Apart from the most annoying song example (showed the lyrics example well though), that example is good. I like the quaility of this, that is why I am drawn to it.
Yes, I can have someone's vioce on a project with the wave shield but with this I can have their voice in 320kbs!
Are the lyrics done with reading a time on the song? That is rather cool!
This sketch randomly plays all the songs in a folder. You can control the volume, play/pause/stop/next, and ff/rew using serial input (from the IDE).
Throw a bunch of your favorite holiday songs in a folder named "XMAS" on your SD card, stick it in the rMP3, and run the sketch.
I haven't got around to building a tree light sequencer to run at the same time as the songs are playing. Maybe Grumpy_Mike will lend me his Tree-Sink. ;D
Happy Holidays everyone!
b
#include <RogueSD.h>
#include <RogueMP3.h>
#include <NewSoftSerial.h>
NewSoftSerial rmp3_serial(6, 7);
RogueMP3 rmp3(rmp3_serial);
RogueSD filecommands(rmp3_serial);
int numberOfSongs;
int lastSong;
char path[96];
const char *directory = "/XMAS";
void setup()
{
Serial.begin(9600);
Serial.println("Merry Xmas!");
rmp3_serial.begin(9600);
rmp3.sync();
rmp3.stop();
filecommands.sync();
// mix up our random number generator
randomSeed(analogRead(0));
// get the number of songs available
strcpy(path, directory);
strcat(path, "/");
strcat(path, "*.mp3"); // we have to do this because the IDE thinks that "/*" needs to be terminated everywhere
numberOfSongs = filecommands.filecount(path);
lastSong = -1;
}
void playNextSong()
{
uint8_t i;
char filename[80];
char path[96];
int nextSong = 0;
if (numberOfSongs > 0)
{
// Select our next song randomly
if (numberOfSongs > 2)
{
do
nextSong = random(numberOfSongs);
while (nextSong == lastSong);
}
else if (numberOfSongs == 2)
{
// we only have two songs
if (lastSong == 0)
nextSong = 1;
else
nextSong = 0;
}
// now, get our file name from file list
filecommands.opendir(directory);
for (i = 0; i <= nextSong; i++)
{
filecommands.readdir(filename, "*.mp3");
}
strcpy(path, directory);
strcat(path, "/");
strcat(path, filename);
rmp3.playfile(path);
Serial.print("Playing: ");
Serial.println(path);
lastSong = nextSong;
}
else
{
Serial.println("No files to play.");
}
}
void loop()
{
char c;
uint8_t i;
int16_t newtime;
playbackinfo playinfo;
char status = 'S';
uint8_t playing = 1;
uint8_t volume = 20;
uint8_t boostOn = false;
volume = rmp3.getvolume(); // this only gets the left volume
playNextSong();
while(1)
{
while(!Serial.available())
{
// we should do fancy stuff like flash lights on our Xmas tree here!
// got lots of time!
delay(200);
status = rmp3.getplaybackstatus();
playinfo = rmp3.getplaybackinfo();
if (status == 'S' && playing)
playNextSong();
}
// OOH!! got a character!
c = Serial.read();
switch(c)
{
case 'p':
// pause
if(status == 'D')
{
// fade in
rmp3.playpause();
rmp3.fade(volume, 400);
}
else if(status == 'P')
{
// fade out
rmp3.fade(100, 400);
rmp3.playpause();
}
else
{
// start playing
playNextSong();
playing = 1;
}
break;
case 's':
rmp3.stop();
playing = 0;
break;
case 'n':
playNextSong();
playing = 1;
break;
case 'e':
if(boostOn)
{
rmp3.setboost(0);
boostOn = false;
}
else
{
rmp3.setboost(8, 6, 7, 3);
boostOn = true;
}
break;
case 'a':
// jump back 5 seconds
newtime = playinfo.position - 5;
if (newtime < 0) newtime = 0;
rmp3.jump(newtime);
break;
case 'd':
// jump forward 5 seconds
rmp3.jump(playinfo.position + 5);
break;
case 'k':
if(volume < 254) volume++;
if(status != 'D') rmp3.setvolume(volume);
break;
case 'i':
if(volume > 0) volume--;
if(status != 'D') rmp3.setvolume(volume);
break;
}
}
}
I'm currently trying to use the rMP3 shield with the DFRduino LCD Keypad shield. The problem is, while rMP3 uses digital pins 6, 7, 8, 11, 12 & 13, the LCD shield uses 5, 6, 7, 8 & 9. Therefore, I'd like to reroute pins 6, 7 & 8 to use pins 3, 4 & 10 by cutting the jumpers and wiring them up. So far, so good. The problem I have, though, is that I can't seem to work out how I'd let the C compiler know of the change. There aren't any obvious locations in the C file or associated header and I can't see any mention of this in the documentation. Could you please give me a clue as to how I would do this?
