snapshot

libraries/audio-tools/examples/examples-dsp/examples-stk/streams-stk-desktop/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.20)
+
+# set the project name
+project(stk_example)
+set (CMAKE_CXX_STANDARD 11)
+set (DCMAKE_CXX_FLAGS "-Werror")
+
+include(FetchContent)
+option(BUILD_SHARED_LIBS "Build using shared libraries" OFF)
+
+FetchContent_Declare(arduino-stk GIT_REPOSITORY "https://github.com/pschatzmann/Arduino-STK.git" )
+FetchContent_GetProperties(arduino-stk)
+if(NOT arduino-stk_POPULATED)
+    FetchContent_Populate(arduino-stk)
+    add_subdirectory(${arduino-stk_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}/arduino-stk)
+endif()
+
+# Build with arduino-audio-tools
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../../.. ${CMAKE_CURRENT_BINARY_DIR}/arduino-audio-tools )
+endif()
+
+# build sketch as executable
+set_source_files_properties(streams-stk-desktop.ino PROPERTIES LANGUAGE CXX)
+add_executable (stk_example streams-stk-desktop.ino)
+
+# set preprocessor defines
+target_compile_definitions(arduino_emulator PUBLIC -DDEFINE_MAIN)
+target_compile_definitions(stk_example PUBLIC -DARDUINO -DIS_DESKTOP)
+target_compile_definitions(arduino-stk PUBLIC -DIS_DESKTOP)
+
+# OS/X might need this setting for core audio
+target_compile_options(portaudio PRIVATE -Wno-deprecated)
+
+# specify libraries
+target_link_libraries(stk_example arduino-stk portaudio arduino_emulator arduino-audio-tools )
+

libraries/audio-tools/examples/examples-dsp/examples-stk/streams-stk-desktop/streams-stk-desktop.ino

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+/**
+ * @file streams-stk-desktop.ino
+ * @brief Build and run on desktop using PortAudio
+ * build with 
+ * - mkdir build
+ * - cd build
+ * - cmake -DCMAKE_BUILD_TYPE=Debug ..
+ * - make
+ * @author Phil Schatzmann
+ * @copyright Copyright (c) 2021
+ */
+
+#include "Arduino.h"
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioSTK.h" // install https://github.com/pschatzmann/Arduino-STK3
+#include "AudioTools/AudioLibs/PortAudioStream.h"
+
+Flute insturment(50);
+STKStream<Instrmnt> in(insturment);
+PortAudioStream out;
+StreamCopy copier(out, in);
+MusicalNotes notes;
+
+float note_amplitude = 0.5;
+static float 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(static_cast<long>(sizeof(notes_array)/sizeof(float)))];
+
+      Serial.print("playing ");
+      Serial.println(freq);
+
+      insturment.noteOn(freq, note_amplitude);
+      timeout = millis()+800;
+      active = false;
+    } else {
+      // silence for 100 ms
+      insturment.noteOff(note_amplitude);
+      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);
+  out.begin(ocfg);
+
+}
+
+void loop() {
+  play();
+  copier.copy();
+}