Struct Noise 

pub struct Noise { /* private fields */ }

Channel 4’s settings.

The pitch is a clock divider and shift rather than a note, since what comes out is noise and is chosen by ear.

Implementations

impl Noise

pub const fn new(volume: u8, divider: u8, shift: u8) -> Self

Noise at volume, out of 15, clocked at 262144 / (divider << shift) hertz, where a divider of 0 counts as a half.

A volume of 0 is not a quiet sound but a stopped channel: it turns the DAC off, and a channel whose DAC is off will not start.

A shift of 14 or 15 stops the clock, and neither is reachable here.

pub const fn short_lfsr(self) -> Self

Run the shift register seven bits wide, which repeats often enough to carry a pitch.

pub const fn envelope(self, pace: u8, increase: bool) -> Self

Step the volume every pace ticks of a 64 Hz count, up or down.

A pace of 0 holds the volume where Noise::new put it.

pub const fn length(self, ticks: u8) -> Self

Stop the channel after ticks of a 256 Hz count, at most 64.

pub fn play(&self)

Play on channel 4.

Trait Implementations

impl Clone for Noise

fn clone(&self) -> Noise

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Noise

impl Eq for Noise

impl PartialEq for Noise

fn eq(&self, other: &Noise) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Noise