boblark
1 year ago
parent
624f14283e
commit
3319cfa8cb
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// WavFilePlayer.ino
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//
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// WAV file player, mono, multi-rate example
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// Output is Digital I2S - Used with the audio shield:
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//
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// The SD card may connect to different pins, depending on the
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// hardware you are using. Configure the SD card
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// pins to match your hardware. It is set for T4.x Rev D PJRC
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// Teensy Audio Adaptor card here.
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//
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// Your microSD card must have the WAV files loaded to it:
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// W9GR48.WAV
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// W9GR12.WAV
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// These are at
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// https://github.com/chipaudette/OpenAudio_ArduinoLibrary/blob/master/utility/
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//
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// INO based on PJRC file of the same name, but converted to work with the
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// OpenAudio_ArduinoLibrary with floating point F32 audio.
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// Provision has been added for
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// WAV files with sub-multiple sampling rates, relative to Audio rate.
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// The latter adds an optional .INO defined FIR filter just before the
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// audio is transmitted from the AudioSDPlayer_F32 update function. This
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// filter is needed for sub-multiple WAV rates, but is available for any
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// place it is helpful. Comments to Bob Larkin. Jan 2023
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//
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// This example is monoraural only, but demonstrates 12 ksps sampling
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// in the WAV file. See the other example, wavPlayerStereo.ino
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// that uses stereo files, like the original I16 library
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// example did.
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// This example code is in the public domain.
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#include <Audio.h> |
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#include <Wire.h> |
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#include <SPI.h> |
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#include <SD.h> |
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#include "OpenAudio_ArduinoLibrary.h" |
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// This INO is setup to run audio sample rate at 48 ksps but the WAV file
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// can be either 48 ksps or 12 ksps. There are multiple W9GR files at different
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// sample rates. Select by SUB_MULT of 1 or 4.
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#define SUB_MULT 1 |
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// T3.x supported sample rates: 2000, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 44117, 48000,
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// 88200, 88235 (44117*2), 95680, 96000, 176400, 176470, 192000
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// T4.x supports any sample rate the codec will hanedle.
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const float sample_rate_Hz = 48000.0f; |
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const int audio_block_samples = 128; // Always 128, which is AUDIO_BLOCK_SAMPLES from AudioStream.h
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AudioSettings_F32 audio_settings(sample_rate_Hz, audio_block_samples); |
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AudioSDPlayer_F32 playWav1(audio_settings); |
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AudioAnalyzeRMS_F32 rms1; |
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AudioAnalyzeRMS_F32 rms2; |
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AudioOutputI2S_F32 audioOutput(audio_settings); |
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AudioConnection_F32 patchCord1(playWav1, 0, audioOutput, 0); |
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AudioConnection_F32 patchCord3(playWav1, 0, rms1, 0); |
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AudioConnection_F32 patchCord4(playWav1, 1, rms2, 0); |
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AudioConnection_F32 patchCord2(playWav1, 1, audioOutput, 1); |
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AudioControlSGTL5000 sgtl5000_1; |
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// Use these with the Teensy 4.x Rev D Audio Shield (NOT for T3.x)
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#define SDCARD_CS_PIN 10 |
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#define SDCARD_MOSI_PIN 11 |
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#define SDCARD_SCK_PIN 13 |
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#if SUB_MULT==4 |
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/* This filter is a LPF to smooth out the zero data added for interpolation
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* of the sample rate. It is a |
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* FIR filter designed with http://t-filter.appspot.com
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* Sampling frequency: 48000 Hz |
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* 0 Hz - 3000 Hz ripple = 0.12 dB |
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* 6000 Hz - 24000 Hz atten min = -62.17 dB */ |
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static float32_t fir3k48k[45] = { |
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-0.00111325f,-0.00202997f,-0.00306939f,-0.00351866f,-0.00274389f,-0.00035614f, |
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0.00346572f, 0.00778335f, 0.01098197f, 0.01119770f, 0.00702222f,-0.00172373f, |
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-0.01344104f,-0.02471188f,-0.03091211f,-0.02741134f,-0.01105157f, 0.01854769f, |
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0.05833902f, 0.10214361f, 0.14192191f, 0.16971322f, 0.17968923f, 0.16971322f, |
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0.14192191f, 0.10214361f, 0.05833902f, 0.01854769f,-0.01105157f,-0.02741134f, |
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-0.03091211f,-0.02471188f,-0.01344104f,-0.00172373f, 0.00702222f, 0.01119770f, |
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0.01098197f, 0.00778335f, 0.00346572f,-0.00035614f,-0.00274389f,-0.00351866f, |
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-0.00306939f,-0.00202997f,-0.00111325f}; |
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// CMSIS FIR requires the following buffers
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float32_t firBufferL[128+45-1]; |
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float32_t firBufferR[128+45-1]; |
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#endif |
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/* subMult is a global struct definition from AudioSDPlayer_F32.h
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* struct subMult { |
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* uint16_t rateRatio; // Should be 1 for no rate change, else 2, 4, 8
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* uint16_t numCoeffs; // FIR filter for interpolation
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* float32_t* firCoeffs; // FIR Filter Coeffs
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* float32_t* firBufferL; // pointer to 127 + numCoeffs float32_t, left ch
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* float32_t* firBufferR; // pointer to 127 + numCoeffs float32_t, right ch
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* }; |
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*/ |
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#if SUB_MULT==4 |
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// Both buffers are left for mono.
