diff --git a/README.md b/README.md
index 7ebf879..386c6d1 100644
--- a/README.md
+++ b/README.md
@@ -17,23 +17,27 @@ Made with and for:
 
 ### Version history
 **Current:**
-- v4.3 (Aug 8, 2025)
-  - Simplified and balanced equalizer
+- v4.3.1 (Sep 5, 2025)
+  - Single knob changed
 
 Old: (see [old/](old))
+- v4.4 (Aug 9, 2025)
+  - Failed experiment
+- v4.3 (Aug 8, 2025)
+  - Simplified and balanced equalizer
 - v4.2 (Jul 19, 2025)
   - Warmer 4.1, and FIR
   - but personally I prefer 4.1
 - v4.1 (Jun 30, 2025)
   - This time more aggressive EQ, but less bassy
-- v4
+- v4 (May 16, 2025)
   - Even less aggressive EQ, even more bassy
-- v3
+- v3 (Apr 9, 2025)
   - Less aggressive EQ, more bassy
   - Stereo delay reduced
-- v2
+- v2 (Mar 28, 2025)
   TODO
-- v1.5
+- v1.5 (Mar 28, 2025)
   TODO
-- v1
+- v1 (Feb 21, 2025)
   TODO
diff --git a/rev 4.3.json b/old/rev 4.3.json
similarity index 100%
rename from rev 4.3.json
rename to old/rev 4.3.json
diff --git a/old/rev 4.4.json b/old/rev 4.4.json
new file mode 100644
index 0000000..fcb2bdb
--- /dev/null
+++ b/old/rev 4.4.json	
@@ -0,0 +1,225 @@
+{
+    "output": {
+        "bass_enhancer#0": {
+            "amount": -5.0,
+            "blend": 10.0,
+            "bypass": false,
+            "floor": 20.0,
+            "floor-active": true,
+            "harmonics": 3.0,
+            "input-gain": 0.0,
+            "output-gain": 0.0,
+            "scope": 170.0
+        },
+        "blocklist": [],
+        "delay#0": {
+            "bypass": false,
+            "dry-l": -100.0,
+            "dry-r": -100.0,
+            "input-gain": 0.0,
+            "invert-phase-l": false,
+            "invert-phase-r": false,
+            "output-gain": 0.0,
+            "time-l": 0.0,
+            "time-r": 1.5,
+            "wet-l": 0.0,
+            "wet-r": 0.0
+        },
+        "equalizer#1": {
+            "balance": 0.0,
+            "bypass": false,
+            "input-gain": 0.0,
+            "left": {
+                "band0": {
+                    "frequency": 20.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 4.650449464127273,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band1": {
+                    "frequency": 40.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band2": {
+                    "frequency": 70.0,
+                    "gain": -2.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band3": {
+                    "frequency": 80.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band4": {
+                    "frequency": 100.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band5": {
+                    "frequency": 120.0,
+                    "gain": -1.5,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band6": {
+                    "frequency": 150.0,
+                    "gain": -3.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.5,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band7": {
+                    "frequency": 170.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                }
+            },
+            "mode": "FIR",
+            "num-bands": 8,
+            "output-gain": 0.0,
+            "pitch-left": 0.0,
+            "pitch-right": 0.0,
+            "right": {
+                "band0": {
+                    "frequency": 20.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 4.650449464127273,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band1": {
+                    "frequency": 40.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band2": {
+                    "frequency": 70.0,
+                    "gain": -2.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band3": {
+                    "frequency": 80.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band4": {
+                    "frequency": 100.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band5": {
+                    "frequency": 120.0,
+                    "gain": -1.5,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band6": {
+                    "frequency": 150.0,
+                    "gain": -3.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.5,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band7": {
+                    "frequency": 170.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                }
+            },
+            "split-channels": false
+        },
+        "plugins_order": [
+            "equalizer#1",
+            "bass_enhancer#0",
+            "delay#0"
+        ]
+    }
+}
diff --git a/rev 4.3.1.json b/rev 4.3.1.json
new file mode 100644
index 0000000..dd23a1a
--- /dev/null
+++ b/rev 4.3.1.json	
@@ -0,0 +1,225 @@
+{
+    "output": {
+        "bass_enhancer#0": {
+            "amount": -5.0,
+            "blend": 10.0,
+            "bypass": false,
+            "floor": 20.0,
+            "floor-active": true,
+            "harmonics": 3.0,
+            "input-gain": 0.0,
+            "output-gain": 0.0,
+            "scope": 170.0
+        },
+        "blocklist": [],
+        "delay#0": {
+            "bypass": false,
+            "dry-l": -100.0,
+            "dry-r": -100.0,
+            "input-gain": 0.0,
+            "invert-phase-l": false,
+            "invert-phase-r": false,
+            "output-gain": 0.0,
+            "time-l": 0.0,
+            "time-r": 1.5,
+            "wet-l": 0.0,
+            "wet-r": 0.0
+        },
+        "equalizer#1": {
+            "balance": 0.0,
+            "bypass": false,
+            "input-gain": 0.0,
+            "left": {
+                "band0": {
+                    "frequency": 20.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 4.650449464127273,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band1": {
+                    "frequency": 40.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band2": {
+                    "frequency": 65.0,
+                    "gain": -3.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band3": {
+                    "frequency": 80.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band4": {
+                    "frequency": 100.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band5": {
+                    "frequency": 110.0,
+                    "gain": -1.5,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band6": {
+                    "frequency": 160.0,
+                    "gain": -3.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band7": {
+                    "frequency": 170.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                }
+            },
+            "mode": "FIR",
+            "num-bands": 8,
+            "output-gain": 0.0,
+            "pitch-left": 0.0,
+            "pitch-right": 0.0,
+            "right": {
+                "band0": {
+                    "frequency": 20.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 4.650449464127273,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band1": {
+                    "frequency": 40.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band2": {
+                    "frequency": 65.0,
+                    "gain": -3.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band3": {
+                    "frequency": 80.0,
+                    "gain": 0.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band4": {
+                    "frequency": 100.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 2.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                },
+                "band5": {
+                    "frequency": 110.0,
+                    "gain": -1.5,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band6": {
+                    "frequency": 160.0,
+                    "gain": -3.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Bell",
+                    "width": 4.0
+                },
+                "band7": {
+                    "frequency": 170.0,
+                    "gain": -1.0,
+                    "mode": "RLC (BT)",
+                    "mute": false,
+                    "q": 3.0,
+                    "slope": "x1",
+                    "solo": false,
+                    "type": "Off",
+                    "width": 4.0
+                }
+            },
+            "split-channels": false
+        },
+        "plugins_order": [
+            "equalizer#1",
+            "bass_enhancer#0",
+            "delay#0"
+        ]
+    }
+}