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David Gwilliam
2026-02-12 21:00:02 -08:00
parent 77f8236347
commit 8bdbf227ca
1141 changed files with 1010880 additions and 2 deletions
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libraries/audio-tools/examples/examples-stream/streams-tf-i2s/README.md Normal file
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# Generating Audio with Tensorflow Liete
The starting point is the good overview provided by [the "Hallo World" example of Tensorflow Lite](https://www.tensorflow.org/lite/microcontrollers/get_started_low_level#train_a_model) which describes how to create, train and use a model which based on the __sine function__.
We just send a generated sine wave to the I2S interface. Further information can be found in the [Wiki](https://github.com/pschatzmann/arduino-audio-tools/wiki/Tensorflow-Lite----Audio-Output)
Please note the log level should be set so that there is no disturbing output!
### External DAC:
For my tests I am using the 24-bit PCM5102 PCM5102A Stereo DAC Digital-to-analog Converter PLL Voice Module pHAT
![DAC](https://pschatzmann.github.io/Resources/img/dac.jpeg)
I am just using the default pins defined by the framework. However I could change them with the help of the config object. The mute pin can be defined in the constructor of the I2SStream - by not defining anything we use the default which is GPIO23
DAC | ESP32
-----|----------------
VCC | 5V
GND | GND
BCK | BCK (GPIO14)
DIN | OUT (GPIO22)
LCK | BCK (GPIO15)
FMT | GND
XMT | 3V (or another GPIO PIN which is set to high)
- DMP - De-emphasis control for 44.1kHz sampling rate(1): Off (Low) / On (High)
- FLT - Filter select : Normal latency (Low) / Low latency (High)
- SCL - System clock input (probably SCL on your board).
- FMT - Audio format selection : I2S (Low) / Left justified (High)
- XMT - Soft mute control(1): Soft mute (Low) / soft un-mute (High)
## Dependencies
You need to install the following libraries:
- https://github.com/pschatzmann/arduino-audio-tools
- https://github.com/pschatzmann/tflite-micro-arduino-examples

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libraries/audio-tools/examples/examples-stream/streams-tf-i2s/model.h Normal file
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#pragma once
const unsigned char g_model[] = {
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0xfd, 0x00, 0x14, 0xfd, 0x0b, 0x02, 0xef, 0xee, 0x06, 0xee, 0x01, 0x0d,
0x06, 0xe6, 0xf7, 0x11, 0xf7, 0x09, 0xf8, 0xf1, 0x21, 0xff, 0x0e, 0xf3,
0xec, 0x12, 0x26, 0x1d, 0xf2, 0xe9, 0x28, 0x18, 0xe0, 0xfb, 0xf3, 0xf4,
0x05, 0x1d, 0x1d, 0xfb, 0xfd, 0x1e, 0xfc, 0x11, 0xe8, 0x07, 0x09, 0x03,
0x12, 0xf2, 0x36, 0xfb, 0xdc, 0x1c, 0xf9, 0xef, 0xf3, 0xe7, 0x6f, 0x0c,
0x1d, 0x00, 0x45, 0xfd, 0x0e, 0xf0, 0x0b, 0x19, 0x1a, 0xfa, 0xe0, 0x19,
0x1f, 0x13, 0x36, 0x1c, 0x12, 0xeb, 0x3b, 0x0c, 0xb4, 0xcb, 0xe6, 0x13,
0xfa, 0xeb, 0xf1, 0x06, 0x1c, 0xfa, 0x18, 0xe5, 0xeb, 0xcb, 0x0c, 0xf4,
0xd6, 0xfe, 0xff, 0xff, 0x00, 0x00, 0x00, 0x09, 0x10, 0x00, 0x00, 0x00,
0x04, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
0x1b, 0x00, 0x00, 0x00, 0x73, 0x65, 0x71, 0x75, 0x65, 0x6e, 0x74, 0x69,
0x61, 0x6c, 0x5f, 0x31, 0x2f, 0x64, 0x65, 0x6e, 0x73, 0x65, 0x5f, 0x33,
0x2f, 0x4d, 0x61, 0x74, 0x4d, 0x75, 0x6c, 0x00, 0x3c, 0xfe, 0xff, 0xff,
0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x6b, 0x01, 0x4f, 0x3c, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x5e, 0xff, 0xff, 0xff, 0x04, 0x00, 0x00, 0x00,
0x40, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x77, 0x0b, 0x00, 0x00,
