diff --git a/lib/filters.c b/lib/filters.c
index d6a6767..eb024fd 100644
--- a/lib/filters.c
+++ b/lib/filters.c
@@ -129,7 +129,7 @@ void init_compressor(Compressor *compressor, float threshold, float ratio, float
     compressor->attack = attack;
     compressor->release = release;
     compressor->sample_rate = sample_rate;
-    compressor->gainReduction = 0.0f;
+    compressor->gainReduction = 0.0f; // now this will become negative for boost
     compressor->rmsEnv = 0.0f;
     compressor->rmsTime = rmsTime;
 }
@@ -143,23 +143,23 @@ float rms_compress(Compressor *compressor, float sample) {
     float input_db = voltage_to_voltage_db(env);
 
     float targetGR = 0.0f;
-    if(input_db > compressor->threshold) {
+    if(input_db < compressor->threshold) {
         if(compressor->knee > 0.0f) {
-            float delta = input_db - compressor->threshold;
+            float delta = compressor->threshold - input_db;  // positive difference
             if(delta < compressor->knee / 2.0f) {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
+                targetGR = -(1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
             } else {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * delta;
+                targetGR = -(1.0f - 1.0f / compressor->ratio) * delta;
             }
         } else {
-            targetGR = (1.0f - 1.0f / compressor->ratio) * (input_db - compressor->threshold);
+            targetGR = -(1.0f - 1.0f / compressor->ratio) * (compressor->threshold - input_db);
         }
     } else {
         targetGR = 0.0f;
     }
 
     float coeff;
-    if(targetGR > compressor->gainReduction) {
+    if(targetGR < compressor->gainReduction) {
         coeff = expf(-1.0f / (compressor->attack * compressor->sample_rate));
     } else {
         coeff = expf(-1.0f / (compressor->release * compressor->sample_rate));
@@ -172,27 +172,26 @@ float rms_compress(Compressor *compressor, float sample) {
 
 float peak_compress(Compressor *compressor, float sample) {
     float env = fabsf(sample);
-
     float input_db = voltage_to_voltage_db(env);
 
     float targetGR = 0.0f;
-    if(input_db > compressor->threshold) {
+    if(input_db < compressor->threshold) {
         if(compressor->knee > 0.0f) {
-            float delta = input_db - compressor->threshold;
+            float delta = compressor->threshold - input_db;
             if(delta < compressor->knee / 2.0f) {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
+                targetGR = -(1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
             } else {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * delta;
+                targetGR = -(1.0f - 1.0f / compressor->ratio) * delta;
             }
         } else {
-            targetGR = (1.0f - 1.0f / compressor->ratio) * (input_db - compressor->threshold);
+            targetGR = -(1.0f - 1.0f / compressor->ratio) * (compressor->threshold - input_db);
         }
     } else {
         targetGR = 0.0f;
     }
 
     float coeff;
-    if(targetGR > compressor->gainReduction) {
+    if(targetGR < compressor->gainReduction) {
         coeff = expf(-1.0f / (compressor->attack * compressor->sample_rate));
     } else {
         coeff = expf(-1.0f / (compressor->release * compressor->sample_rate));
@@ -218,57 +217,52 @@ void init_compressor_stereo(StereoCompressor *compressor, float threshold, float
 }
 
 float rms_compress_stereo(StereoCompressor *compressor, float l, float r, float *output_r) {
-    float env_l;
-    float env_r;
+    float env_l, env_r;
     float rmsAlpha = 1.0f - exp(-1.0f / (compressor->rmsTime * compressor->sample_rate));
     compressor->rmsEnv = (1.0f - rmsAlpha) * compressor->rmsEnv + rmsAlpha * (l * l);
-    compressor->rmsEnv2 = (1.0f - rmsAlpha) * compressor->rmsEnv + rmsAlpha * (r * r);
+    compressor->rmsEnv2 = (1.0f - rmsAlpha) * compressor->rmsEnv2 + rmsAlpha * (r * r);
     env_l = sqrtf(compressor->rmsEnv);
     env_r = sqrtf(compressor->rmsEnv2);
 
-    float input_db = voltage_to_voltage_db(env_l);
+    float input_db_l = voltage_to_voltage_db(env_l);
     float input_db_r = voltage_to_voltage_db(env_r);
 
