I have worked through the project and most of it is working fine with the exception that when I play back a recorded message it seems to be two fast and choppy. If I playback the greeting it sounds fine. Not sure what is going on with the recording, but at one time before I got the common problems ironed out that most newbies reference it did seem that the mic recordings on the teensy were working. Now with everything else working this has cropped up. I am posting the code since I have replaced all hardware except the mic and still have the same problem. I am not an audio engineer, so I am not too sure where to go from here. I have new mic I replaced the exiting phone mic with and it does the exact same think. This seems to tell me I have something wrong in the code. I pasted the code in hopes someone might tell me what I have wrong. Thanks in advance for any help, desperate wedding in two weeks.
/**
* Audio Guestbook, Copyright (c) 2022 Playful Technology
*
* Tested using a Teensy 4.0 with Teensy Audio Shield, although should work
* with minor modifications on other similar hardware
*
* When handset is lifted, a pre-recorded greeting message is played, followed by a tone.
* Then, recording starts, and continues until the handset is replaced.
* Playback button allows all messages currently saved on SD card through earpiece
*
* Files are saved on SD card as 44.1kHz, 16-bit, mono signed integer RAW audio format
* These can be loaded directly into Audacity (https://www.audacityteam.org/). Or else, converted to WAV/MP3 format using SOX (https://sourceforge.net/projects/sox/)
*
**/
// INCLUDES
// The default "sketchbook" location in which Arduino IDE installs libraries is:
// C:\Users\alast\Documents\Arduino
// However, the TeensyDuino installer installs libraries in:
// C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries
// To ensure the correct libraries are used when targetting Teensy platform in Arduino IDE, go File->Preferences and change the sketchbook location to avoid conflicts with Arduino libraries.
// When targetting Arduino boards, change it back again to default
#include <Bounce.h>
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <TimeLib.h>
// DEFINES
// Define pins used by Teensy Audio Shield
#define SDCARD_CS_PIN 10
// Teensy 3.X
//#define SDCARD_MOSI_PIN 7
//#define SDCARD_SCK_PIN 14
// Teensy 4.0
#define SDCARD_MOSI_PIN 11
#define SDCARD_SCK_PIN 13
// And those used for inputs
#define HOOK_PIN 0
#define PLAYBACK_BUTTON_PIN 1
// GLOBALS
// Audio initialisation code can be generated using the GUI interface at https://www.pjrc.com/teensy/gui/
// Inputs
AudioSynthWaveform waveform1; // To create the "beep" sfx
AudioInputI2S i2s2; // I2S input from microphone on audio shield
AudioPlaySdRaw playRaw1; // Play .RAW audio files saved on SD card
AudioPlaySdWav playWav1; // Play 44.1kHz 16-bit PCM greeting WAV file
// Outputs
AudioRecordQueue queue1; // Creating an audio buffer in memory before saving to SD
AudioMixer4 mixer; // Allows merging several inputs to same output
AudioOutputI2S i2s1; // I2S interface to Speaker/Line Out on Audio shield
// Connections
AudioConnection patchCord1(waveform1, 0, mixer, 0); // wave to mixer
AudioConnection patchCord2(playRaw1, 0, mixer, 1); // raw audio to mixer
AudioConnection patchCord3(playWav1, 0, mixer, 2); // wav file playback mixer
AudioConnection patchCord4(mixer, 0, i2s1, 0); // mixer output to speaker (L)
AudioConnection patchCord5(i2s2, 0, queue1, 0); // mic input to queue (L)
AudioControlSGTL5000 sgtl5000_1;
// Filename to save audio recording on SD card
char filename[15];
// The file object itself
File frec;
// Use long 40ms debounce time on hook switch
Bounce buttonRecord = Bounce(HOOK_PIN, 50);
Bounce buttonPlay = Bounce(PLAYBACK_BUTTON_PIN, 50);
// Keep track of current state of the device
enum Mode {Initializing, Ready, Prompting, Recording, Playing};
Mode mode = Mode::Initializing;
int handsetState = 1;
int playbackState = 0;
void setup() {
// Note that Serial.begin() is not required for Teensy -
// by default it initialises serial communication at full USB speed
// See https://www.pjrc.com/teensy/td_serial.html
// Serial.begin()
Serial.println(__FILE__ __DATE__);
if (CrashReport)
Serial.print(CrashReport);
// Configure the input pins
pinMode(HOOK_PIN, INPUT_PULLUP);
pinMode(PLAYBACK_BUTTON_PIN, INPUT_PULLUP);
// Audio connections require memory, and the record queue
// uses this memory to buffer incoming audio.
