diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4653d61..e4f32d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to `audioinstruments` are recorded here.
 
-## Unreleased
+## 0.5.1.dev0
 
 - `audioinstruments.panel`: wrap an instrument in the adapter a control panel
   edits through, with macros, patches, bypass, reload and MIDI changes that
diff --git a/VERSION b/VERSION
index 8f0916f..ebec9e5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.5.0
+0.5.1.dev0
diff --git a/lib/audioinstruments/acid303.py b/lib/audioinstruments/acid303.py
index 8243741..0da6c90 100644
--- a/lib/audioinstruments/acid303.py
+++ b/lib/audioinstruments/acid303.py
@@ -6,7 +6,7 @@
 NAME = "acid303"
 DISPLAY_NAME = "Acid303"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/bass_pedals.py b/lib/audioinstruments/bass_pedals.py
index 357c233..bd9bbf0 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/clavichord.py b/lib/audioinstruments/clavichord.py
index e30154c..9e2e639 100644
--- a/lib/audioinstruments/clavichord.py
+++ b/lib/audioinstruments/clavichord.py
@@ -6,7 +6,7 @@
 NAME = "clavichord"
 DISPLAY_NAME = "Clavichord"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/combo_organ.py b/lib/audioinstruments/combo_organ.py
index 56099cb..51000fa 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/compact_organ.py b/lib/audioinstruments/compact_organ.py
index dba7ddb..a15a5af 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/duo20.py b/lib/audioinstruments/duo20.py
index c1ecf10..2074fce 100644
--- a/lib/audioinstruments/duo20.py
+++ b/lib/audioinstruments/duo20.py
@@ -6,7 +6,7 @@
 NAME = "duo20"
 DISPLAY_NAME = "Duo20"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/duosynth.py b/lib/audioinstruments/duosynth.py
index dae9f32..108b0bb 100644
--- a/lib/audioinstruments/duosynth.py
+++ b/lib/audioinstruments/duosynth.py
@@ -6,7 +6,7 @@
 NAME = "duosynth"
 DISPLAY_NAME = "DuoSynth"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/electric_grand70.py b/lib/audioinstruments/electric_grand70.py
index 4e21be5..abc20a5 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/electric_piano.py b/lib/audioinstruments/electric_piano.py
index ccb8dc1..8cf8436 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/electronic_drums5.py b/lib/audioinstruments/electronic_drums5.py
index 980c583..482acd5 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/hybrid_mono.py b/lib/audioinstruments/hybrid_mono.py
index a01798a..ed52142 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/mono101.py b/lib/audioinstruments/mono101.py
index ae5de99..a95ffbd 100644
--- a/lib/audioinstruments/mono101.py
+++ b/lib/audioinstruments/mono101.py
@@ -6,7 +6,7 @@
 NAME = "mono101"
 DISPLAY_NAME = "Mono101"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/mono_one.py b/lib/audioinstruments/mono_one.py
index 5634968..3d1e567 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/mono_synth.py b/lib/audioinstruments/mono_synth.py
index f650b20..1825788 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/patch2600.py b/lib/audioinstruments/patch2600.py
index 27481ad..367a7a3 100644
--- a/lib/audioinstruments/patch2600.py
+++ b/lib/audioinstruments/patch2600.py
@@ -6,7 +6,7 @@
 NAME = "patch2600"
 DISPLAY_NAME = "Patch2600"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly106.py b/lib/audioinstruments/poly106.py
index 82d061c..616a1c5 100644
--- a/lib/audioinstruments/poly106.py
+++ b/lib/audioinstruments/poly106.py
@@ -6,7 +6,7 @@
 NAME = "poly106"
 DISPLAY_NAME = "Poly106"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly5.py b/lib/audioinstruments/poly5.py
index 13e8724..a8a1bba 100644
--- a/lib/audioinstruments/poly5.py
+++ b/lib/audioinstruments/poly5.py
@@ -6,7 +6,7 @@
 NAME = "poly5"
 DISPLAY_NAME = "Poly5"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly6.py b/lib/audioinstruments/poly6.py
index 8d6ad05..ef52e6f 100644
--- a/lib/audioinstruments/poly6.py
+++ b/lib/audioinstruments/poly6.py
@@ -6,7 +6,7 @@
 NAME = "poly6"
