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Music playing nxt 
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Joined: Wed Feb 08, 2012 8:28 pm
Posts: 13
Post Music playing nxt
I am trying to use the sound function on the NXT to make it play the super marios theme song. Does anybody have any idea what the code would look like. I have programed a lot of other things but i have never really messed with sound. Thanks,

Mon Feb 13, 2012 12:25 pm

Joined: Fri Jan 27, 2012 6:57 pm
Posts: 40
Post Re: Music playing nxt
Here is a ROBOTC program I made a while ago to play the Mario theme on the VEX Cortex.
Also, here is a midi file and the resulting converted rmi file (used BricxCC) that both contain the Mario theme. The rmi file should play on the NXT (though I haven't tested it):

MarioSpeakerTest.c [9.7 KiB]
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Mon Feb 13, 2012 12:56 pm

Joined: Wed Feb 08, 2012 8:28 pm
Posts: 13
Post Re: Music playing nxt
Thanks a lot that helped out

Mon Feb 13, 2012 1:37 pm
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Joined: Tue Sep 14, 2010 9:19 pm
Posts: 496
Post Re: Music playing nxt
If you don't want to write your own sound output function, like sumasmreq did, you can use ROBOTC's built in tone function:
void PlayTone(const int frequency, const int durationIn10MsecTicks)

sudo rm -rf /

Mon Feb 13, 2012 3:36 pm

Joined: Thu Jan 03, 2013 5:10 pm
Posts: 186
Location: The plateau north of the Ohio River Valley, also known as Cave Country.
Post Re: Music playing nxt
Just some music theory:

The lowest A on a piano has a frequency of 220. Every octave up, the frequency of a note doubles. Since there are 12 notes per octave, this means that to calculate the frequency of the nth note on a keyboard, you would use this:

short notefreq(short notenum)
return round(pow(220,(notenum+12)/12));

where the lowest A is notenum zero.

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Fri Jan 04, 2013 7:53 pm
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