diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31d9e18..b8ca5fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to `audioinstruments` are recorded here.
 
 ## Unreleased
 
+## 0.5.1
+
+The final of the 0.5.1 pre-releases below. It requires audiodsp 0.6.13.
+
 ## 0.5.1.dev4
 
 - Acid303 has twelve patches, from Squelch and Screamer to Sub Thump and Zap, and
diff --git a/VERSION b/VERSION
index 5a3585c..4b9fcbe 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5.1.dev4
+0.5.1
diff --git a/lib/audioinstruments/acid303.py b/lib/audioinstruments/acid303.py
index 5389e7f..781dc9d 100644
--- a/lib/audioinstruments/acid303.py
+++ b/lib/audioinstruments/acid303.py
@@ -6,7 +6,7 @@
 NAME = "acid303"
 DISPLAY_NAME = "Acid303"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/bass_pedals.py b/lib/audioinstruments/bass_pedals.py
index ed710ef..2ca9fb2 100644
--- a/lib/audioinstruments/bass_pedals.py
+++ b/lib/audioinstruments/bass_pedals.py
@@ -6,7 +6,7 @@
 NAME = "bass_pedals"
 DISPLAY_NAME = "Bass Pedals"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/clavichord.py b/lib/audioinstruments/clavichord.py
index cace730..d3d12d5 100644
--- a/lib/audioinstruments/clavichord.py
+++ b/lib/audioinstruments/clavichord.py
@@ -6,7 +6,7 @@
 NAME = "clavichord"
 DISPLAY_NAME = "Clavichord"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/combo_organ.py b/lib/audioinstruments/combo_organ.py
index 0703728..35ba77e 100644
--- a/lib/audioinstruments/combo_organ.py
+++ b/lib/audioinstruments/combo_organ.py
@@ -6,7 +6,7 @@
 NAME = "combo_organ"
 DISPLAY_NAME = "ComboOrgan"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/compact_organ.py b/lib/audioinstruments/compact_organ.py
index 38e4c51..c996ebb 100644
--- a/lib/audioinstruments/compact_organ.py
+++ b/lib/audioinstruments/compact_organ.py
@@ -6,7 +6,7 @@
 NAME = "compact_organ"
 DISPLAY_NAME = "Compact Organ"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/duo20.py b/lib/audioinstruments/duo20.py
index f387154..b94bb6d 100644
--- a/lib/audioinstruments/duo20.py
+++ b/lib/audioinstruments/duo20.py
@@ -6,7 +6,7 @@
 NAME = "duo20"
 DISPLAY_NAME = "Duo20"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/duosynth.py b/lib/audioinstruments/duosynth.py
index f74cd88..bddeb65 100644
--- a/lib/audioinstruments/duosynth.py
+++ b/lib/audioinstruments/duosynth.py
@@ -6,7 +6,7 @@
 NAME = "duosynth"
 DISPLAY_NAME = "DuoSynth"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/electric_grand70.py b/lib/audioinstruments/electric_grand70.py
index e4bdd5b..a8e7bf8 100644
--- a/lib/audioinstruments/electric_grand70.py
+++ b/lib/audioinstruments/electric_grand70.py
@@ -6,7 +6,7 @@
 NAME = "electric_grand70"
 DISPLAY_NAME = "ElectricGrand70"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/electric_piano.py b/lib/audioinstruments/electric_piano.py
index e245304..804498b 100644
--- a/lib/audioinstruments/electric_piano.py
+++ b/lib/audioinstruments/electric_piano.py
@@ -6,7 +6,7 @@
 NAME = "electric_piano"
 DISPLAY_NAME = "Electric Piano"
 CATEGORIES = ("Piano",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/electronic_drums5.py b/lib/audioinstruments/electronic_drums5.py
index ece3a51..7186182 100644
--- a/lib/audioinstruments/electronic_drums5.py
+++ b/lib/audioinstruments/electronic_drums5.py
@@ -6,7 +6,7 @@
 NAME = "electronic_drums5"
 DISPLAY_NAME = "ElectronicDrums5"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/hybrid_mono.py b/lib/audioinstruments/hybrid_mono.py
index 4e35fcb..22c8aa3 100644
