diff --git a/README.md b/README.md
index d3dedfe..40ce5be 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,45 @@
 * Picadae Calibration Programs
 
+sudo dnf install python3-devel jack-audio-connection-kit-devel
+
+
+prerequisites:
+pyyaml
+sounddevice
+soundfile
+pthon-rtmidi
+
+export PYTHONPATH=${HOME}/src/picadae/control/app
+python p_ac.py -c p_ac.yml
+
+c 60 60 # caputre note 60 using the full_pulseL[] from the p_ac.yml
+
+
+
+
+
+
+# plot third take of note 60 
+python plot_seq.py ~/temp/p_ac_3_oa/60 p_ac.yml 3
+
+# record a calibration take: CalibrateKeys.start
+uses cfg.full_pulseL[] for the pulse sequence
+use cfg.calibrateArgs.holdDutyPctD{} for hold PWM duty cycle
+
+# obsolete plotting function in calibrate_plot.py
+python calibrate_plot.py ~/temp/p_ac_3_oa/60/2 p_ac.yml 60
+
+
+
+
+
+
+![Plot Seq 1](doc/plot_seq_0.png)
+
+`python plot_seq.py ~/temp/p_ac_3_od/60 p_ac.yml 12`
+
+
+![Multi Plot 1](doc/multi_plot.svg)
+
+plot_seq.py `do_td_multi_plot(inDir,cfg.analysisArgs,[(36,4), (48,2)] )`
+