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Add a version of util::midi_note_to_freq for f32

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Robbert van der Helm 2022-11-12 01:01:39 +01:00
parent 761f0b0a80
commit 5330a7d938
1 changed files with 8 additions and 1 deletions
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9
src/util.rs
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@ -47,7 +47,14 @@ pub fn gain_to_db(gain: f32) -> f32 {
/// Convert a MIDI note ID to a frequency at A4 = 440 Hz equal temperament and middle C = note 60 =
/// C4.
pub fn midi_note_to_freq(note: u8) -> f32 {
2.0f32.powf((note as f32 - 69.0) / 12.0) * 440.0
f32_midi_note_to_freq(note as f32)
}
/// The same as [`midi_note_to_freq()`], but for arbitrary note numbers including those outside of
/// the MIDI range. This also supports fractional note numbers, which is useful when working with
/// cents.
pub fn f32_midi_note_to_freq(note: f32) -> f32 {
2.0f32.powf((note - 69.0) / 12.0) * 440.0
}
#[cfg(test)]