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Fix the biquad

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Oops.
This commit is contained in:
Robbert van der Helm 2022-02-12 21:11:44 +01:00
parent c99877ec05
commit 2241000c20
1 changed files with 4 additions and 4 deletions
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8
plugins/diopser/src/filter.rs
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@ -47,18 +47,18 @@ impl Default for Biquad {
a2: 0.00, a2: 0.00,
}, },
s1: 0.0, s1: 0.0,
s2: 0.9, s2: 0.0,
} }
} }
} }
impl Biquad { impl Biquad {
/// Process a single sample. /// Process a single sample.
fn process(&mut self, sample: f32) -> f32 { pub fn process(&mut self, sample: f32) -> f32 {
let result = self.coefficients.b0 * sample + self.s1; let result = self.coefficients.b0 * sample + self.s1;
self.s1 = self.s2 + self.coefficients.b1 * sample - self.coefficients.a1 * sample; self.s1 = self.coefficients.b1 * sample - self.coefficients.a1 * result + self.s2;
self.s2 = self.coefficients.b2 * sample - self.coefficients.a2 * sample; self.s2 = self.coefficients.b2 * sample - self.coefficients.a2 * result;
result result
} }