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struct subMult wavQuarter = {4, 45, fir3k48k, firBufferL, firBufferL}; |
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// Next a sample of subMult for no interpolation and no FIR filter
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#else |
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struct subMult wavQuarter = {1, 0, NULL, NULL, NULL}; |
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#endif |
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// And next is a sample of no interpolation, but borrowing the FIR filter
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// for some non-interpolation reason.
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// struct subMult wavQuarter = {1, 45, fir3k48k, firBufferL, firBufferL};
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// wavData is a global struct, definined in AudioSDPlayer_F32.h
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// This provides information about the current WAV file to this .INO
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struct wavData* pCurrentWavData; |
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void setup() { // ********** SETUP **********
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Serial.begin(9600); delay(1000); |
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Serial.println("*** F32 WAV from SD Card ***"); |
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AudioMemory_F32(30, audio_settings); |
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pCurrentWavData = playWav1.getCurrentWavData(); |
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sgtl5000_1.enable(); |
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audioOutput.setGain(0.05); // <<< Output volume control
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SPI.setMOSI(SDCARD_MOSI_PIN); |
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SPI.setSCK(SDCARD_SCK_PIN); |
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Serial.print("SD.begin() returns "); Serial.println(SD.begin(SDCARD_CS_PIN)); |
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} |
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void playFile(const char *filename) |
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{ |
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Serial.println(""); |
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Serial.print("Playing file: "); |
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Serial.println(filename); |
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// Allow for running the WAV file at a sub-rate from the Audio rate
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// Two of these are defined above for 1 and 4 sub rates.
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playWav1.setSubMult(&wavQuarter); |
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// Start playing the file. This sketch continues to
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// run while the file plays.
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playWav1.play(filename); |
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// A brief delay for the library read WAV info
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delay(25); |
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Serial.print("WAV file format = "); Serial.println(pCurrentWavData->audio_format); |
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Serial.print("WAV number channels = "); Serial.println(pCurrentWavData->num_channels); |
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Serial.print("WAV File Sample Rate = "); Serial.println(pCurrentWavData->sample_rate); |
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Serial.print("Number of bits per Sample = "); Serial.println(pCurrentWavData->bits); |
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Serial.print("File length, seconds = "); |
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Serial.println(0.001f*(float32_t)playWav1.lengthMillis(), 3); |
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// Simply wait for the file to finish playing.
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while (playWav1.isPlaying()) |
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{ |
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Serial.print("RMS "); |
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delay(1000); |
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if(rms1.available()) |
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Serial.print(rms1.read(),5); |
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Serial.print(" L R "); |
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if(rms2.available()) |
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Serial.print(rms2.read(),5); |
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// Time in seconds
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Serial.print(" t="); |
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Serial.println(0.001f*(float32_t)playWav1.positionMillis(), 3); |
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} |
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Serial.println(""); |
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} |
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void loop() { |
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#if SUB_MULT==4 |
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playFile("W9GR12.WAV"); // filenames are always uppercase 8.3 format
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#elif SUB_MULT==1 |
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playFile("W9GR48.WAV"); |
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#else |
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Serial.println("**** Non-used SUB_MULT. Use 1 or 4. ****"); |
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#endif |
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delay(500); |
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} |
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@ -0,0 +1,133 @@ |
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// WavFilePlayer2.ino
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//
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// WAV file player, stereo, 44.1 ksps example
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// Output is Digital I2S - Used with the audio shield:
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//
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// The SD card may connect to different pins, depending on the
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// hardware you are using. Configure the SD card
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// pins to match your hardware. It is set for T4.x Rev D PJRC
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// Teensy Audio Adaptor card here.
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//
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// Your microSD card must have the WAV files loaded to it:
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// SDTEST1.WAV
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// SDTEST2.WAV
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// SDTEST3.WAV
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// SDTEST4.WAV
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// These are PJRC Teensy I16 library test files and are at
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// http://www.pjrc.com/teensy/td_libs_AudioDataFiles.html
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//
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// INO based on PJRC file of the same name, but converted to work with the
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// OpenAudio_ArduinoLibrary with floating point F32 audio.
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// Provision has been added for
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// WAV files with sub-multiple sampling rates, relative to Audio rate.
