make the hi-hat pedal stomp parameters adjustable in the GUI with the thres and sense parameters

Author: corrados

edrumulus.cpp

@@ -514,10 +514,7 @@ void Edrumulus::Pad::initialize()
   rim_max_power_low_limit  = ADC_MAX_NOISE_AMPL * ADC_MAX_NOISE_AMPL / 31.0f; // lower limit on detected rim power, 15 dB below max noise amplitude
   x_rim_hist_len           = x_sq_hist_len + rim_shot_window_len;
   cancellation_factor      = static_cast<float> ( pad_settings.cancellation ) / 31.0f; // cancellation factor: range of 0.0..1.0
-  ctrl_history_len         = 10; // (MUST BE AN EVEN VALUE) control history length, use a fixed value
   ctrl_history_len_half    = ctrl_history_len / 2;
-  ctrl_velocity_range_fact = 20.0f; // use a fixed value (TODO make it adjustable)
-  ctrl_velocity_threshold  = 1.0f;  // use a fixed value (TODO make it adjustable)
   max_num_overloads        = 3; // maximum allowed number of overloaded samples until the overload special case is activated
 
   // The ESP32 ADC has 12 bits resulting in a range of 20*log10(2048)=66.2 dB.
@@ -562,6 +559,10 @@ void Edrumulus::Pad::initialize()
   control_threshold = pad_settings.pos_threshold / 31.0f * ( 0.6f * ADC_MAX_RANGE ) + ( 0.1f * ADC_MAX_RANGE );
   control_range     = ( ADC_MAX_RANGE - control_threshold ) * ( 32 - pad_settings.pos_sensitivity ) / 32;
 
+  // hi-hat pedal stomp action parameters
+  ctrl_velocity_range_fact = pow ( 10.0f, pad_settings.velocity_sensitivity / 1.8f / 10.0f );   // linear range of 1..53
+  ctrl_velocity_threshold  = pow ( 10.0f, pad_settings.velocity_threshold / 3.0f / 10.0f ) - 1; // linear range of 0..10
+
   // positional sensing low-pass filter properties
   // moving average cut off frequency approximation according to:
   // https://dsp.stackexchange.com/questions/9966/what-is-the-cut-off-frequency-of-a-moving-average-filter

edrumulus.h

@@ -327,6 +327,7 @@ class Edrumulus
       void sched_init() { init_delay_cnt = init_delay_value; }; // schedule initialization function (for delayed initialization)
       const float      init_delay_value_s = 0.2; // init delay value in seconds
       static const int length_ampmap      = 20;  // maxmimum number of amplification mappings for clipping compensation
+      static const int ctrl_history_len   = 10;  // (MUST BE AN EVEN VALUE) control history length, use a fixed value
 
       // band-pass filter coefficients (they are constant and must not be changed)
       const int   bp_filt_len           = 5;
@@ -447,7 +448,6 @@ const float ADC_noise_peak_velocity_scaling = 1.0f / 6.0f;
       int          midi_note_open;
       int          midi_note_open_rim;
       int          midi_ctrl_ch;
-      int          ctrl_history_len;
       int          ctrl_history_len_half;
       float        ctrl_velocity_threshold;
       float        ctrl_velocity_range_fact;

tools/settings/trigger_settings.txt

@@ -50,8 +50,8 @@
 2,120,0
 2,110,4
 3,102,3
-3,103,5
-3,104,0
+3,103,9
+3,104,20
 3,105,5
 3,106,0
 3,107,12