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Microcontroller Programming » Playing different music with the MCU

April 05, 2011
by lnino
lnino's Avatar

Hi at all.

I tried to make some sound with the Tutorial "Making Sound with a Microcontroller" and I was successful with playing the Happy Birthday melody.

Now I thought it would be nice to play a different sound, but I have now clue about how to interpret the music. Where do I get the A5, D5,..... and so on from?

I thought about doing theme music of monkey island, maniac mansion, leisure suite larry. Is there a way to get those A5, D5,... or exists a programm which can filter those after playing such a theme?

Thanks for the help.

April 05, 2011
by hariharan
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Inino, If you are talking about the notes, then the website is http://www.phy.mtu.edu/~suits/notefreqs.html when you get the frequency, do 1000000/2/the frequency. for example, if the frequency is 1000 hz, do 1000000/2/1000 which is 500. What you found is the half period of the frequency.

April 05, 2011
by lnino
lnino's Avatar

Thanks for your reply hariharan.

What I meant is, how do I realize it when I have somehting like this? HERE THERE

Or how would be the procedure, when I say: "I want my microcontroller to play Indiana Jones, or Monkey Island". What steps do I have to do? Because I am no musician I am a little bit helpless.

Maybe somebody is here to be able to help me out.

April 05, 2011
by bretm
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Wikipedia image

This shows the notes C4 through C5 (and then back down to C4 again) as shown on a treble clef. Does that help?

It goes C4, D4, E4, F4, G4, A4, B4, C5, B4, A4, G4, F4, E4, D4, C4 in the picture.

April 06, 2011
by lnino
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Hi bretm,

thanks for the reply. That helped a lot.

Now I have another question:

Why the word Happy has only one D5 in the "Making Sound with a Microcontroller" Tutorial?

lcd_quick_clear_and_home();
lcd_write_string(PSTR("  Happy ")); play_tone(D5, DUR);
lcd_write_string(PSTR("birth"));    play_tone(E5, DUR);
lcd_write_string(PSTR("day ")); play_tone(D5, DUR);
lcd_write_string(PSTR("to "));  play_tone(G5, DUR);
lcd_write_string(PSTR("you ")); play_tone(Fsh5, 2*DUR);

On the screenshot below Happy has two notes. In this case Happy Birthday is written in a different way. So "Happy Birthday To You" in this case would be G4 A4 G4 C5 B4. Right?

Because I am no musician I don't know why this is handled like that.

How should be such double notes interpreted?

Because in some themes I would like to realize are many of them. And do I have to think about how long every note should be played?

Happy Birthday

Maybe somone has an idea.

Thanks a lot.

April 07, 2011
by lnino
lnino's Avatar

Hi at all.

I got now a little bit more familiar with programming sounds on the MCU. I was now able to get "The Final Countdown" working. It's not perfect, but it was a quite nice learning effect.

Have fun.

    // Final Countdown
    play_tone(Csh6, DUR/2);
    play_tone(B5, DUR/2);
    play_tone(Csh6, DUR/2);
    play_tone(Fsh5, 2*DUR);

    play_tone(D6, DUR/2);
    play_tone(Csh6, DUR/2);
    play_tone(D6, DUR/2);
    play_tone(Csh6, DUR/2);
    play_tone(B5, 2*DUR);

    play_tone(D6, DUR/2);
    play_tone(Csh6, DUR/2);
    play_tone(D6, DUR/2);
    play_tone(Fsh5, 2*DUR);

    play_tone(B5, DUR/2);
    play_tone(A5, DUR/2);                   
    play_tone(B5, DUR/2);
    play_tone(A5, DUR/2);
    play_tone(Gsh5, DUR/2);
    play_tone(B5, DUR/2);
    play_tone(A5, 2*DUR);

    play_tone(Gsh5, DUR/2); 
    play_tone(A5, DUR/2);
    play_tone(B5, 2*DUR);

    play_tone(A5, DUR/2);
    play_tone(B5, DUR/2);
    play_tone(Csh6, DUR/2); 
    play_tone(B5, DUR/2);
    play_tone(A5, DUR/2);
    play_tone(Gsh5, DUR/2);
    play_tone(Fsh5, 2*DUR);

    play_tone(D6, 2*DUR);   
    play_tone(Csh6, 2*DUR);

    play_tone(Csh6, DUR);
    play_tone(Csh6, DUR);
    play_tone(D6, DUR);
    play_tone(Csh6, DUR/2);
    play_tone(B5, DUR/2);
    play_tone(Csh6, 2*DUR);
April 07, 2011
by bretm
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Well done.

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