 DISPLAY_NAME = "Poly6"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly8.py b/lib/audioinstruments/poly8.py
index 4ba024e..602ef36 100644
--- a/lib/audioinstruments/poly8.py
+++ b/lib/audioinstruments/poly8.py
@@ -6,7 +6,7 @@
 NAME = "poly8"
 DISPLAY_NAME = "Poly8"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/poly80.py b/lib/audioinstruments/poly80.py
index 471be72..8b82b72 100644
--- a/lib/audioinstruments/poly80.py
+++ b/lib/audioinstruments/poly80.py
@@ -6,7 +6,7 @@
 NAME = "poly80"
 DISPLAY_NAME = "Poly80"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/polya6.py b/lib/audioinstruments/polya6.py
index 3c3e94d..615c789 100644
--- a/lib/audioinstruments/polya6.py
+++ b/lib/audioinstruments/polya6.py
@@ -6,7 +6,7 @@
 NAME = "polya6"
 DISPLAY_NAME = "PolyA6"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/polyxa.py b/lib/audioinstruments/polyxa.py
index f8d594f..7bb1d16 100644
--- a/lib/audioinstruments/polyxa.py
+++ b/lib/audioinstruments/polyxa.py
@@ -6,7 +6,7 @@
 NAME = "polyxa"
 DISPLAY_NAME = "PolyXa"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/reed_piano.py b/lib/audioinstruments/reed_piano.py
index 824dce3..42d67c8 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/reed_piano200a.py b/lib/audioinstruments/reed_piano200a.py
index e58eba0..98cf3ad 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm606.py b/lib/audioinstruments/rhythm606.py
index e3bf0ab..45bd1c1 100644
--- a/lib/audioinstruments/rhythm606.py
+++ b/lib/audioinstruments/rhythm606.py
@@ -6,7 +6,7 @@
 NAME = "rhythm606"
 DISPLAY_NAME = "Rhythm606"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm78.py b/lib/audioinstruments/rhythm78.py
index 5881e1e..76658a4 100644
--- a/lib/audioinstruments/rhythm78.py
+++ b/lib/audioinstruments/rhythm78.py
@@ -6,7 +6,7 @@
 NAME = "rhythm78"
 DISPLAY_NAME = "Rhythm78"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm808.py b/lib/audioinstruments/rhythm808.py
index 22b1950..220c74a 100644
--- a/lib/audioinstruments/rhythm808.py
+++ b/lib/audioinstruments/rhythm808.py
@@ -6,7 +6,7 @@
 NAME = "rhythm808"
 DISPLAY_NAME = "Rhythm808"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/rhythm909.py b/lib/audioinstruments/rhythm909.py
index ce40eff..b35417f 100644
--- a/lib/audioinstruments/rhythm909.py
+++ b/lib/audioinstruments/rhythm909.py
@@ -6,7 +6,7 @@
 NAME = "rhythm909"
 DISPLAY_NAME = "Rhythm909"
 CATEGORIES = ("Drum",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/soundfont.py b/lib/audioinstruments/soundfont.py
index a76ac12..d48543b 100644
--- a/lib/audioinstruments/soundfont.py
+++ b/lib/audioinstruments/soundfont.py
@@ -6,7 +6,7 @@
 NAME = "soundfont"
 DISPLAY_NAME = "SoundFont"
 CATEGORIES = ("Sampler",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/soundfont_drums.py b/lib/audioinstruments/soundfont_drums.py
index 5ac1a46..269f8f8 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/state_variable_mono.py b/lib/audioinstruments/state_variable_mono.py
index c46efc6..6b86087 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/string_ensemble.py b/lib/audioinstruments/string_ensemble.py
index 007cdea..86ef6f1 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/tonewheel3.py b/lib/audioinstruments/tonewheel3.py
index c3656ec..e7263b6 100644
--- a/lib/audioinstruments/tonewheel3.py
+++ b/lib/audioinstruments/tonewheel3.py
@@ -6,7 +6,7 @@
 NAME = "tonewheel3"
 DISPLAY_NAME = "Tonewheel3"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/vocoder330.py b/lib/audioinstruments/vocoder330.py
index 26b7719..c754bb4 100644
--- a/lib/audioinstruments/vocoder330.py
+++ b/lib/audioinstruments/vocoder330.py
@@ -6,7 +6,7 @@
 NAME = "vocoder330"
 DISPLAY_NAME = "Vocoder330"
 CATEGORIES = ("Synth",)
-VERSION = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (
diff --git a/lib/audioinstruments/west_coast_synth.py b/lib/audioinstruments/west_coast_synth.py
index 093a1e0..d7f64e8 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 = "0.5.0"
+VERSION = "0.5.1.dev0"
 VENDOR = "PyDevices"
 
 MACRO_LABELS = (