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Overtone 32
https://forums.nesdev.com/viewtopic.php?f=6&t=13243
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Author:  tepples [ Sun Sep 13, 2015 7:20 pm ]
Post subject:  Overtone 32

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:
File comment: Play this on your PowerPak
overtone 32.nsf [6.14 KiB]
Downloaded 149 times
File comment: Vorbis encoded FamiTracker export
overtone 32.ogg [324.26 KiB]
Downloaded 155 times

Author:  rainwarrior [ Sun Sep 13, 2015 11:32 pm ]
Post subject:  Re: Overtone 32

Neat.

Author:  ionustron [ Tue Sep 22, 2015 7:25 pm ]
Post subject:  Re: Overtone 32

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.

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