-    float targetGR = 0.0f;
-    if(input_db > compressor->threshold) {
+    float targetGR_l = 0.0f;
+    if(input_db_l < compressor->threshold) {
         if(compressor->knee > 0.0f) {
-            float delta = input_db - compressor->threshold;
+            float delta = compressor->threshold - input_db_l;
             if(delta < compressor->knee / 2.0f) {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
+                targetGR_l = -(1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
             } else {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * delta;
+                targetGR_l = -(1.0f - 1.0f / compressor->ratio) * delta;
             }
         } else {
-            targetGR = (1.0f - 1.0f / compressor->ratio) * (input_db - compressor->threshold);
+            targetGR_l = -(1.0f - 1.0f / compressor->ratio) * (compressor->threshold - input_db_l);
         }
     } else {
-        targetGR = 0.0f;
+        targetGR_l = 0.0f;
     }
+
     float targetGR_r = 0.0f;
-    if(input_db_r > compressor->threshold) {
+    if(input_db_r < compressor->threshold) {
         if(compressor->knee > 0.0f) {
-            float delta = input_db_r - compressor->threshold;
+            float delta = compressor->threshold - input_db_r;
             if(delta < compressor->knee / 2.0f) {
-                targetGR_r = (1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
+                targetGR_r = -(1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
             } else {
-                targetGR_r = (1.0f - 1.0f / compressor->ratio) * delta;
+                targetGR_r = -(1.0f - 1.0f / compressor->ratio) * delta;
             }
         } else {
-            targetGR_r = (1.0f - 1.0f / compressor->ratio) * (input_db_r - compressor->threshold);
+            targetGR_r = -(1.0f - 1.0f / compressor->ratio) * (compressor->threshold - input_db_r);
         }
     } else {
         targetGR_r = 0.0f;
     }
 
-    float shared_target_gr;
-    if(targetGR > targetGR_r) {
-        shared_target_gr = targetGR;
-    } else {
-        shared_target_gr = targetGR_r;
-    }
+    float shared_target_gr = (targetGR_l < targetGR_r) ? targetGR_l : targetGR_r;
 
     float coeff;
-    if(shared_target_gr > compressor->gainReduction) {
+    if(shared_target_gr < compressor->gainReduction) {
         coeff = expf(-1.0f / (compressor->attack * compressor->sample_rate));
     } else {
         coeff = expf(-1.0f / (compressor->release * compressor->sample_rate));
@@ -284,49 +278,45 @@ float peak_compress_stereo(StereoCompressor *compressor, float l, float r, float
     float env_l = fabsf(l);
     float env_r = fabsf(r);
 
-    float input_db = voltage_to_voltage_db(env_l);
+    float input_db_l = voltage_to_voltage_db(env_l);
     float input_db_r = voltage_to_voltage_db(env_r);
 
-    float targetGR = 0.0f;
-    if(input_db > compressor->threshold) {
+    float targetGR_l = 0.0f;
+    if(input_db_l < compressor->threshold) {
         if(compressor->knee > 0.0f) {
-            float delta = input_db - compressor->threshold;
+            float delta = compressor->threshold - input_db_l;
             if(delta < compressor->knee / 2.0f) {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
+                targetGR_l = -(1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
             } else {
-                targetGR = (1.0f - 1.0f / compressor->ratio) * delta;
+                targetGR_l = -(1.0f - 1.0f / compressor->ratio) * delta;
             }
         } else {
-            targetGR = (1.0f - 1.0f / compressor->ratio) * (input_db - compressor->threshold);
+            targetGR_l = -(1.0f - 1.0f / compressor->ratio) * (compressor->threshold - input_db_l);
         }
     } else {
-        targetGR = 0.0f;
+        targetGR_l = 0.0f;
     }
+
     float targetGR_r = 0.0f;
-    if(input_db_r > compressor->threshold) {
+    if(input_db_r < compressor->threshold) {
         if(compressor->knee > 0.0f) {
-            float delta = input_db_r - compressor->threshold;
+            float delta = compressor->threshold - input_db_r;
             if(delta < compressor->knee / 2.0f) {
-                targetGR_r = (1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
+                targetGR_r = -(1.0f - 1.0f / compressor->ratio) * (delta * delta) / compressor->knee;
             } else {
-                targetGR_r = (1.0f - 1.0f / compressor->ratio) * delta;
+                targetGR_r = -(1.0f - 1.0f / compressor->ratio) * delta;
             }
         } else {
-            targetGR_r = (1.0f - 1.0f / compressor->ratio) * (input_db_r - compressor->threshold);
+            targetGR_r = -(1.0f - 1.0f / compressor->ratio) * (compressor->threshold - input_db_r);
         }
     } else {
         targetGR_r = 0.0f;
     }
 
-    float shared_target_gr;
-    if(targetGR > targetGR_r) {
-        shared_target_gr = targetGR;
-    } else {
-        shared_target_gr = targetGR_r;
-    }
+    float shared_target_gr = (targetGR_l < targetGR_r) ? targetGR_l : targetGR_r;
 
     float coeff;
-    if(shared_target_gr > compressor->gainReduction) {
+    if(shared_target_gr < compressor->gainReduction) {
         coeff = expf(-1.0f / (compressor->attack * compressor->sample_rate));
     } else {
         coeff = expf(-1.0f / (compressor->release * compressor->sample_rate));
diff --git a/src/fm95.c b/src/fm95.c
index 5a2bac2..13e5050 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -377,7 +377,7 @@ int main(int argc, char **argv) {
 
     StereoCompressor comp;
     //                            THRESH RATIO  KNE  MAKE   ATT      REL  RMS
-    init_compressor_stereo(&comp, -2.0f, 8.0f, 2.0f, 12.0f, 0.025f, 0.4f, 0.04f, SAMPLE_RATE);
+    init_compressor_stereo(&comp, -2.0f, 8.0f, 2.0f, 3.0f, 0.025f, 0.4f, 0.04f, SAMPLE_RATE);
     // #endregion
 
     signal(SIGINT, stop);