stk examples

Author: pschatzmann

examples/examples-stk/streams-stk_loop-audiokit/streams-stk_loop-audiokit.ino

@@ -12,38 +12,10 @@
 #include "AudioLibs/AudioKit.h"
 #include "AudioLibs/AudioSTK.h"
 
-MemoryLoop mloop("sinewave.raw", sinewave_raw, sinewave_raw_len);
+MemoryLoop mloop("crashcym.raw", crashcym_raw, crashcym_raw_len);
 STKStream<MemoryLoop> in(mloop);
 AudioKitStream out;
 StreamCopy copier(out, in);
-MusicalNotes notes;
-
-static uint16_t notes_array[] = { // frequencies aleatoric C-scale
-    N_C3, N_D3, N_E3, N_F3, N_G3, N_A3, N_B3,
-    N_C4, N_D4, N_E4, N_F4, N_G4, N_A4, N_B4,
-    N_C5, N_D5, N_E5, N_F5, N_G5, N_A5, N_B5
-};
-
-void play() {
-  static bool active=true;
-  static float freq;
-  static uint64_t timeout;
-
-  if (millis()>timeout){
-    if (active){
-      // play note for 800 ms
-      freq = notes_array[random(sizeof(notes_array)/sizeof(uint16_t))];
-      mloop.setFrequency(freq);
-      timeout = millis()+800;
-      active = false;
-    } else {
-      // silence for 100 ms
-      mloop.setFrequency(0);
-      timeout = millis()+100;
-      active = true;
-    }
-  }
-}
 
 void setup() {
   Serial.begin(115200);
@@ -62,6 +34,5 @@ void setup() {
 }
 
 void loop() {
-  play();
   copier.copy();
-}
+}

examples/examples-stk/streams-stk_sine-audiokit/streams-stk_sine-audiokit.ino

@@ -0,0 +1,70 @@
+/**
+ * @file streams-sine-audiokit.ino
+ * @brief We just use the sine generator from STK
+ * @author Phil Schatzmann
+ * @copyright Copyright (c) 2021
+ */
+
+#include "SD_MMC.h"
+#include "AudioTools.h"
+#include "AudioLibs/AudioSTK.h"
+#include "AudioLibs/AudioKit.h"
+
+SineWave sine;
+STKStream<SineWave> in(sine);
+AudioKitStream out;
+StreamCopy copier(out, in);
+MusicalNotes notes;
+
+float note_amplitude = 0.5;
+static uint16_t notes_array[] = { // frequencies aleatoric C-scale
+    N_C3, N_D3, N_E3, N_F3, N_G3, N_A3, N_B3,
+    N_C4, N_D4, N_E4, N_F4, N_G4, N_A4, N_B4,
+    N_C5, N_D5, N_E5, N_F5, N_G5, N_A5, N_B5
+};
+
+void play() {
+  static bool active=true;
+  static float freq;
+  static uint64_t timeout;
+
+  if (millis()>timeout){
+    if (active){
+      // play note for 800 ms
+      freq = notes_array[random(sizeof(notes_array)/sizeof(uint16_t))];
+
+      Serial.print("playing ");
+      Serial.println(freq);
+
+      sine.setFrequency(freq);
+      timeout = millis()+800;
+      active = false;
+    } else {
+      // silence for 100 ms
+      sine.setFrequency(0);
+      timeout = millis()+100;
+      active = true;
+    }
+  }
+}
+
+void setup() {
+  Serial.begin(115200);
+  AudioLogger::instance().begin(Serial,AudioLogger::Warning);
+
+  // setup input
+  auto icfg = in.defaultConfig();
+  in.begin(icfg);
+
+  // setup output
+  auto ocfg = out.defaultConfig(TX_MODE);
+  ocfg.copyFrom(icfg);
+  ocfg.sd_active = false;
+  out.begin(ocfg);
+
+}
+
+void loop() {
+  play();
+  copier.copy();
+}

src/AudioLibs/AudioSTK.h

@@ -49,7 +49,7 @@ class STKGenerator : public SoundGenerator<T> {
 
         /// Starts the processing
         bool begin(AudioBaseInfo cfg){
-             LOGI(LOG_METHOD);
+            LOGI(LOG_METHOD);
             cfg.logInfo();
             SoundGenerator<T>::begin(cfg);
             max_value = NumberConverter::maxValue(sizeof(T)*8);
@@ -95,7 +95,7 @@ class STKStream : public GeneratedSoundStream<int16_t> {
 
         AudioBaseInfo defaultConfig() {
             AudioBaseInfo info;
-            info.channels = 2;
+            info.channels = 1;
             info.bits_per_sample = 16;
             info.sample_rate = stk::Stk::sampleRate();
             return info;