Recent HN: eight-bit Sounds – Studio2600 for the VCS (Atari 2600)
Instructions
Transfer the joystick (cursor keys) spherical the grid to pick tone (vertical axis) and frequency (horiziontal axis, values Zero…31). Press the button (house bar) to play.
Exercise Protect and Reset switches (F11, F12) to change the audio volume.
(Keyboard settings within the emulator could vary for within the neighborhood saved presets. You need to reset these by the “Benefit & Settings” menu [Controllers / Defaults] available by the gears icon on the bottom precise nook of the emulation. You need to emulate a conventional rhythm by the turbo fireplace feature off, in most cases mapped to DEL, and adjust the BPM by its repeat frequency within the “Like a flash Alternate choices”.)
About
Right here’s a minute test application I wrote to explore sound on the Atari VCS / Atari 2600. The guidelines equipped by the
Stella Programmer’s Data is a tiny bit fright:
TIA Registers AUDC0, AUDC1
| Hex | D3 | D2 | D1 | D0 | Form of noise or division |
|---|---|---|---|---|---|
| Zero | Zero | Zero | Zero | Zero | feature to 1 |
| 1 | Zero | Zero | Zero | 1 | Four bit poly |
| 2 | Zero | Zero | 1 | Zero | div 15 -> Four bit poly |
| three | Zero | Zero | 1 | 1 | 5 bit poly -> Four bit poly |
| Four | Zero | 1 | Zero | Zero | div 2 : pure tone |
| 5 | Zero | 1 | Zero | 1 | div 2 : pure tone |
| 6 | Zero | 1 | 1 | Zero | div 31 : pure tone |
| 7 | Zero | 1 | 1 | 1 | 5 bit poly -> div 2 |
| eight | 1 | Zero | Zero | Zero | 9 bit poly (white noise) |
| 9 | 1 | Zero | Zero | 1 | 5 bit poly |
| A | 1 | Zero | 1 | Zero | div 31 : pure tone |
| B | 1 | Zero | 1 | 1 | feature final Four bits to 1 |
| C | 1 | 1 | Zero | Zero | div 6 : pure tone |
| D | 1 | 1 | Zero | 1 | div 6 : pure tone |
| E | 1 | 1 | 1 | Zero | div 93 : pure tone |
| F | 1 | 1 | 1 | 1 | 5 bit poly div 6 |
So, right here they are: The entire sounds there are on the VCS, united on a funky display conceal, prepared to be explored. Please mind that the frequences consequence from divisions of a crude frequency and are no longer exactly chromatic tones. Moreover, some « sounds » (Zero, “feature to 1”, and B, “feature final Four bits to 1”) are it sounds as if fair providing interior efficiency and enact no longer salvage an audible noise or tone.
Downloads
Atari 2600 sport ROM image recordsdata:
This application has been developed as portion of my venture for RetroChallenge 2018/04.
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