AudioMemory(120);
// Enable the audio shield, select input, and enable output
sgtl5000_1.enable();
// Define which input on the audio shield to use (AUDIO_INPUT_LINEIN / AUDIO_INPUT_MIC)
sgtl5000_1.inputSelect(AUDIO_INPUT_MIC);
sgtl5000_1.volume(0.5);
// mixer.gain(0, 1.0f);
// mixer.gain(1, 1.0f);
// wait(500);
// Play a beep to indicate system is online
waveform1.begin(WAVEFORM_SINE);
waveform1.frequency(440);
waveform1.amplitude(0.6);
wait(350);
waveform1.amplitude(0);
delay(1000);
// Initialize the SD card
SPI.setMOSI(SDCARD_MOSI_PIN);
SPI.setSCK(SDCARD_SCK_PIN);
if (!(SD.begin(SDCARD_CS_PIN)))
{
// stop here if no SD card, but print a message
int loopCnt = 0;
while (1)
{
loopCnt++;
if(loopCnt > 10)
return;
Serial.println("Unable to access the SD card");
delay(500);
}
}
// Value in dB
sgtl5000_1.micGain(10);
// Synchronise the Time object used in the program code with the RTC time provider.
// See https://github.com/PaulStoffregen/Time
setSyncProvider(getTeensy3Time);
// Define a callback that will assign the correct datetime for any file system operations
// (i.e. saving a new audio recording onto the SD card)
FsDateTime::setCallback(dateTime);
mode = Mode::Ready;
}
void loop() {
// First, read the buttons
buttonRecord.update();
buttonPlay.update();
switch(mode){
case Mode::Ready:
delay(50);
// Falling edge occurs when the handset is lifted
if (buttonRecord.fallingEdge())
{
// Debug Statement
// Serial.println("Handset lifted");
mode = Mode:
rompting;
}
else if(buttonPlay.risingEdge())
{
Serial.println("Play All Greetings");
playAllRecordings();
}
break;
case Mode:rompting:
// Wait a second for users to put the handset to their ear
delay(1000);
// Play the greeting inviting them to record their message
playWav1.play("greeting.wav");
// Serial.println("Greeting is playing");
// Wait until the message has finished playing
while (playWav1.isPlaying())
{
// Check whether the handset is replaced
buttonRecord.update();
buttonPlay.update();
// Handset is replaced
if(buttonRecord.risingEdge())
{
playWav1.stop();
// Serial.println("Stopped Playing Greeting");
mode = Mode::Ready;
// Comment out return it is not
// needed and it is bad form
return;
}
if(buttonPlay.fallingEdge())
{
playWav1.stop();
playAllRecordings();
}
}
// Greeting is finished and the handset is still offhook.
