This sets the upper 8 bits of the sample address (bit 16-23). The most significant bit (bit 15) must be set to 1. Keep in mind the bank number is not affected by the sample address.
The bank register address is aligned so that the first register 0x00
affects channel 15, 0x08
channel 0, and so on.
This sets the sample address.
Always set this register when starting sample playback, as this register is also used to track the current position of the sample.