diff --git a/dynamics/oneknob.h b/dynamics/oneknob.h
index 16c22e8..7eb52de 100644
--- a/dynamics/oneknob.h
+++ b/dynamics/oneknob.h
@@ -1,6 +1,7 @@
 #pragma once
 #include "audio_math.h"
 #include "rms_detector.h"
+#include <algorithm>
 #include <cmath>
 
 namespace trnr {
@@ -30,6 +31,7 @@ inline float hp_filter_process(hp_filter& f, float x)
 struct oneknob_comp {
 	// params
 	float amount = 0.f;
+	bool multiplied = false;
 
 	// state
 	rms_detector detector;
@@ -38,9 +40,10 @@ struct oneknob_comp {
 	float release_coef;
 	float envelope_level;
 	float sidechain_in;
+	double samplerate;
 };
 
-inline void oneknob_init(oneknob_comp& c, float samplerate, float window_ms)
+inline void oneknob_init(oneknob_comp& c, double samplerate, float window_ms)
 {
 	rms_init(c.detector, samplerate, window_ms);
 	hp_filter_init(c.filter, samplerate);
@@ -48,6 +51,7 @@ inline void oneknob_init(oneknob_comp& c, float samplerate, float window_ms)
 	const float attack_ms = 0.2f;
 	const float release_ms = 150.f;
 
+	c.samplerate = samplerate;
 	c.attack_coef = expf(-1.0f / (attack_ms * 1e-6 * samplerate));
 	c.release_coef = expf(-1.0f / (release_ms * 1e-3 * samplerate));
 	c.envelope_level = -60.f;
@@ -59,11 +63,17 @@ inline void oneknob_process_block(oneknob_comp& c, sample** audio, int frames)
 {
 	const float min_user_ratio = 1.0f;
 	const float max_user_ratio = 20.0f;
-	const float threshold_db = -9.f;
+	const float threshold_db = -12.f;
 
-	const float amount = fmaxf(0.0f, fminf(powf(c.amount, 2.f), 1.0f)); // clamp to [0, 1]
+	const float amount = fmaxf(0.0f, fminf(powf(c.amount, 2.f), 1.0f));
 	float ratio = min_user_ratio + amount * (max_user_ratio - min_user_ratio);
 
+	const float fast_attack = 0.1f;
+	const float slow_attack = 0.6f;
+	const float fast_release = 90.f;
+	const float slow_release = 300.f;
+	const float max_gr = 24.f;
+
 	for (int i = 0; i < frames; ++i) {
 		float rms_value = rms_process<sample>(c.detector, c.sidechain_in);
 		float envelope_in = lin_2_db(fmaxf(fabs(rms_value), 1e-20f));
@@ -89,8 +99,17 @@ inline void oneknob_process_block(oneknob_comp& c, sample** audio, int frames)
 		audio[0][i] *= gain_reduction_lin;
 		audio[1][i] *= gain_reduction_lin;
 
+		// calculate program-dependent attack/release times
+		float norm_gr = std::clamp(gain_reduction_db / max_gr, 0.f, 1.f);
+		float release_ms = fast_release + (slow_release - fast_release) * (1.f - norm_gr);
+		float attack_ms = fast_attack + (slow_attack - fast_attack) * (1.f - norm_gr);
+
+		c.attack_coef = expf(-1.0f / (attack_ms * 1e-6 * c.samplerate));
+		c.release_coef = expf(-1.0f / (release_ms * 1e-3 * c.samplerate));
+
 		// feedback compression
 		float sum = sqrtf(0.5f * (audio[0][i] * audio[0][i] + audio[1][i] * audio[1][i]));
+		if (c.multiplied) sum *= 3.f;
 		c.sidechain_in = hp_filter_process(c.filter, sum);
 	}
 }