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@ -7,12 +7,13 @@ |
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Uses Teensy Audio Adapter. |
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Uses Teensy Audio Adapter. |
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Assumes microphones (or whatever) are attached to the LINE IN (stereo) |
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Assumes microphones (or whatever) are attached to the LINE IN (stereo) |
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Use potentiometer mounted to Audio Board to control the amount of gain. |
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MIT License. use at your own risk. |
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MIT License. use at your own risk. |
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*/ |
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*/ |
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//These are the includes from the Teensy Audio Library
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//These are the includes from the Teensy Audio Library
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#include <Audio.h> //Teensy Audio Librarya |
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#include <Audio.h> //Teensy Audio Library |
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#include <Wire.h> |
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#include <Wire.h> |
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#include <SPI.h> |
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#include <SPI.h> |
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#include <SD.h> |
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#include <SD.h> |
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@ -25,8 +26,8 @@ AudioControlSGTL5000 sgtl5000_1; //controller for the Teensy Audio Board |
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AudioInputI2S i2s_in; //Digital audio *from* the Teensy Audio Board ADC. Sends Int16. Stereo.
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AudioInputI2S i2s_in; //Digital audio *from* the Teensy Audio Board ADC. Sends Int16. Stereo.
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AudioOutputI2S i2s_out; //Digital audio *to* the Teensy Audio Board DAC. Expects Int16. Stereo
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AudioOutputI2S i2s_out; //Digital audio *to* the Teensy Audio Board DAC. Expects Int16. Stereo
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AudioConvert_I16toF32 int2Float1, int2Float2; //Converts Int16 to Float. See class in AudioStream_F32.h
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AudioConvert_I16toF32 int2Float1, int2Float2; //Converts Int16 to Float. See class in AudioStream_F32.h
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AudioConvert_F32toI16 float2Int1, float2Int2; //Converts Float to Int16. See class in AudioStream_F32.h
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AudioEffectGain_F32 gain1, gain2; //Applies digital gain to audio data. Expected Float data.
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AudioEffectGain_F32 gain1, gain2; //Applies digital gain to audio data. Expected Float data.
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AudioConvert_F32toI16 float2Int1, float2Int2; //Converts Float to Int16. See class in AudioStream_F32.h
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//Make all of the audio connections
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//Make all of the audio connections
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AudioConnection patchCord1(i2s_in, 0, int2Float1, 0); //connect the Left input to the Left Int->Float converter
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AudioConnection patchCord1(i2s_in, 0, int2Float1, 0); //connect the Left input to the Left Int->Float converter
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@ -49,10 +50,9 @@ const int myInput = AUDIO_INPUT_LINEIN; |
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void setup() { |
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void setup() { |
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Serial.begin(115200); //open the USB serial link to enable debugging messages
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Serial.begin(115200); //open the USB serial link to enable debugging messages
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delay(500); //give the computer's USB serial system a moment to catch up.
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delay(500); //give the computer's USB serial system a moment to catch up.
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Serial.println("Teensy Hearing Aid: BasicGain_Float..."); //identify myself over the USB serial
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Serial.println("OpenAudio_ArduinoLibrary BasicGain_Float...");
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// Audio connections require memory, and the record queue
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// Audio connections require memory
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// uses this memory to buffer incoming audio.
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AudioMemory(10); //allocate Int16 audio data blocks
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AudioMemory(10); //allocate Int16 audio data blocks
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AudioMemory_F32(10); //allocate Float32 audio data blocks
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AudioMemory_F32(10); //allocate Float32 audio data blocks
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