Hello everyone!
This is a small audio-related project I wanted to show off, and that is controlling a tape deck with an Arduino from a Mac.
First, here is a demo video :3
This is how the controlling app looks like:
However most of the work is done on the Arduino itself. This is the code:
void sendByte(char data) {
/* A zero is represented by 0,7ms lo, followed by 0.35ms hi, a one is represented by 0,7ms lo, followed by 1,4ms hi */
for (byte mask = 00000001; mask>0; mask <<= 1) { //iterate through bit mask
up();
if (data & mask){ // if bitwise AND resolves to true
delayMicroseconds(1400);
}
else{ //if bitwise and resolves to false
delayMicroseconds(350);
}
down();
delayMicroseconds(700);
}
for (byte mask = 00000001; mask>0; mask <<= 1) { //iterate through bit mask
up();
if (data & mask){ // if bitwise AND resolves to true
delayMicroseconds(350);
}
else{ //if bitwise and resolves to false
delayMicroseconds(1400);
}
down();
delayMicroseconds(700);
}
}
/* Commands: Number buttons are like 0x00..0x09, so I cant be botherd to type them here */
char devid_laserdisk = 0xA8;
char devid_tuner = 0xA4;
char devid_cd = 0xA2;
char devid_tape = 0xA1;
char devid_amp = 0xA5;
char devid_vcr = 0xAB;
char command_levelup = 0x0A;
char command_leveldn = 0x0B;
char command_muting = 0x12;
char command_power = 0x1C;
char command_forward = 0x10;
char command_rewind = 0x11;
char command_stop = 0x16;
char command_pause = 0x18;
char command_play = 0x17;
char command_record = 0x14;
char command_eject = 0x51;
char command_program = 0x0D;
void down() { digitalWrite( 7, LOW ); }
void up() { digitalWrite( 7, HIGH ); }
void pioneer_init() {
down();
delayMicroseconds(9000);
up();
delayMicroseconds(5000);
down();
delayMicroseconds(700);
}
void setup()
{
pinMode( 7, OUTPUT );
Serial.begin(38400);
}
byte incomingByte = 0;
void serialEvent() {
if(Serial.available()) {
incomingByte = Serial.read();
if(incomingByte == 'P') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_play);
incomingByte = 0;
}
if(incomingByte == 'R') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_record);
incomingByte = 0;
}
if(incomingByte == 'S') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_stop);
incomingByte = 0;
}
if(incomingByte == 'H') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_pause);
incomingByte = 0;
}
if(incomingByte == 'F') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_forward);
incomingByte = 0;
}
if(incomingByte == 'B') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_rewind);
incomingByte = 0;
}
if(incomingByte == 'O') {
pioneer_init();
sendByte(devid_tape);
sendByte(command_power);
incomingByte = 0;
}
if(incomingByte != 0) { Serial.print(incomingByte);
Serial.print("?");
incomingByte = 0;
}
}
}
void loop(){}
The whole thing is also integrated with AIEdit, the tape recorder app:
For more info, see the github project: GitHub - vladkorotnev/TapeStuff: Integrating cassettes for the sake of music
However, it still has a problem — I have to send all the commands twice (for example, to make it play, I need to send “PP” to arduino instead of just “P”, and such). Not sure what did I do wrong so if anyone has a suggestion, that would be much appreciated!
Thanks for reading! ???
