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.
Overtone 32
Moderator: Moderators
Overtone 32
- Attachments
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- overtone 32.ftm
- (3.75 KiB) Downloaded 444 times
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- overtone 32.nsf
- Play this on your PowerPak
- (6.14 KiB) Downloaded 601 times
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- overtone 32.ogg
- Vorbis encoded FamiTracker export
- (324.26 KiB) Downloaded 623 times
- rainwarrior
- Posts: 8731
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Re: Overtone 32
Neat.
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.
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.