Harlem TIA

from Shakebit by Inverse Phase

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Track written in: Custom environment
Chip found in: Atari 2600, Atari 7800
Other names for chip: CTIA, GTIA, CO10444

Channels: 2 with selectable type for each (square/distortion/whitenoise)
4-bit volume, 5-bit pitch
Quirks: Atari only has 128 bytes of RAM, driving this chip has to suck.

Designed by Jay Miner, Atari's "Television Interface Adapter" chip doesn't just handle sound, it's also the video display for the Atari 2600, and it does joystick/paddle handling as well. There are 16 different "instruments" which are all permutations of squarewaves and whitenoise. Because of the way the chip calculates frequency, and because the bit depth of the frequency is so low, basically every "note" fails to line up with an actual piano note.

credits

from Shakebit, released April 1, 2013

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all rights reserved

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Inverse Phase Baltimore, Maryland

Chiptune/8-bit music and indie game composer.

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