pub const MASTER_HZ: u64 = 187_500_000;Expand description
The canonical master clock (MASTER_HZ, ADR 0006), duplicated here because
the chip-crate graph forbids rustyn64-audio depending on rustyn64-core.
The DAC period (master ticks per output sample) is MASTER_HZ / sample_rate.
A cross-crate test in rustyn64-core asserts this equals the scheduler’s
MASTER_HZ, so the two cannot drift.