Enum NoteTable 

pub enum NoteTable {
    Equal,
    ScopeTui,
}

Which pitches NoteTable::hz gives a note.

use rich_ext::dsp::NoteTable;

// E2: 82.41 Hz in equal temperament; scope-tui's octave-0 E, 20.60 Hz,
// doubled twice: 82.4 Hz (as an f32).
assert!((NoteTable::Equal.hz("E2").unwrap() - 82.407).abs() < 0.001);
assert_eq!(NoteTable::ScopeTui.hz("E2"), Some(f64::from(82.4f32)));
// Without an octave: 4 in equal temperament, 0 in scope-tui's table.
assert_eq!(NoteTable::Equal.hz("A"), Some(440.0));
assert_eq!(NoteTable::ScopeTui.hz("A"), Some(27.5));

Variants

Equal

Equal temperament, A4 at 440 Hz, octave 4 by default: exact (note_hz).

ScopeTui

scope-tui’s table (music.rs, 0.3.5): the twelve pitches of octave 0 rounded to the hundredth of a hertz (C0 16.35, …, B0 30.87), doubled once an octave in f32, octave 0 by default and no octave below it. A clone that divides a sample rate by these pitches picks the buffer sizes scope-tui’s --tune does, sample for sample (about one note in ten is a sample off equal temperament’s).

Implementations

impl NoteTable

pub fn default_octave(self) -> i32

The octave a note without one is in: 4 (Equal) or 0 (ScopeTui).

pub fn hz(self, note: &str) -> Option<f64>

The frequency in Hz of note, written as note_hz reads it, in this table. None when it is not a note (or, in ScopeTui, is below octave 0).

Trait Implementations

impl Clone for NoteTable

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for NoteTable

impl Debug for NoteTable

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

Formats the value using the given formatter.

impl Default for NoteTable

fn default() -> Self

Returns the “default value” for a type.

impl Eq for NoteTable

impl Hash for NoteTable

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 NoteTable

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for NoteTable