Search found 206 matches
- Thu Mar 26, 2009 2:44 am
- Forum: Megadrive/Genesis
- Topic: Mickey Mania emulator comparison
- Replies: 67
- Views: 55935
So, I highly doubt there exists a "mode 2". No, there doesn't. It's much simpler than Charles describes. Never seen this problem before - and looking at the shots, and the description of what it's doing/what's happening... I have no idea at all why this wouldn't work in Fusion already. It must be a...
- Fri Feb 27, 2009 10:55 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
Personally, the think that irks me the most is the behaviour when the effective attack rate is 62 or 63. If it was just a matter of forcing the attenuation directly to 0 when the attack phase is entered with these rate values, well, that's one thing, but the "stalling" behaviour when changing to th...
- Fri Feb 27, 2009 2:57 am
- Forum: Regen
- Topic: Regen - Camera shy?
- Replies: 4
- Views: 8688
- Fri Feb 27, 2009 2:04 am
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
Ahh, but remember that the attenuation isn't moving past 0x200 during a repeating SSG-EG wave. Ah, this is what I meant, but I didn't explain it very well :) I was assuming the attenuation starts at 0x3FF, and is decremented until it hits 0x200 - at which point it will immediately switch to decay, ...
- Thu Feb 26, 2009 11:54 pm
- Forum: Demos
- Topic: Z80 driver - 4 channels player with volume control.
- Replies: 15
- Views: 12344
now it works, pretty nice, and quality is very good too :D Thanks :D Strangely the quality is better than my first driver which was using similar code at the same output rate :-/ :D I often find I write something better the second time around ;) Probably some bug, typo, or timing error that was too...
- Thu Feb 26, 2009 11:19 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
The samples are averaging together, which is why you're being left with a regular sine wave at mid-level. I did consider that, but since the sample rate is not divisible by the hardware output rate, I would have expected to see some clear distortion rather than an almost perfect wave - I can see th...
- Thu Feb 26, 2009 10:41 pm
- Forum: Video Display Processor
- Topic: HBlank Timings
- Replies: 163
- Views: 99554
I have another question about DMA Timings. Is it necessary to emulate dma transfert line per line or making all the transfert at start of dma and set the status flag to 0 after necessary cycles is sufficient? For normal ROM to VRAM DMA, the CPU is locked while it happens anyway, so you could get aw...
- Thu Feb 26, 2009 4:38 am
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
Care to share? Absolutely, happy to. It's to do with the inverting every cycle thing. I believe my tests were done with AR=0x0A, and one of the inverting patterns. I was looking at what I assume is an inverted attack, and it looks like a perfect sine wave at a constant volume. The samples you provi...
- Wed Feb 25, 2009 7:52 pm
- Forum: Demos
- Topic: Tiido's speech synthesizer 3
- Replies: 10
- Views: 8799
I think you should use phonemes of syllables rather than letters. Then speech will be more clear. A long time ago I did the same thing for russian... :D I've done this type of thing myself. One thing I've always meant to do, but never seem to get around to it, is to attempt to extract samples from ...
- Wed Feb 25, 2009 6:52 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
Hmm, that is strange. It looks like the one running at the higher frequency has some additional noise on the output signal. I'll take a look. It's probably writing to the DAC at around the same time the chip is trying to read it. I can't say I've done very thorough tests on this. I generally ran on...
- Tue Feb 24, 2009 11:15 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
What I did is to use the same increment values as when Rate is 0 (infinite rate) Indeed, it makes perfect sense. Can you confirm that output calculation also happen the same way with normal enveloppe ? Meaning that any change to internal attenuation level (for example on Key ON with AR=62,63) If wh...
- Tue Feb 24, 2009 11:26 am
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
- Tue Feb 24, 2009 7:51 am
- Forum: Demos
- Topic: Gameboy on 32X
- Replies: 77
- Views: 56740
- Mon Feb 23, 2009 9:00 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
1/ attack rate is set to 62 or 63: you say that the attenuation level is set to 0 but is the next enveloppe update done with Attack or Decay parameters ? Decay. Attack is skipped immediately in this case. 2/ SL is set to 0: does EG enter the susbtain phase once or does it directly jump to release ?...
- Mon Feb 23, 2009 7:30 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2332250
Wow, huge post :) Kind of odd that you would post this right now. I have a ton of SSG-EG samples I did years ago, but I lost the test ROMs that created them, so I didn't know what I was looking at. This weekend I found them and spent most of it looking into this again. I'll read your post properly l...