// Play the tone sound effect to notify
// Guest that recording has started
// Serial.println("Start Recording");
waveform1.frequency(440);
waveform1.amplitude(0.6);
wait(1000);
waveform1.frequency(0.0);
waveform1.amplitude(0);
// Start the recording function
startRecording();
break;
case Mode::Recording:
// Check whether the handset is replaced
buttonRecord.update();
handsetState = buttonRecord.read();
buttonPlay.update();
delay(10);
if(buttonRecord.risingEdge() || (handsetState > 0))
{
// Serial.println("Stopping Recording");
// Stop recording
stopRecording();
// Play audio tone to confirm recording has ended
waveform1.frequency(523.25);
waveform1.amplitude(1.0);
delay(100);
waveform1.amplitude(0);
delay(100);
waveform1.amplitude(1.0);
delay(100);
waveform1.frequency(0.00);
waveform1.amplitude(0);
mode = Mode::Ready;
}
else
{
// Serial.println("Continue Recording");
continueRecording();
}
break;
case Mode:laying:
break;
case Mode::Initializing:
break;
}
}
void startRecording() {
// Find the first available file number
for (uint8_t i=0; i<9999; i++) {
// Format the counter as a five-digit number with leading zeroes, followed by file extension
snprintf(filename, 11, " %05d.RAW", i);
// Create if does not exist, do not open existing, write, sync after write
if (!SD.exists(filename)) {
break;
}
}
frec = SD.open(filename, FILE_WRITE);
if(frec) {
Serial.println("Recording to ");
Serial.println(filename);
queue1.begin();
mode = Mode::Recording;
}
else {
Serial.println("Couldn't open file to record!");
}
}
void continueRecording() {
// Check if there is data in the queue
if (queue1.available() >= 2) {
byte buffer[512];
// Fetch 2 blocks from the audio library and copy
// into a 512 byte buffer. The Arduino SD library
// is most efficient when full 512 byte sector size
// writes are used.
memcpy(buffer, queue1.readBuffer(), 256);
queue1.freeBuffer();
memcpy(buffer+256, queue1.readBuffer(), 256);
queue1.freeBuffer();
// Write all 512 bytes to the SD card
frec.write(buffer, 512);
}
}
void stopRecording() {
// Stop adding any new data to the queue
queue1.end();
// Flush all existing remaining data from the queue
// Serial.println("Stopped recording");
while (queue1.available() > 0) {
// Save to open file
frec.write((byte*)queue1.readBuffer(), 256);
queue1.freeBuffer();
}
// Close the file
frec.close();
}
void playAllRecordings() {
// Recording files are saved in the root directory
File dir = SD.open("/");
while (true) {
File entry = dir.openNextFile();
if (!entry) {
// no more files
entry.close();
// Play audio tone to confirm Playback has ended
waveform1.frequency(523.25);
waveform1.amplitude(0.9);
wait(100);
waveform1.amplitude(0);
wait(50);
waveform1.amplitude(0.9);
wait(100);
waveform1.frequency(0.00);
waveform1.amplitude(0);
break;
}
int8_t len = strlen(entry.name());
if (strstr(strlwr(entry.name() + (len - 4)), ".raw")) {
// Serial.print("Now playing ");
// Serial.println(entry.name());
// Play a short beep before each message
waveform1.amplitude(0.5);
wait(250);
waveform1.amplitude(0);
// Play the file
playRaw1.play(entry.name());
mode = Mode:laying;
}
entry.close();
while (playRaw1.isPlaying()) {
buttonPlay.update();
buttonRecord.update();
// Button is pressed again
if(buttonPlay.risingEdge() || buttonRecord.fallingEdge()) {
playRaw1.stop();
mode = Mode::Ready;
return;
}
}
}
// All files have been played
mode = Mode::Ready;
}
// Retrieve the current time from Teensy built-in RTC
time_t getTeensy3Time()
{
return Teensy3Clock.get();
}
// Callback to assign timestamps for file system operations
void dateTime(uint16_t* date, uint16_t* time, uint8_t* ms10)
{
// Return date using FS_DATE macro to format fields.
*date = FS_DATE(year(), month(), day());
// Return time using FS_TIME macro to format fields.
*time = FS_TIME(hour(), minute(), second());
// Return low time bits in units of 10 ms.
