Function delay_len

perro_source/audio_stack/perro_pawdio/src/dsp.rs:277–281

(sample_rate: usize, channels: usize, seconds: f32)

        let reverb_wet = params
            .reverb_send
            .max(params.reflection * 0.25)
            .clamp(0.0, 1.0);
        // All-dry: the wet mix collapses to a passthrough, so skip the three
        // delay-line read/writes entirely.
        if echo_wet > WET_EPSILON || reverb_wet > WET_EPSILON {
            // Dry source that just turned wet: pick up the lines the worker
            // staged. Only tried on a param-refresh boundary, and never blocks.
            if self.wet.is_none() && self.param_counter == 1 {