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Found 3 results

  1. Can someone clearly explain the bit pattern for TIA audio distortions 2 and 3? This is what I know so far: Distortion 2: 001010000111011->0100000000000000000100000000000 (465 bits long) Distortion 3: 001010000111011->0010110011111000110111010100001 (465 bits long) These are named "DIV31_POLY4" and "POLY5_POLY4" in the tiasound.c document. <http://web.archive.org/web/20120705120940/http://mamedev.org/source/src/emu/sound/tiasound.c> What exactly is going on here? Also, I noticed that distortion 11 is called "POLY5_POLY5", even though it makes no sound (same as distortion 0). Any reason that name was chosen? The only reason I can think of is that it matches up with distortions 2, 3, and 10: 2 = "DIV31_POLY4" 3 = "POLY5_POLY4" 10 = "DIV31_POLY5" 11 = "POLY5_POLY5"
  2. Is anyone else running into audio/video popping when using a Suncom Tac2 with a Sears Video Arcade II? It only happens when I press the orange buttons on either side of the controller. The 4 switch woody 2600 I have has no issues with it. I wonder if it's a power/feedback issue with that specific model. It's kind of comical to watch the screen jump and audio crackle in Berzerk every time you shoot an alien. Also the regular Atari controllers (cx-40?) do not have the issue. I am using a non-Atari branded 9VDC 1A adapter with polarity like (-)-©-(+). Wondering if maybe it's a power issue, although the Arcade II exhibits no other problems with any other devices. There seems to be zero consensus on what the ideal V/A or even polarity or AC/DC should be on these forums and interwebs for this console but I do believe it has to have a bridge rectifier if it can handle both VDC and VAC adapters. I just got this unit with the Tac2 over the weekend locally so I have no idea if it ever didn't do this with the tac2. My guess is it's just the fact that it's a clone that wasn't completely vetted with 3rd party accessories since it was originally destined to be the 2800 in Japan.
  3. Hi! I have an Atari 800XL. First time user. I am having an issue. POKEY sounds are VERY distorted. They seem to be playing just fine, but certain sounds are badly distorted. I hear that the stereo POKEY mod helps the sound, but I want to keep this machine mono, as it would be worthless upgrading a US machine to Stereo. I soldered the RCA jack to from audio to audio out and ground to ground on the DIN monitor pins. using the internal amp keeps the issues, even connecting DIRECTLY to the POKEY gives distortion. Using a 0.75uF bipolar cap doesn't help at all. low or high volume on speakers, still distortion. adding various resistors, still distortion, but the audio is quieter. I've enclosed a recording of Szczur, by Grzegorz Kwiatek, as this song is the best example for what I am expiriencing. Thanks. (Please not that I am a beginner with the Atari 8-bit line) Atari Distortion.mp3
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