*ms10 = second() & 1 ? 100 : 0;
}
// Non-blocking delay, which pauses execution of main program logic,
// but while still listening for input
void wait(unsigned int milliseconds) {
elapsedMillis msec=0;
while (msec <= milliseconds) {
buttonRecord.update();
buttonPlay.update();
// if (buttonRecord.fallingEdge()) Serial.println("Button (pin 0) Press");
// if (buttonPlay.risingEdge()) Serial.println("Button (pin 1) Press");
// if (buttonRecord.risingEdge()) Serial.println("Button (pin 0) Release");
// if (buttonPlay.fallingEdge()) Serial.println("Button (pin 1) Release");
}
}
/**
* Audio Guestbook, Copyright (c) 2022 Playful Technology
*
* Tested using a Teensy 4.0 with Teensy Audio Shield, although should work
* with minor modifications on other similar hardware
*
* When handset is lifted, a pre-recorded greeting message is played, followed by a tone.
* Then, recording starts, and continues until the handset is replaced.
* Playback button allows all messages currently saved on SD card through earpiece
*
* Files are saved on SD card as 44.1kHz, 16-bit, mono signed integer RAW audio format
* These can be loaded directly into Audacity (https://www.audacityteam.org/). Or else, converted to WAV/MP3 format using SOX (https://sourceforge.net/projects/sox/)
*
**/
// INCLUDES
// The default "sketchbook" location in which Arduino IDE installs libraries is:
// C:\Users\alast\Documents\Arduino
// However, the TeensyDuino installer installs libraries in:
// C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries
// To ensure the correct libraries are used when targetting Teensy platform in Arduino IDE, go File->Preferences and change the sketchbook location to avoid conflicts with Arduino libraries.
// When targetting Arduino boards, change it back again to default
#include <Bounce.h>
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <TimeLib.h>
// DEFINES
// Define pins used by Teensy Audio Shield
#define SDCARD_CS_PIN 10
// Teensy 3.X
//#define SDCARD_MOSI_PIN 7
//#define SDCARD_SCK_PIN 14
// Teensy 4.0
#define SDCARD_MOSI_PIN 11
#define SDCARD_SCK_PIN 13
// And those used for inputs
#define HOOK_PIN 0
#define PLAYBACK_BUTTON_PIN 1
// GLOBALS
// Audio initialisation code can be generated using the GUI interface at https://www.pjrc.com/teensy/gui/
// Inputs
AudioSynthWaveform waveform1; // To create the "beep" sfx
AudioInputI2S i2s2; // I2S input from microphone on audio shield
AudioPlaySdRaw playRaw1; // Play .RAW audio files saved on SD card
AudioPlaySdWav playWav1; // Play 44.1kHz 16-bit PCM greeting WAV file
// Outputs
AudioRecordQueue queue1; // Creating an audio buffer in memory before saving to SD
AudioMixer4 mixer; // Allows merging several inputs to same output
AudioOutputI2S i2s1; // I2S interface to Speaker/Line Out on Audio shield
// Connections
AudioConnection patchCord1(waveform1, 0, mixer, 0); // wave to mixer
AudioConnection patchCord2(playRaw1, 0, mixer, 1); // raw audio to mixer
AudioConnection patchCord3(playWav1, 0, mixer, 2); // wav file playback mixer
AudioConnection patchCord4(mixer, 0, i2s1, 0); // mixer output to speaker (L)
AudioConnection patchCord5(i2s2, 0, queue1, 0); // mic input to queue (L)
AudioControlSGTL5000 sgtl5000_1;
// Filename to save audio recording on SD card
char filename[15];
// The file object itself
File frec;
// Use long 40ms debounce time on hook switch
Bounce buttonRecord = Bounce(HOOK_PIN, 50);
Bounce buttonPlay = Bounce(PLAYBACK_BUTTON_PIN, 50);
// Keep track of current state of the device
enum Mode {Initializing, Ready, Prompting, Recording, Playing};
Mode mode = Mode::Initializing;
int handsetState = 1;
int playbackState = 0;
void setup() {
// Note that Serial.begin() is not required for Teensy -
// by default it initialises serial communication at full USB speed
// See https://www.pjrc.com/teensy/td_serial.html
// Serial.begin()
Serial.println(__FILE__ __DATE__);
if (CrashReport)
Serial.print(CrashReport);
// Configure the input pins
pinMode(HOOK_PIN, INPUT_PULLUP);
pinMode(PLAYBACK_BUTTON_PIN, INPUT_PULLUP);
// Audio connections require memory, and the record queue
// uses this memory to buffer incoming audio.
