updated readme a bit

README.md

@@ -2,7 +2,7 @@
 
 ## THIS IS WORK IN PROGRESS REPOSITORY
 
-This repo contains 4 nodes for [ComfyUI](https://github.com/comfyanonymous/ComfyUI) that allows for audio filtering
+This repo contains signal processing nodes for [ComfyUI](https://github.com/comfyanonymous/ComfyUI) that allows for audio filtering
 
 ## Nodes
 
@@ -21,6 +21,11 @@ Original Source Code Here: https://zynaddsubfx.sourceforge.io/doc/PADsynth/PADsy
 - **bandwidth_cents**: bandwidth centers
 - **number_harmonics**: number of harmonics
 - **amplitude_per_harmonic**: amplitude per harmonic as a json, takes as list of amplitudes [0,1,4,...], it's count must match number of harmonics
+- **audios**: audio output one channel per note - use "SignalProcessingMixdown" node after to get single audio with monot channel copies to L and R
+
+### SignalProcessingPadSynthChoir/SignalProcessingPadSynthChoir2
+This node is a synthesiser "PadSynth" based on an algorithm by Nasca Octavian PAUL 
+Original Source Code Here: https://zynaddsubfx.sourceforge.io/doc/PADsynth/PADsynth.htm
 
 ### SignalProcessingFilter :
 This node lets you stretch audio to about 100x it's original speed whil mainting pitch. it's great for making pad sounds:
@@ -29,7 +34,41 @@ This node lets you stretch audio to about 100x it's original speed whil mainting
 - **filter_type**: filter type - "lowpass", "highpass", "bandpass", "bandstop"
 - **q_factor**: weidth of the filter
 
+### SignalProcessingStereoWidening: 
+Simple Stereo Widening Algorithm. May be inspired by this implementation : https://github.com/AudioEmerge/Widener
+
+### SignalProcessingMixdown
+mixdown outputs from PadSynths with volume control per note
+- **audios**: audios input
+- **audio**: audio output
+
+### SignalProcessingMultiBandEQ
+multi bans EQ with different methods 
+- **audio**: audio input
+- **method**: hann window smoothing, rfft simple fft based eq, subcomp with bass compression
+- **sub_bass**: gain db
+- **bass**: gain db
+- **low_mid**: gain db
+- **mid**: gain db
+- **upper_mid**: gain db
+- **presence**: gain db
+- **brilliance**: gain db
+- **audio**: audio output
+
+### SignalProcessingSpectrogram
+Renders Mel Spectrum Into An Image
+- **audio**: audio input
+- **image**: image output
+
+### SignalProcessingWaveform
+Render Wave Shape Into An Image
+- **audio**: audio input
+- **image**: image output
+
 ### SignalProcessingLoadAudio :
 This node lets you stretch audio to about 100x it's original speed whil mainting pitch. it's great for making pad sounds:
 - **audio_file**: input audio file
-- **seek_seconds**: when to start audio from
+- **seek_seconds**: when to start audio from
+
+### SignalProcessingMultiBandEQExperimental
+just a scratch pad for EQs dev