diff --git a/readme.md b/readme.md
index 63ca38a..b3ff5a3 100644
--- a/readme.md
+++ b/readme.md
@@ -112,3 +112,36 @@ The example files (from the Examples directory) are
 24.  TestInputOutput_float
 
 28.  Tympan_TLV320AIC3206
+
+WORKING NOTES - For now, here are some temporary notes:
+---------------
+1.  synth_sine_f32.h & .cpp allowed both KINETISK and__IMXRT1062__ to support T4.x.  Tested 3.6, 4.0
+2.  Fix synth_pinknoise_f32.h & .cpp built in I16 to F32. Now T3 and T4.
+3.  Fix synth_whitenoise_f32.cpp to include IMXRT1062  and built in I16 to F32. Now T3 and T4.
+4.  Added Gaussian White Noise F32. This is T3 and T4.
+5.  Renamed 3206 codec to .xxx to stop collisions with Teensy I16 library. Needs work. 
+6.  Added new examples/SignalNoise_float.ino to test white, pink, Gaussian noise and sine. Audio out. 
+7.  Disabled output_i2s_f32.h, .cpp by .xxxfile type. These need rework for T4. Use Convert_F32toI16. 
+8.  Disabled control_tlv320aic3206.h, .cpp by .xxxfile type. These collide with Teensy I16 Audio. 
+9.  Added new analyze_peak_f32.h and .cpp that parallel similar classes in the Teensy I16 library. 
+10.  Added new analyze_rms_f32.h and .cpp that parallel similar classes in the Teensy I16 library. 
+11.  Moved AudioSwitch_F32 from Tympan, added 8-channel version. 
+12.  Added /examples/Switches_float.ino for 4 and 8 channel switches. 
+13.  Moved FFT_Overlapped_F32 files from Tympan, revised for T4.0, added _OA name isolation. 
+14.  Moved Overlapped FFT LPF .INO from Tympan to OA.  Working T3.6 and T4.0 
+15.  Moved Overlapped FFT AudioFormantShifter INO and related from Tympan to _OA Open Audio. Tested 3.6 and 4.0.
+16.  Moved AudioFrequencyShifter INO and related from Tympan to _OA Open Audio. Tested 3.6 and 4.0.
+17.  Working on SdFatWriter and related SdFat files.  DO NOT USE.
+18.  Modified AudioEffectDelay for T4.0.
+19.  Moved in radio function AudioFilter90Deg_F32.
+20.  Moved in radio function RadioIQMixer_F32.
+21.  Added Example INO, FineFreqShift_OA.ino with Hilbert shifter and delay stereo.
+22.  Brought in support stuff mathDSP_F32 and sinTable512_F32.h.
+23.  Brought in AudioAnalyzePhase_F32 and Example
+24.  Brought in AudioFilterEqualyzer_F32 and 2 Example
+25.  Brought in AudioFilterFIRGeneral_F32 and 2 Example INOs
+26.  Brought in RadioFMDetector_F32 and Example
+27.  Brought in synth_sin_cos_F32 and test example
+28.  Brought in RadioNoiseBlanker_F32 and Example
+29.  Created output_i2s_OA_F32.h and .cpp to have F32 input.  Work in Progress, DO NOT USE. Set to .xxx
+30.  Repaired Audio Mixers 4 & 8.  These are adders, NOT RF DBM's---see Multiplier_F32.