u32 index;
The index parameter is assigned by AX. AX maintains an array of AX_MAX_VOICES entries, where each entry is of type AXVPB. The index value represents the index of a given voice within this array and does not change for the entire AX session.
When creating an abstraction layer for AX voices, you are encouraged to implement a parallel array, and use the index parameter for fast referencing of voices.
Do not modify this parameter.
03/01/2006 Initial version.