Function synfx_dsp::note_to_freq

pub fn note_to_freq(note: f32) -> f32

Converts a midi note (0 to 128) to a frequency

 use synfx_dsp::*;

 assert_eq!(note_to_freq(69.0) as i32, 440);
 assert_eq!(note_to_freq(69.0 + 12.0) as i32, 880);
 assert_eq!(note_to_freq(69.0 - 12.0) as i32, 220);