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division by 0 avoid

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This commit is contained in:
Dimas Leenman 2022-07-24 12:37:56 +02:00
parent 8bb075e23e
commit 2bd22fd731
1 changed files with 6 additions and 3 deletions
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9
src/dsp/node_formant.rs
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@ -72,8 +72,11 @@ impl DspNode for Formant {
let carrier_center = attack_freq / (attack_freq + decay_freq);
// where they meet in amplitude
let carrier_lowest_amplitude =
(-(std::f32::consts::PI * carrier_center * decay_freq) / base_freq).exp();
let carrier_lowest_amplitude = if carrier_center * decay_freq > base_freq * 2.0 {
0.0
} else {
(-(std::f32::consts::PI * carrier_center * decay_freq) / base_freq).exp()
};
// make a triangle wave, with the peak at carrier center
let carrier_base =
@ -92,7 +95,7 @@ impl DspNode for Formant {
let freq_b = freq_a + 1.0;
// and how much to lerp between them
let blend = multiple.fract();
let blend = multiple.max(1.0).fract();
// get the true modulator
let modulator = (1.0 - blend) * (std::f32::consts::TAU * self.phase * freq_a).cos()