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// The latter adds an optional .INO defined FIR filter just before the
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// audio is transmitted from the AudioSDPlayer_F32 update function. This
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// filter is needed for sub-multiple WAV rates, but is available for any
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// place it is helpful. Comments to Bob Larkin. Jan 2023
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//
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// This example is stereo only, but demonstrates 12 ksps sampling
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// in the WAV file. See the other example, wavPlayer.ino
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// that uses monaural files with 2 different sample rates.
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//
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// This example code is in the public domain.
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#include <Audio.h> |
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#include <Wire.h> |
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#include <SPI.h> |
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#include <SD.h> |
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#include "OpenAudio_ArduinoLibrary.h" |
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// This INO is setup to run audio sample rate at 44.1 ksps
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// T3.x supported sample rates: 2000, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 44117, 48000,
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// 88200, 88235 (44117*2), 95680, 96000, 176400, 176470, 192000
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// T4.x supports any sample rate the codec will hanedle.
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const float sample_rate_Hz = 44100.0f; |
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const int audio_block_samples = 128; // Always 128, which is AUDIO_BLOCK_SAMPLES from AudioStream.h
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AudioSettings_F32 audio_settings(sample_rate_Hz, audio_block_samples); |
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AudioSDPlayer_F32 playWav1(audio_settings); |
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AudioAnalyzeRMS_F32 rms1; |
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AudioAnalyzeRMS_F32 rms2; |
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AudioOutputI2S_F32 audioOutput(audio_settings); |
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AudioConnection_F32 patchCord1(playWav1, 0, audioOutput, 0); |
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AudioConnection_F32 patchCord3(playWav1, 0, rms1, 0); |
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AudioConnection_F32 patchCord4(playWav1, 1, rms2, 0); |
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AudioConnection_F32 patchCord2(playWav1, 1, audioOutput, 1); |
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AudioControlSGTL5000 sgtl5000_1; |
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// Use these with the Teensy 4.x Rev D Audio Shield (NOT for T3.x)
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#define SDCARD_CS_PIN 10 |
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#define SDCARD_MOSI_PIN 11 |
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#define SDCARD_SCK_PIN 13 |
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// subMult allows slower rates for the WAV files. Not used here
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//struct subMult wavNormal = {1, 0, NULL, NULL, NULL};
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// wavData is a global struct, definined in AudioSDPlayer_F32.h
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// This provides information about the current WAV file to this .INO
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struct wavData* pCurrentWavData; |
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void setup() { // ********** SETUP **********
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Serial.begin(9600); delay(1000); |
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Serial.println("*** F32 WAV from SD Card ***"); |
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AudioMemory_F32(30, audio_settings); |
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pCurrentWavData = playWav1.getCurrentWavData(); |
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sgtl5000_1.enable(); |
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audioOutput.setGain(0.05); // <<< Output volume control
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SPI.setMOSI(SDCARD_MOSI_PIN); |
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SPI.setSCK(SDCARD_SCK_PIN); |
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Serial.print("SD.begin() returns "); |
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Serial.println(SD.begin(SDCARD_CS_PIN)); // Opens the microSD card
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} |
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void playFile(const char *filename) { |
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Serial.println(""); |
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Serial.print("Playing file: "); |
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Serial.println(filename); |
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// Start playing the file. This sketch continues to
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// run while the file plays.
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playWav1.play(filename); |
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// A brief delay for the library read WAV info
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delay(25); |
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Serial.print("WAV file format = "); Serial.println(pCurrentWavData->audio_format); |
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Serial.print("WAV number channels = "); Serial.println(pCurrentWavData->num_channels); |
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Serial.print("WAV File Sample Rate = "); Serial.println(pCurrentWavData->sample_rate); |
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Serial.print("Number of bits per Sample = "); Serial.println(pCurrentWavData->bits); |
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Serial.print("File length, seconds = "); |
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Serial.println(0.001f*(float32_t)playWav1.lengthMillis(), 3); |
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// Simply wait for the file to finish playing.
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while (playWav1.isPlaying()) |
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{ |
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Serial.print("RMS "); |
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delay(1000); |
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if(rms1.available()) |
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Serial.print(rms1.read(),5); |
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Serial.print(" L R "); |
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if(rms2.available()) |
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Serial.print(rms2.read(),5); |
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// Time in seconds
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Serial.print(" t="); |
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Serial.println(0.001f*(float32_t)playWav1.positionMillis(), 3); |
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} |
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Serial.println(""); |
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} |
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void loop() { |
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playFile("SDTEST1.WAV"); // filenames are always uppercase 8.3 format
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delay(500); |
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playFile("SDTEST2.WAV"); |
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delay(500); |
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playFile("SDTEST3.WAV"); |
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delay(500); |
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playFile("SDTEST4.WAV"); |
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delay(500); |
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} |
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