--- a/lib/audioinstruments/hybrid_mono.py
+++ b/lib/audioinstruments/hybrid_mono.py
@@ -6,7 +6,7 @@
 NAME = "hybrid_mono"
 DISPLAY_NAME = "HybridMono"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/mono101.py b/lib/audioinstruments/mono101.py
index 0db3a7d..b5cc9ee 100644
--- a/lib/audioinstruments/mono101.py
+++ b/lib/audioinstruments/mono101.py
@@ -6,7 +6,7 @@
 NAME = "mono101"
 DISPLAY_NAME = "Mono101"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/mono_one.py b/lib/audioinstruments/mono_one.py
index ee335eb..b666331 100644
--- a/lib/audioinstruments/mono_one.py
+++ b/lib/audioinstruments/mono_one.py
@@ -6,7 +6,7 @@
 NAME = "mono_one"
 DISPLAY_NAME = "MonoOne"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/mono_synth.py b/lib/audioinstruments/mono_synth.py
index f0af5a5..74819c0 100644
--- a/lib/audioinstruments/mono_synth.py
+++ b/lib/audioinstruments/mono_synth.py
@@ -6,7 +6,7 @@
 NAME = "mono_synth"
 DISPLAY_NAME = "Mono Synth"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/patch2600.py b/lib/audioinstruments/patch2600.py
index 9eb6999..ba4cf08 100644
--- a/lib/audioinstruments/patch2600.py
+++ b/lib/audioinstruments/patch2600.py
@@ -6,7 +6,7 @@
 NAME = "patch2600"
 DISPLAY_NAME = "Patch2600"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly106.py b/lib/audioinstruments/poly106.py
index ad4bb1d..db522c6 100644
--- a/lib/audioinstruments/poly106.py
+++ b/lib/audioinstruments/poly106.py
@@ -6,7 +6,7 @@
 NAME = "poly106"
 DISPLAY_NAME = "Poly106"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly5.py b/lib/audioinstruments/poly5.py
index cbec58d..b10b2ff 100644
--- a/lib/audioinstruments/poly5.py
+++ b/lib/audioinstruments/poly5.py
@@ -6,7 +6,7 @@
 NAME = "poly5"
 DISPLAY_NAME = "Poly5"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly6.py b/lib/audioinstruments/poly6.py
index 36cb5a1..ea4bed8 100644
--- a/lib/audioinstruments/poly6.py
+++ b/lib/audioinstruments/poly6.py
@@ -6,7 +6,7 @@
 NAME = "poly6"
 DISPLAY_NAME = "Poly6"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly8.py b/lib/audioinstruments/poly8.py
index c89ab5f..2410f3c 100644
--- a/lib/audioinstruments/poly8.py
+++ b/lib/audioinstruments/poly8.py
@@ -6,7 +6,7 @@
 NAME = "poly8"
 DISPLAY_NAME = "Poly8"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly80.py b/lib/audioinstruments/poly80.py
index 5dfe133..b92cf6d 100644
--- a/lib/audioinstruments/poly80.py
+++ b/lib/audioinstruments/poly80.py
@@ -6,7 +6,7 @@
 NAME = "poly80"
 DISPLAY_NAME = "Poly80"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/polya6.py b/lib/audioinstruments/polya6.py
index 641fff4..88d1160 100644
--- a/lib/audioinstruments/polya6.py
+++ b/lib/audioinstruments/polya6.py
@@ -6,7 +6,7 @@
 NAME = "polya6"
 DISPLAY_NAME = "PolyA6"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/polyxa.py b/lib/audioinstruments/polyxa.py
index 92bed97..5c5a292 100644
--- a/lib/audioinstruments/polyxa.py
+++ b/lib/audioinstruments/polyxa.py
@@ -6,7 +6,7 @@
 NAME = "polyxa"
 DISPLAY_NAME = "PolyXa"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/reed_piano.py b/lib/audioinstruments/reed_piano.py
index a577d5d..5db3639 100644
--- a/lib/audioinstruments/reed_piano.py
+++ b/lib/audioinstruments/reed_piano.py
@@ -6,7 +6,7 @@
 NAME = "reed_piano"
 DISPLAY_NAME = "ReedPiano"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/reed_piano200a.py b/lib/audioinstruments/reed_piano200a.py
index 0ef5962..d235164 100644
--- a/lib/audioinstruments/reed_piano200a.py
