🔨 Fix erronious audio channel pitches being wrong

Author: SeedyROM

src/engine/audio/audio_engine.cpp

@@ -95,6 +95,8 @@ void AudioChannel::stop() {
   m_active = false;
   m_currentFile = nullptr;
   m_position = 0;
+  m_currentSpeed = 1.0f;
+  m_targetSpeed = 1.0f;
 }
 
 void AudioChannel::setVolume(float vol) {
@@ -379,10 +381,12 @@ void AudioEngine::audioCallback(float *buffer, size_t frames) {
   }
 }
 
-int AudioEngine::findFreeChannel() const {
+int AudioEngine::findFreeChannel() {
   // Skip channel 0 (reserved for music)
   for (size_t i = 1; i < MAX_CHANNELS; ++i) {
     if (!m_channels[i].isActive()) {
+      // Optionally force a stop to ensure clean state
+      m_channels[i].stop();
       return static_cast<int>(i);
     }
   }

src/engine/audio/audio_engine.h

@@ -114,7 +114,7 @@ class AudioEngine {
 
   void processCommands();
   void mixAudio(float *buffer, size_t frames);
-  [[nodiscard]] int findFreeChannel() const;
+  [[nodiscard]] int findFreeChannel();
 };
 
 }; // namespace ste