diff --git a/.gitmodules b/.gitmodules
index 0edb80e..657acbd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -538,3 +538,6 @@
 [submodule "libraries/drivers/m5paper_epd"]
 	path = libraries/drivers/m5paper_epd
 	url = https://github.com/Freyr86/m5paper_epd.git
+[submodule "libraries/helpers/synthtools"]
+	path = libraries/helpers/synthtools
+	url = https://github.com/todbot/CircuitPython_SynthTools.git
diff --git a/circuitpython_community_library_list.md b/circuitpython_community_library_list.md
index 03f5adf..a85cb1f 100644
--- a/circuitpython_community_library_list.md
+++ b/circuitpython_community_library_list.md
@@ -156,6 +156,7 @@ c* [CircuitPython_RotarySelect](https://github.com/FoamyGuy/CircuitPython_Rotary
 * [CircuitPython SoftKeyboard](https://github.com/FoamyGuy/CircuitPython_SoftKeyboard.git) Soft Keyboard for Touchscreens ([PyPi](https://pypi.org/project/circuitpython-softkeyboard/)) ([Docs](https://circuitpython-softkeyboard.readthedocs.io/en/latest/))
 * [CircuitPython Styles](https://github.com/jposada202020/CircuitPython_styles.git) Library helper to add styles to CircuitPython display functions CircuitPython widgets ([PyPi](https://pypi.org/project/circuitpython-styles)) ([Docs](https://circuitpython-styles.readthedocs.io/en/latest/))
 * [CircuitPython Synthiota](https://github.com/relic-se/CircuitPython_Synthiota) Helper library for the [synthiota board](https://github.com/todbot/synthiota) that provides hardware abstraction. ([Docs](https://circuitpython-synthiota.readthedocs.io/en/latest/))
+* [CircuitPython_SynthTools](https://github.com/todbot/CircuitPython_SynthTools/) Helper library to make synths with synthio. ([Docs](https://circuitpython-synthtools.readthedocs.io/en/latest/))
 * [CircuitPython_SynthVoice](https://github.com/relic-se/CircuitPython_SynthVoice/) Helper library to generate complex synthio voices. ([Docs](https://circuitpython-synthvoice.readthedocs.io/en/latest/))
 * [CircuitPython_TemperatureTools](https://github.com/CedarGroveStudios/CircuitPython_TemperatureTools.git) A collection of Dew Point, Heat Index, and  temperature unit helpers ([Docs](https://github.com/CedarGroveStudios/CircuitPython_TemperatureTools/blob/main/media/pseudo_rtd_cedargrove_temperaturetools.pdf))
 * [CircuitPython_TMIDI](https://github.com/todbot/CircuitPython_TMIDI.git) Alternate CircuitPython MIDI library, inherits from Winterbloom_SmolMIDI ([PyPi](https://pypi.org/project/circuitpython-tmidi/)) ([Docs](https://circuitpython-tmidi.readthedocs.io/en/latest/))
diff --git a/libraries/helpers/synthtools b/libraries/helpers/synthtools
new file mode 160000
index 0000000..8a16a07
--- /dev/null
+++ b/libraries/helpers/synthtools
@@ -0,0 +1 @@
+Subproject commit 8a16a07260f35ed67bd5effa3f7e26a8fa0085b7