AudioMemory(120);
// Enable the audio shield, select input, and enable output
sgtl5000_1.enable();
// Define which input on the audio shield to use (AUDIO_INPUT_LINEIN / AUDIO_INPUT_MIC)
sgtl5000_1.inputSelect(AUDIO_INPUT_MIC);
sgtl5000_1.volume(0.5);
// mixer.gain(0, 1.0f);
// mixer.gain(1, 1.0f);
// wait(500);
// Play a beep to indicate system is online
waveform1.begin(WAVEFORM_SINE);
waveform1.frequency(440);
waveform1.amplitude(0.6);
wait(350);
waveform1.amplitude(0);
delay(1000);
// Initialize the SD card
SPI.setMOSI(SDCARD_MOSI_PIN);
SPI.setSCK(SDCARD_SCK_PIN);
if (!(SD.begin(SDCARD_CS_PIN)))
{
// stop here if no SD card, but print a message
int loopCnt = 0;
while (1)
{
loopCnt++;
if(loopCnt > 10)
return;
Serial.println("Unable to access the SD card");
delay(500);
}
}
// Value in dB
sgtl5000_1.micGain(10);
// Synchronise the Time object used in the program code with the RTC time provider.
// See https://github.com/PaulStoffregen/Time
setSyncProvider(getTeensy3Time);
// Define a callback that will assign the correct datetime for any file system operations
// (i.e. saving a new audio recording onto the SD card)
FsDateTime::setCallback(dateTime);
mode = Mode::Ready;
}
void loop() {
// First, read the buttons
buttonRecord.update();
buttonPlay.update();
switch(mode){
case Mode::Ready:
delay(50);
// Falling edge occurs when the handset is lifted
if (buttonRecord.fallingEdge())
{
// Debug Statement
// Serial.println("Handset lifted");
mode = Mode:
rompting;}
else if(buttonPlay.risingEdge())
{
Serial.println("Play All Greetings");
playAllRecordings();
}
break;
case Mode:
rompting:// Wait a second for users to put the handset to their ear
delay(1000);
// Play the greeting inviting them to record their message
playWav1.play("greeting.wav");
// Serial.println("Greeting is playing");
// Wait until the message has finished playing
while (playWav1.isPlaying())
{
// Check whether the handset is replaced
buttonRecord.update();
buttonPlay.update();
// Handset is replaced
if(buttonRecord.risingEdge())
{
playWav1.stop();
// Serial.println("Stopped Playing Greeting");
mode = Mode::Ready;
// Comment out return it is not
// needed and it is bad form
return;
}
if(buttonPlay.fallingEdge())
{
playWav1.stop();
playAllRecordings();
}
}
// Greeting is finished and the handset is still offhook.
// Play the tone sound effect to notify
// Guest that recording has started
// Serial.println("Start Recording");
waveform1.frequency(440);
waveform1.amplitude(0.6);
wait(1000);
waveform1.frequency(0.0);
waveform1.amplitude(0);
// Start the recording function
startRecording();
break;
case Mode::Recording:
// Check whether the handset is replaced
buttonRecord.update();
handsetState = buttonRecord.read();
buttonPlay.update();
delay(10);
if(buttonRecord.risingEdge() || (handsetState > 0))
{
// Serial.println("Stopping Recording");
// Stop recording
stopRecording();
// Play audio tone to confirm recording has ended
waveform1.frequency(523.25);
waveform1.amplitude(1.0);
delay(100);
waveform1.amplitude(0);
delay(100);
waveform1.amplitude(1.0);
delay(100);
waveform1.frequency(0.00);
waveform1.amplitude(0);
mode = Mode::Ready;
}
else
{
// Serial.println("Continue Recording");
continueRecording();
}
break;
case Mode:
laying:break;
case Mode::Initializing:
break;
}
}
void startRecording() {
// Find the first available file number
for (uint8_t i=0; i<9999; i++) {
// Format the counter as a five-digit number with leading zeroes, followed by file extension
snprintf(filename, 11, " %05d.RAW", i);
// Create if does not exist, do not open existing, write, sync after write
if (!SD.exists(filename)) {
break;
}
}
frec = SD.open(filename, FILE_WRITE);
if(frec) {
Serial.println("Recording to ");
Serial.println(filename);
queue1.begin();
mode = Mode::Recording;
}
else {
Serial.println("Couldn't open file to record!");
}
}
void continueRecording() {
// Check if there is data in the queue
if (queue1.available() >= 2) {
byte buffer[512];
// Fetch 2 blocks from the audio library and copy
// into a 512 byte buffer. The Arduino SD library
// is most efficient when full 512 byte sector size
// writes are used.
