add splitter plugin

Author: hollance

README.markdown

@@ -64,6 +64,7 @@ You can find an archived copy of the [original documentation here](https://web.a
 - [RezFilter](RezFilter/): Resonant filter with LFO and envelope follower
 - [RingMod](RingMod/): Simple ring modulator
 - [Shepard](Shepard/): Shepard tone generator
+- [Splitter](Splitter/): Frequency / level crossover for setting up dynamic processing
 - [Stereo](Stereo/): Add artificial width to a mono signal
 - [SubSynth](SubSynth/): Several low frequency enhancement methods
 - [TestTone](TestTone/): Signal generator with pink and white noise, impulses and sweeps
@@ -80,7 +81,6 @@ You can find an archived copy of the [original documentation here](https://web.a
 - Re-Psycho! - Drum loop pitch changer
 - Round Panner - 3D panner
 - SpecMeter
-- Splitter - Frequency / level crossover for setting up dynamic processing
 - Talkbox - High resolution vocoder
 - Thru-Zero Flanger - Classic tape-flanging simulation
 - Tracker - Pitch tracking oscillator, or pitch tracking EQ

Splitter/MDASplitter.jucer

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<JUCERPROJECT id="ngajfW" name="MDASplitter" projectType="audioplug" useAppConfig="0"
+              addUsingNamespaceToJuceHeader="0" jucerFormatVersion="1">
+  <MAINGROUP id="EccBWd" name="MDASplitter">
+    <GROUP id="{ABE95447-F384-E79B-7924-6EF3C4D2A813}" name="Source">
+      <FILE id="S1zHI2" name="PluginProcessor.cpp" compile="1" resource="0"
+            file="Source/PluginProcessor.cpp"/>
+      <FILE id="cGSkrO" name="PluginProcessor.h" compile="0" resource="0"
+            file="Source/PluginProcessor.h"/>
+    </GROUP>
+  </MAINGROUP>
+  <MODULES>
+    <MODULE id="juce_audio_basics" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_audio_devices" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_audio_formats" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_audio_plugin_client" showAllCode="1" useLocalCopy="0"
+            useGlobalPath="1"/>
+    <MODULE id="juce_audio_processors" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_audio_utils" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_core" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_data_structures" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_events" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_graphics" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_gui_basics" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+    <MODULE id="juce_gui_extra" showAllCode="1" useLocalCopy="0" useGlobalPath="1"/>
+  </MODULES>
+  <JUCEOPTIONS JUCE_STRICT_REFCOUNTEDPOINTER="1" JUCE_VST3_CAN_REPLACE_VST2="0"/>
+  <EXPORTFORMATS>
+    <XCODE_MAC targetFolder="Builds/MacOSX">
+      <CONFIGURATIONS>
+        <CONFIGURATION isDebug="1" name="Debug" targetName="MDASplitter"/>
+        <CONFIGURATION isDebug="0" name="Release" targetName="MDASplitter"/>
+      </CONFIGURATIONS>
+      <MODULEPATHS>
+        <MODULEPATH id="juce_audio_basics" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_audio_devices" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_audio_formats" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_audio_plugin_client" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_audio_processors" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_audio_utils" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_core" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_data_structures" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_events" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_graphics" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_gui_basics" path="../../JUCE/modules"/>
+        <MODULEPATH id="juce_gui_extra" path="../../JUCE/modules"/>
+      </MODULEPATHS>
+    </XCODE_MAC>
+  </EXPORTFORMATS>
+</JUCERPROJECT>

Splitter/README.markdown

@@ -0,0 +1,22 @@
+# Splitter
+
+2-way signal splitter. Frequency / level crossover for setting up dynamic processing.
+
+| Parameter | Description |
+| --------- | ----------- |
+| Mode | see below |
+| Frequency | Crossover frequency |
+| Frequency SW | Select crossover output: **LOW** frequencies / **ALL** frequencies / **HIGH** frequencies |
+| Level | Gate threshold |
+| Level SW | Select gate output: **LOW** levels / **ALL** levels / **HIGH** levels |
+| Envelope | Gate envelope speed |
+| Output | Level trim |
+
+This plug-in can split a signal based on frequency or level, for example for producing dynamic effects where only loud drum hits are sent to a reverb. Other functions include a simple "spectral gate" in **INVERSE** mode and a conventional gate and filter for separating drum sounds in **NORMAL** mode.
+
+Modes:
+
+- NORMAL: Output as selected with **Frequency** and **Level** controls
+- INVERSE: Inverse of shown selection (e.g. everything except low frequencies at high level)
+- NORM INV: Left / Right split of above
+- INV NORM: Right / Left split of above