I have not really delved into how it does what it does but I presumed that it just could use those other pins.
Isn't the communication via serial? In which case it would require 2 pins?
Also another question, I know that the LED on board (activity LED) flashes when music is playing and seems to brighten at corresponding points in the music. Is there any easy way to get audio values sent to the arduino so a visualiser could be done from it?
Lee - The rMP3 only uses 2 serial pins to communicate. The SPI port is there as an optional way to control the rMP3, but the current version of firmware (100.01) hasn't got that implemented (expect it in the next version).
You figured out how to do the serial change though. Just cut the jumper at pins 6 (rMP3 TX) and 7 (rMP3 RX), and reroute the pads to the new pins you want to use. (make sure you connect wires to the pads FURTHEST of the two from the Arduino header).
The change in the code should be really simple. Wherever you see:
NewSoftSerial rmp3_serial(6, 7);
change it to (in your case):
NewSoftSerial rmp3_serial(3, 4);
(I'm assuming that you changed pin 6 on the rMP3 to pin 3, and pin 7 to pin 4).
If that doesn't work, post your code and we can see what's going on.
mowcius - sounds like either you're listening to a VBR mp3 file (wide range one too! 32 kbps -> 320 kbps) and the music has really quiet and really loud spots, or your eyes are fooling you! The data goes directly from the card to the decoder. So, the only effect you'd see is if the MP3 frames had different bitrates.
RE: documentation, our wikidocs have always been public, unfortunately you had to register. I've changed it now so that you don't have to register. Just add any comments/questions you have on any page that has a discussion.
mowcius - sounds like either you're listening to a VBR mp3 file (wide range one too! 32 kbps -> 320 kbps) and the music has really quiet and really loud spots, or your eyes are fooling you! The data goes directly from the card to the decoder. So, the only effect you'd see is if the MP3 frames had different bitrates.
I was indeed! I hadn't noticed that it didn't change with non VBR files. It was only on the loud bits that I got brighter flashes...
Any chance you could do the Input/Output Interface page on the wiki?
The rest of the documentation does indeed look good, it has been a while since I have looked and I suppose I did not have a great look through.
I have just gone through and had a thorough read! Interesting stuff!
Now back to my previous question
Is there any easy way to get audio values sent to the arduino so a visualiser could be done from it?
It is not a problem if not, it would just be interesting to do it without all the extra circuitry it usually requires.
L and R provide accurate activity for that sort of thing Why not branch from there for both output and route to analog input in the Arduino? I don't know what the upper or lower values for those pads are (maybe in the docs?), but it's surely a valid option. Just make sure it doesn't exceed the pins impedance.
You mean speaker L & R?
That requires all the annoying circuitry in between to get that to work...
I suppose i am more asking about a frequency visualiser which is more complicated...
Not necessarily. The analog input in the Arduino can take any value between 0v - 1v (I believe), so, as long as you limit the voltage (using the correct resistance), then you have a simple variable source right there. The biggest issue is making sure your querying of that source doesn't use the potential that would otherwise drive your speaker output (though you could increase that with an amp).
Yeah, 5v... That's what I meant Well, you're okay, then, seeing as 5v is the maximum voltage anywhere past the regulator! Hook even one of those pads into the Arduino and use it as an input. Actually, you could also average the highs and lows so as to get better results, as those highs and lows will be quite similar in value.