Function amp_proxy 

pub fn amp_proxy(
    mono: &[f64],
    rate: SampleRate,
    note: &Note,
    others: &[&Note],
) -> Result<Option<LevelTrack>, FilterError>

The amp proxy of note against the notes that sound with it, from TRACK_LEAD before its onset to its end, in dB of the harmonic’s power; None when no harmonic is free.

Errors

Returns a FilterError when a harmonic band reaches the Nyquist frequency.