chop VEX context

Define a custom CHOP operator with a program that edits channel values.

The CHOP context allows users to change values of channels in a CHOP. Each CHOP function works on a single sample of a single channel of a CHOP.

Globals

SR (read-only)	Sample rate for the channel.
S (read-only)	Index of the start of the current channel. This is the index of the first sample.
NC (read-only)	Total number of channels the CHOP will affect.
I (read-only)	Index or sample number of the current channel.
C (read-only)	Channel number for the current channel. When processing multiple channels, this is the index of the channel currently being evaluated.
L (read-only)	Length of the channel (total number of samples).
V	value of the current sample. This variable should be set to the new value by the function. The variable is initialized to the value of the first input’s channels.
E (read-only)	Index of the last sample (end sample).