Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-22, 02:56

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

sfz is basically a new version of sf2, just a flat filesystem instead of a packed riff archive. Its one of the reasons I like it, because all you need to make an sfz is a pile of wave files and a text editor. LN

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Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-22, 00:07

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

mattw wrote on 2020-12-21, 22:37: it could be a better fit, but with what synth engines that SFZ will work? There's a number of sfz-capable synth engines, most are listed on https://sfzformat.com/software/players/ LN

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Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-21, 22:22

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

Is the writeup about the reverse-engineered 94I/94B format available somewhere? I was wondering if the SFZ format (https://sfzformat.com/) could better represent 94I/94B format instruments than the SF2 format. LN

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Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-21, 08:25

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

S-5xx RE: https://nc.rysk.us/s/nKxiF33Wwx4dQiD S-7xx RE: https://nc.rysk.us/s/g64kFwpNP32H64B I last worked on those documents in 2018. you posted the same document twice, I presume that's an unintended mistake. in any way those things are more complicated than i expected. so many parameters... …

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Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-21, 05:55

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

All of this TVF/TVA with "5 segments" stuff reminds me of the Roland S-5xx and S-7xx sampler formats, which used floppy disks, and I guess were an ancestor/co-developed evolution of this format stuff. S-550 was made in 1988, S-770 was 1989. S-5xx IIRC has 8 segments each with a 'level' and 'rate' …

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Re: About Roland Virtual Sound Canvas 3

Posted on 2020-10-05, 22:46

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

For the Roland LA32 PCM roms, the scrambling is consistent across the MT-32, D-50, CM-32L, LAPC-I, D-10/110, D-20/220, and is: rawSample = BITSWAP16(rawSample, 15, 6, 14, 13, 12, 11, 10, 9, 8, 5, 4, 3, 2, 1, 0, 7); This is using the BIT and BITSWAP macros from the older C versions of MAME (this …

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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Posted on 2019-04-07, 22:34

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

AFAIK there's a bunch of differences between the NCR8496 and PSSJ, vs the SN76489/89A/96, but it boils down to a few things, I believe: 1. The Noise channel LFSR is significantly different; on SN76489/89A/96/etc the LFSR (assuming a leftward-shifting Fibonacci LFSR where bit 0 is the rightmost bit, …

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Re: Munt Reloaded - Development

Posted on 2018-10-22, 06:22

by

by Lord Nightmare

in MT-32 Development

in MT-32 Development

I threw this together a few months ago, and it decodes/descrambles the PCM roms using 32767.0 rather than 32787.0. I'm curious if the latter being 'correct' is a silicon bug in the LA32... https://www.dropbox.com/s/q0z01e4t7ov4w3h/la3 … pleparse.c?dl=1 License is GPLV2.

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Re: Munt Reloaded - Development

Posted on 2018-10-08, 03:39

by

by Lord Nightmare

in MT-32 Development

in MT-32 Development

If anyone wants to see a decap image, here you go: https://dl.dropbox.com/s/ellocl0ig0dfc9v/LA32_die_higher-res_3.jpg?dl=1 This is not perfect, but I was able to image it well enough to extract the ROM tables. These are nearly identical to the Yamaha OPL2/3 tables from https://docs.google.com/ …

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Re: Munt Reloaded - Development

Posted on 2018-10-08, 02:32

by

by Lord Nightmare

in MT-32 Development

in MT-32 Development

HunterZ wrote: Nice! You should consider putting the dumps on the Internet Archive so they can be preserved. I'd love to see these sample roms as well, if possible. EDIT: Ok, I get it, no asking for roms on this forum. LN

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Re: Double score: CMS and prototype SB1.0

Posted on 2018-08-12, 06:51

by

by Lord Nightmare

in Marvin \ System Specs

in Marvin \ System Specs

I've purchased the CMS and prototype board from Anonymous Freak. They are currently living on in my 286 which you can read about in the System Specs forum. :) But for those who asked, here are the contents of the floppies: http://dl.dropbox.com/u/9151127/CMS/CMS-Song1.zip http://dl.dropbox.com/u/ …

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Re: Note FM Tracker

Posted on 2018-05-14, 23:32

by

by Lord Nightmare

in Milliways

in Milliways

Note - FM music tracker Korean program for FM Operator Type L music creation - OPL3 Tracker Used in Korean demoscene, has the ability to use true OP4 instruments and works with IMS, SOP formats Created by Lee Ho Bum (sopepos / yihobeom) 1995, 1997 Download [ Note BETA 2 ] Update 01 [ fm_player ] …

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Re: YMF262 design flaw

Posted on 2017-07-12, 19:15

by

by Lord Nightmare

in Marvin \ Sound

in Marvin \ Sound

CR1901 did something similar for the ym2151, although that trace is not complete yet. (trying to figure out how the LFO LFSR works in AM and PM mode..) See https://github.com/cr1901/ym2151-decap Any chance you can post your marked up svgs from inkscape somewhere? LN

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Re: Does Anyone know specific differences between the NES revisions?

Posted on 2017-05-25, 06:49

by

by Lord Nightmare

in Milliways

in Milliways

http://forums.nesdev.com/ is almost certainly the correct place, probably the "NES Hardware and Flash Equipment" subforum. LN

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Re: CMS/GameBlaster emulation thread

Posted on 2017-01-26, 00:05

by

by Lord Nightmare

in PC Emulation

in PC Emulation

Jepael: I updated the saa1099 core in MAME to use the correct lfsr polynomial: https://github.com/mamedev/mame/commit/c11c22b3e83bdf7ac8d48f0a8e3be48ba31786f8 I also added a note about the fact that if the noise channels are set to be clocked by a tone channel, and the 0x1c bit 1 reset bit is set, …

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Re: xBRZ - High quality image scaling support for DOSBox

Posted on 2015-12-24, 16:21

by

by Lord Nightmare

in DOSBox Patches

in DOSBox Patches

Well, that's a start, at least. The post looks similar to the one that was deleted with a forum purge at byuu's old forums, but looks only about 1/2 complete description of the algorithm. What I find far more useful however is that Hyllian seems to have relicensed about half of the xBR code at …

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Re: xBRZ - High quality image scaling support for DOSBox

Posted on 2015-10-04, 15:59

by

by Lord Nightmare

in DOSBox Patches

in DOSBox Patches

That sounds vaguely correct but I'm not 100% sure. It still would prevent anyone who needs GPLV2 binaries from using the code, though. I've been informed that the Hyllian-created xBR code specifically in ffmpeg is licensed LGPLv2.1 so using that specific implementation of xBR is GPLV2 compatible. …

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Re: xBRZ - High quality image scaling support for DOSBox

Posted on 2015-10-04, 01:21

by

by Lord Nightmare

in DOSBox Patches

in DOSBox Patches

This may be true, except to the best of my knowledge as you point out, DOSBox is 'GPLV2+', i.e. GPLV2 with the "or (at your option) any later version." clause left intact. However, as a whole, DOSBox is licensed (currently) GPLV2, so any xBR/xBRZ stuff which is licensed either GPLV3 or LGPLV3 is …

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Re: xBRZ - High quality image scaling support for DOSBox

Posted on 2015-09-30, 01:05

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by Lord Nightmare

in DOSBox Patches

in DOSBox Patches

My main problem with the hqx and especially xbrz scalers in general is not lack of technical merit on the part of the scalers: It is the fact that all of them (except for some clean-room rewritten-from-math versions) are licensed in such a way as to make it difficult or impossible to use them in …

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Re: IPF support

Posted on 2015-09-11, 02:20

by

by Lord Nightmare

in DOSBox Development

in DOSBox Development

As mentioned before, the IPF decoder library has a notoriously restrictive license. As mentioned earlier in the thread, this is why Olivier Galibert of the MESS team "black-box" reverse-engineered it as a work-around. http://git.redump.net/mame/tree/src/lib/formats/ipf_dsk.c http://git.redump.net/ …

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