Overtone 32

Discuss NSF files, FamiTracker, MML tools, or anything else related to NES music.

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tepples
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Overtone 32

Post by tepples » Sun Sep 13, 2015 7:20 pm

What makes the NES triangle wave distinctive is its stepwise nature, which creates 31st and 33rd harmonics. For example, the lowest note the triangle wave channel can play is also the lowest A on an 88-key piano, or 27.5 Hz. But because of its 16-level, 32-step, sample-and-hold waveform (FEDCBA98765432100123456789ABCDEF), there are prominent harmonics at 852.5 Hz and 907.5. This creates a net effect of a pitch 32 times the fundamental frequency, and log[2](32) = 5, this sounds five octaves up.

The following piece was composed in FamiTracker and is best heard through dinky little laptop speakers that filter out the triangle's fundamental.
Attachments
overtone 32.ftm
(3.75 KiB) Downloaded 310 times
overtone 32.nsf
Play this on your PowerPak
(6.14 KiB) Downloaded 466 times
overtone 32.ogg
Vorbis encoded FamiTracker export
(324.26 KiB) Downloaded 481 times

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rainwarrior
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Re: Overtone 32

Post by rainwarrior » Sun Sep 13, 2015 11:32 pm

Neat.

ionustron
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Re: Overtone 32

Post by ionustron » Tue Sep 22, 2015 7:25 pm

That's a nice idea!

With a tiny dpcm sample for another high octave c scale, you could prolly make some quiet 4-tone chords. Like, shifting pulse/pcm triads quietly over a sustained bass/high note drone as a song intro or segue.

tepples
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Re: Overtone 32

Post by tepples » Sun Mar 17, 2019 6:35 am

Update: Attached the FTM file

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