update manual according to recommendations in #93

doc/manual.md

@@ -37,3 +37,18 @@ Now open the edrumulus.ino file in the Arduino IDE and compile and upload.
 - Start Hairless MIDI and set MIDI Out to EdrumulusIn and MIDI In to EdrumulusOut.
 - Start Python and run `edrumulus/tools/edrumulus_gui.py rtmidi`
 
+
+## How to support new pieces of hardware
+
+1. Start with prototype 2 and optimize the analog circuit. Random testing or a simulation with software like LTSpice could be used.
+3. Analyze the samples in the Octave model to identify the edrumulus parameters:
+   - Attach the pad to a normal sound card and record the strikes with 8 kHz sampling rate and according to https://github.com/corrados/edrumulus/blob/main/doc/algorithm.md#test-signals.
+   - Add the recording to https://github.com/corrados/edrumulus/tree/main/algorithm/signals.
+   - Create a new type in https://github.com/corrados/edrumulus/blob/main/algorithm/signalsandsettings.m and use an
+     initial parameter set from a similar pad as a starting point.
+   - Call the script signalsandsettings.m in Octave which automatically uses the script drumtrigger.m.
+   - Adjust the parameters so that the decay curve looks ok and try to get as little false triggers as possible.
+   - The updated parameters are then used in https://github.com/corrados/edrumulus/blob/main/edrumulus_parameters.cpp.
+   - To get it fully working, the new type has to be added at multiple places, e.g. in the GUI python script, too.
+4. Test the parameters in practice. Modify the available real-time parameters for hopefully better results. Possibly go back to previous steps.
+