OK so I am working on a project where I need some basic audio recordings. I have downloaded the library provided at GitHub - TMRh20/TMRpcm: Arduino library for asynchronous playback of PCM/WAV files direct from SD card. Arduino Uno,Nano,Mega etc supported. When running the Recording.ino sketch I get the following compilation error:
Recording:55: error: 'class TMRpcm' has no member named 'startRecording'
case 'r': audio.startRecording("test.wav",16000,A0); break; //Record at 16khz sample rate on pin A0
^
Recording:56: error: 'class TMRpcm' has no member named 'startRecording'
case 'R': audio.startRecording("test.wav",16000,A0,1); break; //Record, but with passthrough to speaker.
^
Recording:57: error: 'class TMRpcm' has no member named 'startRecording'
case 't': audio.startRecording("test.wav",16000,A0,2); break; //Do not record. Output direct to speaker
^
Recording:60: error: 'class TMRpcm' has no member named 'stopRecording'
case 's': audio.stopRecording("test.wav"); break; //Stop recording
^
exit status 1
'class TMRpcm' has no member named 'startRecording'
I opened up the header file and commented out the #if define lines and it seems to compile beyond that point but I receive a new error now. The new error states that I have an undefined reference to the methods provided in the header file. The sketch that I am compiling is provided below. Note I did not write any of this code, and the only edit I made was a comment in the header file. Any insight on the situation will be greatly appreciated! Thank you everybody!
/*
This sketch demonstrates recording of standard WAV files that can be played on any device that supports WAVs. The recording
uses a single ended input from any of the analog input pins. Uses AVCC (5V) reference currently.
Requirements:
Class 4 or 6 SD Card
Audio Input Device (Microphone, etc)
Arduino Uno,Nano, Mega, etc.
Steps:
-
Edit pcmConfig.h
a: On Uno or non-mega boards, #define buffSize 128. May need to increase.
b: Uncomment #define ENABLE_RECORDING and #define BLOCK_COUNT 10000UL -
Usage is as below. See Advanced Features · TMRh20/TMRpcm Wiki · GitHub for
additional informaiton.
Notes: Recording will not work in Multi Mode.
Performance is very dependant on SD write speed, and memory used.
Better performance may be seen using the SdFat library. See included example for usage.
Running the Arduino from a battery or filtered power supply will reduce noise.
*/
#include <SD.h>
#include <SPI.h>
#include <TMRpcm.h>
#define SD_ChipSelectPin 53 //example uses hardware SS pin 53 on Mega2560
//#define SD_ChipSelectPin 4 //using digital pin 4 on arduino nano 328, can use other pins
TMRpcm audio; // create an object for use in this sketch
void setup() {
audio.speakerPin = 11; //5,6,11 or 46 on Mega, 9 on Uno, Nano, etc
pinMode(12,OUTPUT); //Pin pairs: 9,10 Mega: 5-2,6-7,11-12,46-45
Serial.begin(115200);
if (!SD.begin(SD_ChipSelectPin)) {
return;
}else{
Serial.println("SD OK");
}
// The audio library needs to know which CS pin to use for recording
audio.CSPin = SD_ChipSelectPin;
}
void loop() {
if(Serial.available()){ //Send commands over serial to play
switch(Serial.read()){
case 'r': audio.startRecording("test.wav",16000,A0); break; //Record at 16khz sample rate on pin A0
case 'R': audio.startRecording("test.wav",16000,A0,1); break; //Record, but with passthrough to speaker.
case 't': audio.startRecording("test.wav",16000,A0,2); break; //Do not record. Output direct to speaker
//Note: If samples are dropped before writing, it
// will not be heard in passthrough mode
case 's': audio.stopRecording("test.wav"); break; //Stop recording
case 'p': audio.play("test.wav"); break; //Play the recording
case '=': audio.volume(1); break; //Increase volume by 1. Does not affect recording
case '-': audio.volume(0); break; //Decrease volume by 1. Does not affect recording
case 'S': audio.stopPlayback(); break; //Stop all playback
}
}
}