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Smooth pitch value changes

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This commit is contained in:
Robbert van der Helm 2022-03-07 20:27:43 +01:00
parent 344427f254
commit 9ae8b4620f
1 changed files with 18 additions and 3 deletions
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21
plugins/puberty_simulator/src/lib.rs
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@ -84,6 +84,9 @@ impl Default for PubertySimulatorParams {
center: 0.0,
},
)
// This doesn't need smoothing to prevent zippers because we're already going
// overlap-add, but sounds kind of slick
.with_smoother(SmoothingStyle::Linear(100.0))
.with_unit(" Octaves")
.with_value_to_string(formatters::f32_rounded(2)),
}
@ -131,15 +134,27 @@ impl Plugin for PubertySimulator {
// IDFT operation
const GAIN_COMPENSATION: f32 = 1.0 / OVERLAP_TIMES as f32 / WINDOW_SIZE as f32;
// Negated because pitching down should cause us to take values from higher frequency bins
let frequency_multiplier = 2.0f32.powf(-self.params.pitch_octaves.value);
let sample_rate = context.transport().sample_rate;
let mut smoothed_pitch_value = 0.0;
self.stft.process_overlap_add(
buffer,
&self.window_function,
OVERLAP_TIMES,
|_channel_idx, real_fft_scratch_buffer| {
|channel_idx, real_fft_scratch_buffer| {
// This loop runs whenever there's a block ready, so we can't easily do any post- or
// pre-processing without muddying up the interface. But if this is channel 0, then
// we're dealing with a new block. We'll use this for our parameter smoothing.
if channel_idx == 0 {
smoothed_pitch_value = self
.params
.pitch_octaves
.smoothed
.next_step((WINDOW_SIZE / OVERLAP_TIMES) as u32);
}
// Negated because pitching down should cause us to take values from higher frequency bins
let frequency_multiplier = 2.0f32.powf(-smoothed_pitch_value);
// Forward FFT, the helper has already applied window function
self.plan
.r2c_plan