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Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-25, 21:04

while as per my previous post I don't know if any 94B effort is pointless or not, I found this difference with SF2 and just for a sake of documentation I am putting it here: SF2 files got real ADSR-Envelopes - The Dream chip uses multistage Envelope. The SF2 ADSR Envelopes don't have a start level, …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-22, 05:06

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 that sounds disorganized to me by comparison, tbh, but not unworkable. Whatever the …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-22, 01:45

AFAIK, nothing about 94I/94B format is available, that's why I got interested in the option of reverse-engineer it, because there are people who basically swear that "GSSBK320.94B" is sounding exactly the same as SC-55: I'm curious what the purpose of this is? I can't find anything worth using that …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-20, 13:19

@kitrinx: Could you please expand your table so it also includes all variation presets? I think the settings with index 11 and 12 are TVP LFO rate (vibrato rate) and TVP LFO delay (vibrato delay), and I also suspect the Sound Canvas range emulates instruments with a detuned component or other form …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-18, 12:11

Default auto-bend settings, for making those instruments more realistic , perhaps? Consists of a bend rate and bend depth pair. The parameter does not officially exist on Sound Canvasses, but does exist (and usually is editable) in almost all other Roland TVA/TVF-based romplers... I'm not sure. It …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-18, 04:08

So each partial has a set of attributes associated with it that basically sets the default sound of a preset. AFAIK, it's similar on JV-80 etc. synths, and in those the rate(s) at which the user-controllable parameters affect the preset sound is basically baked into the preset. Although apparently …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-17, 15:15

ok, I think then I can look at it and try to locate (at least some of) the things you located in SC-55 control rom. From a cursory inspection I saw names present at 0x30000 but they seem to be a different size than sc55 presets, they might be just names or display data here or possibly sample/ …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-16, 21:03

So, SCC-1, SCB-55, SC-55/MKII are all using the exact same scrambling. BTW, have you looked at SC-88, I found the scrambling: https://www.vogons.org/viewtopic.php?p=918028#p918028 but I haven't looked at the control rom at all. Yes. In fact I think there is actually only two *real* sets of wave …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-16, 19:53

@mattw: hi mattw, i am very sorry, because i red out the first SCC-1 ROM_A, and what can I see is only gabagge. I cannot recognize any structure, nor at the beginning something like "Roland... bla la". I soldered th lines very very carefuly, i will check the lines tomorrow again :-( Not like other …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-16, 19:30

@kitrinx in VSC code (dissembled) the function that reads the structures of size 0xD8 is named GetToneNames(). So, I do believe what is described by those structures in Roland-terminology is called "tone". Also, that function calls another one named AssignVariation(). I have no idea what those " …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-16, 13:54

Some instrument samples have vibrato/tremolo/LFO-like effects by default, but it's internal to the sample (i.e. it was present in the sample when the sample was recorded). This is not the case. Roland's samples were very, very short with lots of looping to save rom space. Most of them have no baked …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-15, 23:49

nukeykt wrote on 2020-12-15, 23:38: A bit offtopic question. But does MKII wave rom differ from MK1? I once tried to desolder rom chips but ended up breaking chip legs, so I don't want to touch it again. It is different, although the same size. Edit: Added roms

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-15, 23:01

Get yourself the SC55 manual and look in the back in the section about sysex control. There should be a section listing the patch part parameters (most settings are set per part, not per individual instrument). Wait, I looked it up, page 80 and onwards, the bit that starts with "MOD PITCH CONTROL" …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-15, 22:24

AFAIK, pitch has a simple "LFO" for vibrato, but the other two LFO's are more complex and can be assigned to various controllers and destinations through a modulation matrix controllable via sysex (which you can see in the sections about MIDI control and sysex in the back of the Roland manuals). …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-15, 21:57

@kitrinx thanks for the clue about "sc55" boolean. also, I am going to check if the MS code is applying any RIAA IIR filter or not. that I guess could answer if VSC sounds are pre-emphasized. Please let me know. Unfortunately these forums don't let me private message (yet) but maybe we could find a …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-15, 21:26

the VSC sounds are not only extremely low bit depth, but they also remove significant complexity from them like using multiple simultaneous partials and type 1 (forward then back) looping. I didn't explore enough to notice if they were heavily pre-emphasized like the ROM samples. It's entirely …

Re: About Roland Virtual Sound Canvas 3

Posted on 2020-12-15, 19:11

@kitrinx, @newrisingSun and all others :-) crazy guys are here:-) sf2 works :-) sometimes i think, your former employee was Roland :-) Thank you so much for all the work. Compiler under windows compiles even with noted compiler options with a lot of warnings, but at the end, sf2 is created. …

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