A bunch of WIP stuff needing cleaning

CMakeLists.txt

@@ -8,6 +8,7 @@ add_subdirectory(external/magic_enum)
 add_subdirectory(external/argparse)
 add_subdirectory(external/log4cxx)
 
+
 file(GLOB_RECURSE sources src/*.cpp src/*.h)
 file(GLOB_RECURSE data resources/*)
 

scripts/raw-to-wav.sh

@@ -0,0 +1,8 @@
+#! /bin/sh
+
+set -eux
+
+input_file="$1"
+output_file="$2"
+
+sox -r 44100 -e signed-integer -b 16 -c 1 ${input_file} ${output_file}

scripts/samples.py

@@ -1,6 +1,6 @@
 #! /usr/bin/env python3
 
-from tones import SQUARE_WAVE
+from tones import SQUARE_WAVE, SINE_WAVE
 from tones.mixer import Mixer
 import csv
 import math
@@ -14,7 +14,8 @@ def frequency_to_midi(frequency):
     f = 440 * 2 ^ (n - 69)/12
     '''
     note = 12 * (math.log(frequency/220)/math.log(2)) + 57
-    return round(note)
+    #return round(note)
+    return note
 
 tones = {}
 with open('tones.csv', newline='') as csvfile:
@@ -26,6 +27,27 @@ for tone in tones:
     print(f"{tone} is MIDI #{frequency_to_midi(tones[tone])}")
 
     mixer = Mixer(44100, 1)
-    mixer.create_track(0, SQUARE_WAVE)
+    mixer.create_track(0, SINE_WAVE)
     mixer.add_tone(0, frequency=tones[tone], duration=1.0)
-    mixer.write_wav(f'samples/{tone}.wav')
+    mixer.write_wav(f'samples/{tone}.wav')
+
+
+mixer = Mixer(44100, 1)
+mixer.create_track(0, SQUARE_WAVE)
+mixer.add_tone(0, frequency=440, duration=1.0)
+mixer.write_wav(f'samples/MIDI-69-square.wav')
+
+mixer = Mixer(44100, 1)
+mixer.create_track(0, SINE_WAVE)
+mixer.add_tone(0, frequency=440, duration=1.0)
+mixer.write_wav(f'samples/MIDI-69-sine.wav')
+
+mixer = Mixer(44100, 1)
+mixer.create_track(0, SQUARE_WAVE)
+mixer.add_tone(0, frequency=261.6256, duration=1.0)
+mixer.write_wav(f'samples/MIDI-60-square.wav')
+
+mixer = Mixer(44100, 1)
+mixer.create_track(0, SINE_WAVE)
+mixer.add_tone(0, frequency=261.6256, duration=1.0)
+mixer.write_wav(f'samples/MIDI-60-sine.wav')

scripts/selcal-detect.py

@@ -14,6 +14,14 @@ with open('tones.csv', newline='') as csvfile:
     for row in reader:
         tones[row['designator']] = float(row['frequency'])
 
+'''
+def freq_of_key(midi_key):
+    return 440.0 * (2 ** ((midi_key - 69)/12))
+
+tones = {}
+for c in range(65, 90):
+    tones[c] = freq_of_key(c)
+'''
 
 # Shamelessly lifted from
 # https://scipy.github.io/old-wiki/pages/Cookbook/ButterworthBandpass
@@ -98,6 +106,14 @@ if __name__ == '__main__':
         line = plot.plot(correlation, pen=pg.mkPen(color=color), fillLevel=0.1, name=tone)
         legend.addItem(line, tone)
 
+        y_max = max(line.getData()[1])  # Maximum y-value
+        x_max = line.getData()[0][np.argmax(line.getData()[1])]  # Corresponding x-coordinate
+
+        label = pg.TextItem(html=f'<div style="text-align: center"><span style="color: #FFFFFF; font-size: 12pt;">{line.opts["name"]}</span></div>', anchor=(0.5, 0.5))
+        plot.addItem(label)
+        label.setPos(x_max, y_max)
+        label.setZValue(100)  # Ensure label is above other items
+
     plot.setLabel('left', 'Signal Correlation')
     plot.setLabel('bottom', 'Time (samples)')
     plot.showGrid(x=True, y=True)

src/main.cpp

@@ -92,6 +92,7 @@ int main(int argc, char** argv) {
 
     Synth synth;
 
+
     auto tunings = getSelcalTunings();
     if (!synth.setTuning(tunings)) {
         LOG4CXX_ERROR(logger, "Failed to set SELCAL tuning on synth");
@@ -127,7 +128,10 @@ int main(int argc, char** argv) {
 
     SELCAL::Code code{parser.get<std::string>("code")};
 
+
     for (auto& group : code.getGroups()) {
+        int midi = static_cast<int>(group[0]);
+        std::cout << "Playing MIDI " << midi << std::endl;
         fluid_synth_noteon(raw_synth, 0, static_cast<int>(group[0]), 127);
         fluid_synth_noteon(raw_synth, 1, static_cast<int>(group[1]), 127);
         std::this_thread::sleep_for(std::chrono::duration<double>(toneDuration));
@@ -137,7 +141,17 @@ int main(int argc, char** argv) {
         std::this_thread::sleep_for(std::chrono::duration<double>(silenceDuration));
     }
 
+    /*
+    for (int i = 65; i < 90; ++i) {
+        fluid_synth_noteon(raw_synth, 0, i, 80); // Soundfont root key is TWELVE OUT??
+        std::this_thread::sleep_for(std::chrono::duration<double>(0.1));
+
+        // Silence between tone groups
+        fluid_synth_all_notes_off(raw_synth, ALL_CHANNELS);
+        std::this_thread::sleep_for(std::chrono::duration<double>(0.01));
+    }*/
+
     // Wait long enough for the full tone to play before tearing down.
     using namespace std::chrono_literals;
-    std::this_thread::sleep_for(500ms);
+    //std::this_thread::sleep_for(500ms);
 }

src/synth.cpp

@@ -14,6 +14,15 @@ Synth::Synth() {
             throw new std::runtime_error("Unable to create fluid synth");
         }
 
+        fluid_settings_setstr(settings, "audio.driver", "file");
+        fluid_settings_setstr(settings, "audio.file.name", "output.raw");
+        fluid_settings_setstr(settings, "audio.file.format", "s16");
+        fluid_settings_setstr(settings, "audio.file.type", "raw");
+        fluid_settings_setnum(settings, "synth.sample-rate", 44100);
+        fluid_settings_setnum(settings, "synth.gain", 1.0);
+        fluid_settings_setint(settings, "synth.chorus.active", 0);
+        fluid_settings_setint(settings, "synth.reverb.active", 0);
+
         adriver = new_fluid_audio_driver(settings, synth);
         if (adriver == nullptr) {
             throw new std::runtime_error("Unable to create audio driver");