Struct Drum 

pub struct Drum {
    pub kind: DrumKind,
    pub kit: DrumKit,
    pub pitch_hz: u16,
    pub tone_ms: u32,
    pub noise_ms: u32,
    pub sweep_cents: u16,
    pub sweep_ms: u32,
    pub noise_percent: u8,
    pub click_percent: u8,
    pub seed: u32,
}

A drum preset with integer, portable controls. Notes transpose pitched components relative to C4; noise filters stay fixed. Envelope times are finite lengths, not exponential time constants. Each trigger resets oscillators, filters and seed. A component shorter than its 1 ms attack (including a one-frame envelope at low sample rates) can be silent. Presets use longer envelopes.

Fields

kind: DrumKind

kit: DrumKit

pitch_hz: u16

Fundamental/metal-bank base at C4, 20..=20000 Hz, clamped below Nyquist.

tone_ms: u32

Tone envelope length, 0..=10000 ms. Zero silences that component.

noise_ms: u32

Noise envelope length, 0..=10000 ms. Clap adds 30 ms for its initial bursts.

sweep_cents: u16

Initial pitch above the base, 0..=4800 cents, falling linearly in cents.

sweep_ms: u32

Time to reach the base pitch, 0..=1000 ms. Zero starts at the base.

noise_percent: u8

Noise blend, 0..=100 percent; the tone receives the complementary amount.

click_percent: u8

A separate 3 ms filtered-noise transient, 0..=100 percent.

seed: u32

Fixed noise seed. Zero maps to one; the chiptune register uses its low 15 bits.

Implementations

impl Drum

pub fn new(kind: DrumKind, kit: DrumKit) -> Self

pub fn validate(&self) -> Result<()>

pub fn duration_ms(&self) -> u32

Finite duration including a clap’s bursts and the click, excluding muted components.

pub fn render(&self, sample_rate: u32, velocity: u8) -> Result<Audio>

Renders one hit at C4, with velocity 0..=127, using band-limited chip tones. This offline convenience allocates its output; score Synth::fill does not.

Trait Implementations

impl Clone for Drum

fn clone(&self) -> Drum

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Drum

impl Debug for Drum

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Drum

impl Hash for Drum

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Drum

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Drum