the maximum value in the plot. Defaults to the lowest value in the data. |
Convert the Wavetable into a Signal.
This strange format is not a standard linear interpolation (integer + frac), but for (integer part -1) and (1+frac)) due to some efficient maths for integer to float conversion in the underlying C code.