memcpy(buffer, queue1.readBuffer(), 256);
queue1.freeBuffer();
memcpy(buffer+256, queue1.readBuffer(), 256);
queue1.freeBuffer();
// Write all 512 bytes to the SD card
frec.write(buffer, 512);
}
}
void stopRecording() {
// Stop adding any new data to the queue
queue1.end();
// Flush all existing remaining data from the queue
// Serial.println("Stopped recording");
while (queue1.available() > 0) {
// Save to open file
frec.write((byte*)queue1.readBuffer(), 256);
queue1.freeBuffer();
}
// Close the file
frec.close();
}
void playAllRecordings() {
// Recording files are saved in the root directory
File dir = SD.open("/");
while (true) {
File entry = dir.openNextFile();
if (!entry) {
// no more files
entry.close();
// Play audio tone to confirm Playback has ended
waveform1.frequency(523.25);
waveform1.amplitude(0.9);
wait(100);
waveform1.amplitude(0);
wait(50);
waveform1.amplitude(0.9);
wait(100);
waveform1.frequency(0.00);
waveform1.amplitude(0);
break;
}
int8_t len = strlen(entry.name());
if (strstr(strlwr(entry.name() + (len - 4)), ".raw")) {
// Serial.print("Now playing ");
// Serial.println(entry.name());
// Play a short beep before each message
waveform1.amplitude(0.5);
wait(250);
waveform1.amplitude(0);
// Play the file
playRaw1.play(entry.name());
mode = Mode:
laying;}
entry.close();
while (playRaw1.isPlaying()) {
buttonPlay.update();
buttonRecord.update();
// Button is pressed again
if(buttonPlay.risingEdge() || buttonRecord.fallingEdge()) {
playRaw1.stop();
mode = Mode::Ready;
return;
}
}
}
// All files have been played
mode = Mode::Ready;
}
// Retrieve the current time from Teensy built-in RTC
time_t getTeensy3Time()
{
return Teensy3Clock.get();
}
// Callback to assign timestamps for file system operations
void dateTime(uint16_t* date, uint16_t* time, uint8_t* ms10)
{
// Return date using FS_DATE macro to format fields.
*date = FS_DATE(year(), month(), day());
// Return time using FS_TIME macro to format fields.
*time = FS_TIME(hour(), minute(), second());
// Return low time bits in units of 10 ms.
*ms10 = second() & 1 ? 100 : 0;
}
// Non-blocking delay, which pauses execution of main program logic,
// but while still listening for input
void wait(unsigned int milliseconds) {
elapsedMillis msec=0;
while (msec <= milliseconds) {
buttonRecord.update();
buttonPlay.update();
// if (buttonRecord.fallingEdge()) Serial.println("Button (pin 0) Press");
// if (buttonPlay.risingEdge()) Serial.println("Button (pin 1) Press");
// if (buttonRecord.risingEdge()) Serial.println("Button (pin 0) Release");
// if (buttonPlay.fallingEdge()) Serial.println("Button (pin 1) Release");
}
}