Added new AudioEffectAnalogDelay, and restructured the library

README.md

@@ -5,9 +5,12 @@ Tested with:
 Arduino IDE: 1.8.4
 Teensyduinio: 1.39
 
+*** This library requires a forked version of DmaSpi. You must download the version from here: ***
+*** https://github.com/Blackaddr/DmaSpi ***
+
 *** If this library fails to compile, please ensure you have updated your Arduino IDE/Teensyduino at least to the versions listed above. ***
 
-This library contains convience C++ classes to allow full and easy access to the features of the Teensy Guitar Audio Series of boards.
+This library contains convienence C++ classes to allow full and easy access to the features of the Teensy Guitar Audio Series of boards.
 
 "Teensy" is an Arduino compatible series of boards from www.pjrc.com
 

examples/BA4_TGA_Pro_delay_reverb/BA4_TGA_Pro_delay_reverb.ino

@@ -35,13 +35,14 @@ AudioConnection      patch2(delayModule,0, gainModule, 0); // send the delay to
 AudioConnection      patch2b(gainModule, 0, reverb, 0); // then to the reverb
 
 
-AudioConnection      patch1(i2sIn,1, mixer,0); // mixer input 0 is our original dry signal
+AudioConnection      patch1(i2sIn,0, mixer,0); // mixer input 0 is our original dry signal
 AudioConnection      patch3(reverb, 0, mixer, 1); // mixer input 1 is our wet
 
 AudioConnection      patch4(mixer, 0, cabFilter, 0); // mixer outpt to the cabinet filter
 
 
 AudioConnection      patch5(cabFilter, 0, i2sOut, 0); // connect the cab filter to the output.
+AudioConnection      patch5b(cabFilter, 0, i2sOut, 1); // connect the cab filter to the output.
 
 void setup() {
 

examples/Delay/AnalogDelayDemo/AnalogDelayDemo.ino

@@ -7,86 +7,99 @@ AudioInputI2S i2sIn;
 AudioOutputI2S i2sOut;
 BAAudioControlWM8731 codec;
 
-#define USE_EXT
+/// IMPORTANT /////
+// YOU MUST COMPILE THIS DEMO USING Serial + Midi
+
+//#define USE_EXT // uncomment this line to use External MEM0
+
+#define MIDI_DEBUG // uncomment to see raw MIDI info in terminal
 
 #ifdef USE_EXT
 // If using external SPI memory, we will instantiance an SRAM
 // manager and create an external memory slot to use as the memory
 // for our audio delay
-ExternalSramManager externalSram(1); // Manage only one SRAM.
+ExternalSramManager externalSram;
 ExtMemSlot delaySlot; // Declare an external memory slot.
 
 // Instantiate the AudioEffectAnalogDelay to use external memory by
 /// passing it the delay slot.
-AudioEffectAnalogDelay myDelay(&delaySlot);
+AudioEffectAnalogDelay analogDelay(&delaySlot);
 #else
 // If using internal memory, we will instantiate the AudioEffectAnalogDelay
 // by passing it the maximum amount of delay we will use in millseconds. Note that
 // audio delay lengths are very limited when using internal memory due to limited
 // internal RAM size.
-AudioEffectAnalogDelay myDelay(200.0f); // max delay of 200 ms.
+AudioEffectAnalogDelay analogDelay(200.0f); // max delay of 200 ms.
 #endif
 
-//AudioMixer4              mixer; // Used to mix the original dry with the wet (effects) path.
+AudioFilterBiquad cabFilter; // We'll want something to cut out the highs and smooth the tone, just like a guitar cab.
-//
-//AudioConnection patch0(i2sIn,0, myDelay,0);
-//AudioConnection mixerDry(i2sIn,0, mixer,0);
-//AudioConnection mixerWet(myDelay,0, mixer,1);
 
-AudioConnection input(i2sIn,0, myDelay,0);
+// Record the audio to the PC
-AudioConnection leftOut(myDelay,0, i2sOut, 0);
+//AudioOutputUSB usb;
 
-int loopCount = 0;
+// Simply connect the input to the delay, and the output
+// to both i2s channels
+AudioConnection input(i2sIn,0, analogDelay,0);
+AudioConnection delayOut(analogDelay, 0, cabFilter, 0);
+AudioConnection leftOut(cabFilter,0, i2sOut, 0);
+AudioConnection rightOut(cabFilter,0, i2sOut, 1);
+//AudioConnection leftOutUSB(cabFilter,0, usb, 0);
+//AudioConnection rightOutUSB(cabFilter,0, usb, 1);
 