0x53, 0xf6, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x77, 0x0c, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd3, 0x06, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x72, 0x21, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x2f, 0x07, 0x00, 0x00, 0x67, 0xf5, 0xff, 0xff,
0x34, 0xf0, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x86, 0xff, 0xff, 0xff,
0x00, 0x00, 0x00, 0x02, 0x10, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x10, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x64, 0x65, 0x6e, 0x73,
0x65, 0x5f, 0x32, 0x2f, 0x62, 0x69, 0x61, 0x73, 0x00, 0x00, 0x00, 0x00,
0xdc, 0xfe, 0xff, 0xff, 0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x28, 0xb3, 0xd9, 0x38, 0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
0x08, 0x00, 0x04, 0x00, 0x06, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
0x10, 0x00, 0x00, 0x00, 0x75, 0x1c, 0x11, 0xe1, 0x0c, 0x81, 0xa5, 0x42,
0xfe, 0xd5, 0xd4, 0xb2, 0x61, 0x78, 0x19, 0xdf, 0x00, 0x00, 0x0e, 0x00,
0x18, 0x00, 0x08, 0x00, 0x07, 0x00, 0x0c, 0x00, 0x10, 0x00, 0x14, 0x00,
0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x10, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x1b, 0x00, 0x00, 0x00, 0x73, 0x65, 0x71, 0x75, 0x65, 0x6e, 0x74, 0x69,
0x61, 0x6c, 0x5f, 0x31, 0x2f, 0x64, 0x65, 0x6e, 0x73, 0x65, 0x5f, 0x32,
0x2f, 0x4d, 0x61, 0x74, 0x4d, 0x75, 0x6c, 0x00, 0x74, 0xff, 0xff, 0xff,
0x08, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0xd5, 0x6b, 0x8a, 0x3b, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x1c, 0x00, 0x08, 0x00, 0x07, 0x00,
0x0c, 0x00, 0x10, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00,
0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x14, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x50, 0x00, 0x00, 0x00,
0x34, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x1f, 0x00, 0x00, 0x00, 0x73, 0x65, 0x72, 0x76,
0x69, 0x6e, 0x67, 0x5f, 0x64, 0x65, 0x66, 0x61, 0x75, 0x6c, 0x74, 0x5f,
0x64, 0x65, 0x6e, 0x73, 0x65, 0x5f, 0x32, 0x5f, 0x69, 0x6e, 0x70, 0x75,
0x74, 0x3a, 0x30, 0x00, 0x02, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00,
0x04, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
0x0c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x5d, 0x4f, 0xc9, 0x3c,
0x01, 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x04, 0x00, 0x04, 0x00, 0x04, 0x00, 0x00, 0x00
};
unsigned int g_model_len = 2408;

44
libraries/audio-tools/examples/examples-stream/streams-tf-i2s/streams-tf-i2s.ino Normal file
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/**
* @file streams-tf-i2s.ino
* @author Phil Schatzmann
* @brief We use Tenorflow lite to generate some audio data and output it via I2S
* @version 0.1
* @date 2022-04-07
*
* @copyright Copyright (c) 2022
*
*/
#include "AudioTools.h"
#include "AudioTools/AudioLibs/TfLiteAudioStream.h"
#include "model.h"
TfLiteSineReader tf_reader(20000,0.3); // Audio generation logic
TfLiteAudioStream tf_stream; // Audio source -> no classification so N is 0
I2SStream i2s; // Audio destination
StreamCopy copier(i2s, tf_stream); // copy tf_stream to i2s
int channels = 1;
int samples_per_second = 16000;
void setup() {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
// Setup tensorflow input
auto tcfg = tf_stream.defaultConfig();
tcfg.channels = channels;
tcfg.sample_rate = samples_per_second;
tcfg.kTensorArenaSize = 2 * 1024;
tcfg.model = g_model;
tcfg.reader = &tf_reader;
tf_stream.begin(tcfg);
// setup Audioi2s output
auto cfg = i2s.defaultConfig(TX_MODE);
cfg.channels = channels;
cfg.sample_rate = samples_per_second;
i2s.begin(cfg);
}
void loop() { copier.copy(); }