Show HN: 8-bit Sounds – Studio2600 for the VCS (Atari 2600)

Re:Show HN: 8-bit Sounds – Studio2600 for the VCS (Atari 2600) by plaguuuuuu on Sunday April 29, 2018 @11:08PM (#16955396)

Can this chip only use the harmonic series as the tuning, or is it only specific to this rom's interface?

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Re:Show HN: 8-bit Sounds – Studio2600 for the VCS (Atari 2600) by masswerk on Monday April 30, 2018 @03:30AM (#16956523)

All frequencies are derived from an "about 30KHz"* base frequencies, which is divided the number of times given by the value in the 5-bit frequency register. (30KHz, 15KHz, ..., 30KHz/32) This "scale" is defined by hardware in the TIA Television Interface Chip (an Atari custom chip designed by Jay Miner), which is where all the "magic" of the VCS happens.

Edit: *) There is a 31,440 Hz clock frequency used to produce NTSC signals and 31,200 Hz for PAL consoles. This is probably also what is described as "about 30 KHz" in the manual.

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