-AudioConnection rightOut(myDelay,0, i2sOut, 1);
+int loopCount = 0;
 
 void setup() {
   delay(100);
-  Serial.begin(57600);
+  Serial.begin(57600); // Start the serial port
+
+  // Disable the codec first
   codec.disable();
   delay(100);
   AudioMemory(128);
   delay(5);
 
-  // Setup MIDI
+  // Enable the codec
-  //usbMIDI.setHandleControlChange(OnControlChange);
   Serial.println("Enabling codec...\n");
   codec.enable();
   delay(100);
 
-  
+  // If using external memory request request memory from the manager
+  // for the slot
   #ifdef USE_EXT
   Serial.println("Using EXTERNAL memory");
   // We have to request memory be allocated to our slot.
-  externalSram.requestMemory(&delaySlot, 1400.0f, MemSelect::MEM1, true);
+  externalSram.requestMemory(&delaySlot, 500.0f, MemSelect::MEM0, true);
   #else
   Serial.println("Using INTERNAL memory");
   #endif
 
-  // Configure which MIDI CC's will control the effects
+  // Configure which MIDI CC's will control the effect parameters
-  myDelay.mapMidiControl(AudioEffectAnalogDelay::BYPASS,16);
+  analogDelay.mapMidiControl(AudioEffectAnalogDelay::BYPASS,16);
-  myDelay.mapMidiControl(AudioEffectAnalogDelay::DELAY,20);
+  analogDelay.mapMidiControl(AudioEffectAnalogDelay::DELAY,20);
-  myDelay.mapMidiControl(AudioEffectAnalogDelay::FEEDBACK,21);
+  analogDelay.mapMidiControl(AudioEffectAnalogDelay::FEEDBACK,21);
-  myDelay.mapMidiControl(AudioEffectAnalogDelay::MIX,22);
+  analogDelay.mapMidiControl(AudioEffectAnalogDelay::MIX,22);
-  myDelay.mapMidiControl(AudioEffectAnalogDelay::VOLUME,23);
+  analogDelay.mapMidiControl(AudioEffectAnalogDelay::VOLUME,23);
-
+
-  // Besure to enable the delay, by default it's processing is off.
+  // Besure to enable the delay. When disabled, audio is is completely blocked
-  myDelay.enable(); 
+  // to minimize resources to nearly zero.
-
+  analogDelay.enable(); 
-  // Set some default values. They can be changed by sending MIDI CC messages
+
-  // over the USB.
+  // Set some default values.
-  myDelay.delay(200.0f);
+  // These can be changed by sending MIDI CC messages over the USB using
-  myDelay.bypass(false);
+  // the BAMidiTester application.
-  myDelay.mix(1.0f);
+  analogDelay.delay(200.0f); // initial delay of 200 ms
-  myDelay.feedback(0.0f);
+  analogDelay.bypass(false);
-  
+  analogDelay.mix(0.5f);
-//  mixer.gain(0, 0.0f); // unity gain on the dry
+  analogDelay.feedback(0.0f);
-//  mixer.gain(1, 1.0f); // unity gain on the wet
+
-
+  // Setup 2-stages of LPF, cutoff 4500 Hz, Q-factor 0.7071 (a 'normal' Q-factor)
+  cabFilter.setLowpass(0, 4500, .7071);
+  cabFilter.setLowpass(1, 4500, .7071);
 }
 
 void OnControlChange(byte channel, byte control, byte value) {
-  myDelay.processMidi(channel, control, value);
+  analogDelay.processMidi(channel, control, value);
+  #ifdef MIDI_DEBUG
   Serial.print("Control Change, ch=");
   Serial.print(channel, DEC);
   Serial.print(", control=");
@@ -94,32 +107,34 @@ void OnControlChange(byte channel, byte control, byte value) {
   Serial.print(", value=");
   Serial.print(value, DEC);
   Serial.println();
-
+  #endif  
-  
 }
 
 void loop() {
   // usbMIDI.read() needs to be called rapidly from loop().  When
   // each MIDI messages arrives, it return true.  The message must
   // be fully processed before usbMIDI.read() is called again.
-  //Serial.println(".");
 