+++ b/lib/audioinstruments/reed_piano200a.py
@@ -6,7 +6,7 @@
 NAME = "reed_piano200a"
 DISPLAY_NAME = "Reed Piano 200A"
 CATEGORIES = ("Piano",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm606.py b/lib/audioinstruments/rhythm606.py
index fb2ad24..4b4b372 100644
--- a/lib/audioinstruments/rhythm606.py
+++ b/lib/audioinstruments/rhythm606.py
@@ -6,7 +6,7 @@
 NAME = "rhythm606"
 DISPLAY_NAME = "Rhythm606"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm78.py b/lib/audioinstruments/rhythm78.py
index 0c98e75..0ae9743 100644
--- a/lib/audioinstruments/rhythm78.py
+++ b/lib/audioinstruments/rhythm78.py
@@ -6,7 +6,7 @@
 NAME = "rhythm78"
 DISPLAY_NAME = "Rhythm78"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm808.py b/lib/audioinstruments/rhythm808.py
index 667e2ea..3a37dac 100644
--- a/lib/audioinstruments/rhythm808.py
+++ b/lib/audioinstruments/rhythm808.py
@@ -6,7 +6,7 @@
 NAME = "rhythm808"
 DISPLAY_NAME = "Rhythm808"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm909.py b/lib/audioinstruments/rhythm909.py
index 77e27ff..9271ebd 100644
--- a/lib/audioinstruments/rhythm909.py
+++ b/lib/audioinstruments/rhythm909.py
@@ -6,7 +6,7 @@
 NAME = "rhythm909"
 DISPLAY_NAME = "Rhythm909"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/soundfont.py b/lib/audioinstruments/soundfont.py
index 05d5f09..d2638a2 100644
--- a/lib/audioinstruments/soundfont.py
+++ b/lib/audioinstruments/soundfont.py
@@ -6,7 +6,7 @@
 NAME = "soundfont"
 DISPLAY_NAME = "SoundFont"
 CATEGORIES = ("Sampler",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/soundfont_drums.py b/lib/audioinstruments/soundfont_drums.py
index 3f291d6..ec51dc6 100644
--- a/lib/audioinstruments/soundfont_drums.py
+++ b/lib/audioinstruments/soundfont_drums.py
@@ -6,7 +6,7 @@
 NAME = "soundfont_drums"
 DISPLAY_NAME = "SoundFont Drums"
 CATEGORIES = ("Drum", "Sampler")
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/state_variable_mono.py b/lib/audioinstruments/state_variable_mono.py
index ba36e26..8e1dd5a 100644
--- a/lib/audioinstruments/state_variable_mono.py
+++ b/lib/audioinstruments/state_variable_mono.py
@@ -6,7 +6,7 @@
 NAME = "state_variable_mono"
 DISPLAY_NAME = "StateVariableMono"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/string_ensemble.py b/lib/audioinstruments/string_ensemble.py
index 4284252..82783bd 100644
--- a/lib/audioinstruments/string_ensemble.py
+++ b/lib/audioinstruments/string_ensemble.py
@@ -6,7 +6,7 @@
 NAME = "string_ensemble"
 DISPLAY_NAME = "String Ensemble"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/tonewheel3.py b/lib/audioinstruments/tonewheel3.py
index e1f10b4..addf4af 100644
--- a/lib/audioinstruments/tonewheel3.py
+++ b/lib/audioinstruments/tonewheel3.py
@@ -6,7 +6,7 @@
 NAME = "tonewheel3"
 DISPLAY_NAME = "Tonewheel3"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/vocoder330.py b/lib/audioinstruments/vocoder330.py
index 75802ef..b6af8fa 100644
--- a/lib/audioinstruments/vocoder330.py
+++ b/lib/audioinstruments/vocoder330.py
@@ -6,7 +6,7 @@
 NAME = "vocoder330"
 DISPLAY_NAME = "Vocoder330"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/west_coast_synth.py b/lib/audioinstruments/west_coast_synth.py
index d7fb10d..22f8d90 100644
--- a/lib/audioinstruments/west_coast_synth.py
+++ b/lib/audioinstruments/west_coast_synth.py
@@ -6,7 +6,7 @@
 NAME = "west_coast_synth"
 DISPLAY_NAME = "WestCoastSynth"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.1.dev4"
+VERSION = "0.5.1"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (