we already have a minimal begin, it's boot()

src/Arduboy.cpp

@@ -26,27 +26,21 @@ void Arduboy::start() // deprecated
 
 void Arduboy::begin()
 {
-  boot();
+  boot(); // raw hardware
 
+  // utils
   if(pressed(UP_BUTTON)) {
     flashlight();
   }
 
   bootLogo();
 
-  // Audio
-  tunes.initChannel(PIN_SPEAKER_1);
-  tunes.initChannel(PIN_SPEAKER_2);
   audio.begin();
 }
 
-void Arduboy::beginMinimal()
+void Arduboy::beginNoLogo() // deprecated
 {
   boot();
-
-  // Audio
-  tunes.initChannel(PIN_SPEAKER_1);
-  tunes.initChannel(PIN_SPEAKER_2);
   audio.begin();
 }
 

src/Arduboy.h

@@ -41,16 +41,25 @@ public:
    */
   boolean notPressed(uint8_t buttons);
 
-  /// Initializes the hardware
+  /// Initialize hardware, boot logo, boot utilities, etc.
   void begin();
-  /// Initializes the hardware (no logo, no other bootime niceities)
+
+  /// Init hardware, no logo, no boot utilities.
   /**
-   * If you want to build your own customized boot sequence compare
+   * If you really want this functionality going foward we recommend
-   * begin() with beginMinimal() and just add back the things you wish
+   * just call `boot()` directly, then do any other custom init you
-   * to have in your own sequence, leaving out the things you do not
+   * desire before passing control into your main sketch.
-   * desire.
+   *
-  **/
+   * Look at the source for `begin()` and just rip out what you do not
-  void beginMinimal();
+   * need and start there.
+   *
+   * The minimum functionality required is currently:
+   *
+   *     boot() // raw hardware init (from core)
+   *     audio.begin() // if you need audio
+   */
+  void beginNoLogo() __attribute__ ((deprecated("use boot() + custom code instead")));
+
   void start() __attribute__ ((deprecated("use begin() instead")));
 
   /// Scrolls in the Arduboy logo

src/audio/audio.cpp

@@ -43,6 +43,11 @@ bool ArduboyAudio::audio_enabled = false;
 
 void ArduboyAudio::on()
 {
+  // JIT audio init
+  if (_tune_num_chans == 0) {
+    ArduboyTunes::initChannel(PIN_SPEAKER_1);
+    ArduboyTunes::initChannel(PIN_SPEAKER_2);
+  }
   power_timer1_enable();
   power_timer3_enable();
   audio_enabled = true;

src/audio/audio.h

@@ -33,7 +33,7 @@ public:
   // Playtune Functions
 
   /// Assign a timer to an output pin.
-  void initChannel(byte pin);
+  void static initChannel(byte pin);
 
   /// Start playing a polyphonic score.
   void playScore(const byte *score);