-  if (loopCount % 262144 == 0) {
+  if (loopCount % 524288 == 0) {
-  Serial.print("Processor Usage: "); Serial.print(AudioProcessorUsage());
+    Serial.print("Processor Usage, Total: "); Serial.print(AudioProcessorUsage());
-  Serial.print(" "); Serial.print(AudioProcessorUsageMax());
+    Serial.print("% ");
-  Serial.print(" Delay: "); Serial.print(myDelay.processorUsage());
+    Serial.print(" analogDelay: "); Serial.print(analogDelay.processorUsage());
-  Serial.print(" "); Serial.println(myDelay.processorUsageMax());
+    Serial.println("%");
   }
   loopCount++;
-  
+
+  // check for new MIDI from USB
   if (usbMIDI.read()) {
+    // this code entered only if new MIDI received
     byte type, channel, data1, data2, cable;
     type = usbMIDI.getType();       // which MIDI message, 128-255
       channel = usbMIDI.getChannel(); // which MIDI channel, 1-16
       data1 = usbMIDI.getData1();     // first data byte of message, 0-127
       data2 = usbMIDI.getData2();     // second data byte of message, 0-127
-      //cable = usbMIDI.getCable();     // which virtual cable with MIDIx8, 0-7
     if (type == 3) {
+      // if type is 3, it's a CC MIDI Message
+      // Note: the Arduino MIDI library encodes channels as 1-16 instead
+      // of 0 to 15 as it should, so we must subtract one.
       OnControlChange(channel-1, data1, data2);
     }
   }

src/LibBasicFunctions.h

@@ -61,7 +61,12 @@ QueuePosition calcQueuePosition(size_t numSamples);
 /// given length of time.
 /// @param milliseconds length of the interval in milliseconds
 /// @returns the number of corresonding audio samples.
-size_t        calcAudioSamples(float milliseconds);
+size_t calcAudioSamples(float milliseconds);
+
+/// Calculate a length of time in milliseconds from the number of audio samples.
+/// @param numSamples Number of audio samples to convert to time
+/// @return the equivalent time in milliseconds.
+float calcAudioTimeMs(size_t numSamples);
 
 /// Calculate the number of audio samples (usually an offset) from
 /// a queue position.

src/LibMemoryManagement.h

@@ -171,11 +171,11 @@ private:
  *****************************************************************************/
 class ExternalSramManager final {
 public:
-	ExternalSramManager() = delete;
+	ExternalSramManager();
 
 	/// The manager is constructed by specifying how many external memories to handle allocations for
 	/// @param numMemories the number of external memories
-	ExternalSramManager(unsigned numMemories = 1);
+	ExternalSramManager(unsigned numMemories);
 	virtual ~ExternalSramManager();
 
 	/// Query the amount of available (unallocated) memory

src/common/AudioHelpers.cpp

@@ -28,6 +28,11 @@ size_t calcAudioSamples(float milliseconds)
 	return (size_t)((milliseconds*(AUDIO_SAMPLE_RATE_EXACT/1000.0f))+0.5f);
 }
 
+float calcAudioTimeMs(size_t numSamples)
+{
+	return ((float)(numSamples) / AUDIO_SAMPLE_RATE_EXACT) * 1000.0f;
+}
+
 QueuePosition calcQueuePosition(size_t numSamples)
 {
 	QueuePosition queuePosition;

src/common/ExternalSramManager.cpp

@@ -31,6 +31,7 @@ namespace BAGuitar {
 bool ExternalSramManager::m_configured = false;
 MemConfig ExternalSramManager::m_memConfig[BAGuitar::NUM_MEM_SLOTS];
 
+
 ExternalSramManager::ExternalSramManager(unsigned numMemories)
 {
 	// Initialize the static memory configuration structs
@@ -46,6 +47,12 @@ ExternalSramManager::ExternalSramManager(unsigned numMemories)
 	}
 }
 
+ExternalSramManager::ExternalSramManager()
+: ExternalSramManager(1)
+{
+
+}
+
 ExternalSramManager::~ExternalSramManager()
 {
 	for (unsigned i=0; i < NUM_MEM_SLOTS; i++) {

src/effects/AudioEffectAnalogDelay.cpp

@@ -44,7 +44,7 @@ AudioEffectAnalogDelay::AudioEffectAnalogDelay(ExtMemSlot *slot)
 : AudioStream(1, m_inputQueueArray)
 {
 	m_memory = new AudioDelay(slot);
-	m_maxDelaySamples = slot->size();
+	m_maxDelaySamples = (slot->size() / sizeof(int16_t));
 	m_externalMemory = true;
 	m_iir = new IirBiQuadFilterHQ(NUM_IIR_STAGES, reinterpret_cast<const int32_t *>(&DEFAULT_COEFFS), IIR_COEFF_SHIFT);
 }
@@ -120,18 +120,9 @@ void AudioEffectAnalogDelay::update(void)
 
 
 	// BACK TO OUTPUT PROCESSING
-//	audio_block_t *blockToOutput = nullptr;
-//	blockToOutput = allocate();
-
-	// copy the output data
-//	if (!blockToOutput) return; // skip this time due to failure
-//	// copy over data
-//	m_memory->getSamples(blockToOutput, m_delaySamples);
-
 	// Check if external DMA, if so, we need to be sure the read is completed
 	if (m_externalMemory && m_memory->getSlot()->isUseDma()) {
 	    // Using DMA
-		unsigned loopCount = 0;
 		while (m_memory->getSlot()->isReadBusy()) {}
 	}
 
@@ -143,11 +134,14 @@ void AudioEffectAnalogDelay::update(void)
 	release(m_previousBlock);
 	m_previousBlock = blockToOutput;
 
-	if (m_externalMemory && m_memory->getSlot()->isUseDma()) {
+//	if (m_externalMemory && m_memory->getSlot()->isUseDma()) {
-	    // Using DMA
+//	    // Using DMA
-		if (m_blockToRelease) release(m_blockToRelease);
+//		if (m_blockToRelease) release(m_blockToRelease);
-		m_blockToRelease = blockToRelease;
+//		m_blockToRelease = blockToRelease;
-	}
+//	}
+
+	if (m_blockToRelease) release(m_blockToRelease);
+	m_blockToRelease = blockToRelease;
 }
 
 void AudioEffectAnalogDelay::delay(float milliseconds)
@@ -229,9 +223,11 @@ void AudioEffectAnalogDelay::processMidi(int channel, int control, int value)
 	if ((m_midiConfig[DELAY][MIDI_CHANNEL] == channel) &&
         (m_midiConfig[DELAY][MIDI_CONTROL] == control)) {
 		// Delay
-		m_maxDelaySamples = m_memory->getSlot()->size();
+		if (m_externalMemory) { m_maxDelaySamples = m_memory->getSlot()->size() / sizeof(int16_t); }
-		Serial.println(String("AudioEffectAnalogDelay::delay: ") + val + String(" out of ") + m_maxDelaySamples);
+		size_t delayVal = (size_t)(val * (float)m_maxDelaySamples);
-		delay((size_t)(val * (float)m_maxDelaySamples));
+		delay(delayVal);
+		Serial.println(String("AudioEffectAnalogDelay::delay (ms): ") + calcAudioTimeMs(delayVal)
+				+ String(" (samples): ") + delayVal + String(" out of ") + m_maxDelaySamples);
 		return;
 	}
 
@@ -246,7 +242,7 @@ void AudioEffectAnalogDelay::processMidi(int channel, int control, int value)
 	if ((m_midiConfig[FEEDBACK][MIDI_CHANNEL] == channel) &&
         (m_midiConfig[FEEDBACK][MIDI_CONTROL] == control)) {
 		// Feedback
-		Serial.println(String("AudioEffectAnalogDelay::feedback: ") + val);
+		Serial.println(String("AudioEffectAnalogDelay::feedback: ") + 100*val + String("%"));
 		feedback(val);
 		return;
 	}
@@ -254,7 +250,7 @@ void AudioEffectAnalogDelay::processMidi(int channel, int control, int value)
 	if ((m_midiConfig[MIX][MIDI_CHANNEL] == channel) &&
         (m_midiConfig[MIX][MIDI_CONTROL] == control)) {
 		// Mix
-		Serial.println(String("AudioEffectAnalogDelay::mix: ") + val);
+		Serial.println(String("AudioEffectAnalogDelay::mix: Dry: ") + 100*(1-val) + String("% Wet: ") + 100*val );
 		mix(val);
 		return;
 	}
@@ -262,7 +258,7 @@ void AudioEffectAnalogDelay::processMidi(int channel, int control, int value)
 	if ((m_midiConfig[VOLUME][MIDI_CHANNEL] == channel) &&
         (m_midiConfig[VOLUME][MIDI_CONTROL] == control)) {
 		// Volume
-		Serial.println(String("AudioEffectAnalogDelay::volume: ") + val);
+		Serial.println(String("AudioEffectAnalogDelay::volume: ") + 100*val + String("%"));
 		volume(val);
 		return;
 	}

src/peripherals/BASpiMemory.cpp

@@ -273,10 +273,12 @@ BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId)
 		cs = SPI_CS_MEM0;
 		m_cs = new ActiveLowChipSelect(cs, m_settings);
 		break;
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
 	case SpiDeviceId::SPI_DEVICE1 :
 		cs = SPI_CS_MEM1;
 		m_cs = new ActiveLowChipSelect1(cs, m_settings);
 		break;
+#endif
 	default :
 		cs = SPI_CS_MEM0;
 	}
@@ -297,10 +299,12 @@ BASpiMemoryDMA::BASpiMemoryDMA(SpiDeviceId memDeviceId, uint32_t speedHz)
 		cs = SPI_CS_MEM0;
 		m_cs = new ActiveLowChipSelect(cs, m_settings);
 		break;
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__)
 	case SpiDeviceId::SPI_DEVICE1 :
 		cs = SPI_CS_MEM1;
 		m_cs = new ActiveLowChipSelect1(cs, m_settings);
 		break;
+#endif
 	default :
 		cs = SPI_CS_MEM0;
 	}