Search options (Page 16 of 16)

Thanks for the infos!
0x27 seems to be the so called CSM mode
look at this video http://www.tudou.com/programs/view/IsH_CP_vNnM/ it seems to showcase the use of CSM for formant synthesis...
look at the last channels with only  sine waves that seems to play together the form the vocals...
It is coming from this place http://www.geocities.jp/submarine600/ht … voice.html there is some CSM programming info for the OPN/OPNA on the PC-8801...there is a zip file http://www.geocities.jp/submarine600/fi … 090729.zip that I do not understand well (you probably would better) but there seems to be PCM datas involved to (voice.dat) also the file csm88.z88 have some registers setting that could help you.

there is probably a good reason for the lack of use (if any?) of this mode on megadrive music

EDIT:
Google translate is my friend
reg 0x27 on CSM MODE seems to work like that:

Similar to CH3 Special Mode (adjustable F-NUMBERS) work for CH3 only.
The only difference seems to be the AUTOMATIC KEY ON/OFF of the 4 OP's ...in fact it is a kind of mimic of a DAC that plays back a PCM   CSM play the sound at regular intervals rewriting the 4 TL's and F-Numbers of the operators as well.
The interrupt seems to process at intervals of Timer-A.

Regarding Nemesis test on the YM2612:
Special mode is always active when CSM mode is active. CSM mode is only active when the mode bits are set to 10, NOT when they are set to 11. so we have to test the corresponding midi CC values that are working for the GENMDM

In order for CSM mode to have any effect, Timer A must be loaded. In other words, bit 0 of reg 0x27 must be set to 1. None of the other timer-related flags, including the reset and enable bits, nor the state of Timer B, have any impact on CSM mode whatsoever, and the act of changing the state of these settings at any time have no impact on the operation of the CSM mode, as long as the channel 3 mode, and Timer A load flag remain unchanged.

The effects of CSM mode:
When CSM mode is correctly enabled, each time Timer A expires, the following two steps occur, in the specified order:
1. Key-on is sent to all operators in channel 3
2. Key-off is sent to all operators in channel 3

In other words, key on occurs, immediately followed by key-off, at the instant Timer A expires.
The Attack Rate must be set to 31 otherwise you got no sound, because of the instant key off. TL and RR are the two only parameters which control the envelope under CSM mode.

Regarding manual key on:
CSM mode only affects operators which are currently keyed off. If you were to manually key-on all operators in channel 3, then enable CSM mode, the CSM mode would have no effect until you sent a manual key-off event. If you never send a manual key-off, CSM mode will never take effect.

It seems to be a pain in the ass to program for speech synthesis but nice to try! and knowing formant frequencies is a +

I also have a couple of questions:
1- regarding the CH3 special mode F NUMBERS...could you provide me the lowest and the highest frequencies in HZ and(FNUMBER) that you can reach ? just to be sure I made it right in my FMDRIVE and for GENMDM compatibility  

2-regarding SSG EG... I see in the CC Chart101.txt that you have one CC enable function and one CC setting for the SSG shapes.
Isn't it normally available as a per operator basis ? so on one channel we should have 4 CC's for SSG on/off and 4 CC's for SSG shapes?
maybe you did not implement it yet... so i assume it's a global enable for all operators of the channel ?
anyway great job! thx again for the update
thx++

Hi Seb, Before I search for the answer myself let me ask you this question if you come around here :
How many CC could I send to the teensy at once? the obvious reason is to recall GENMDM patches on the fly with program change events on the same channel. The instruments patches will be stored in my FMDRIVE 2612 VST. (link for those who did not know: http://youtu.be/nxAKR9f437w ).
Happy Nu Year by the way!

For those who might be interested in the FMDRIVE2612 Emulation Part...Here is an audio comparison I have made with a real sega megadrive PAL model 1 Headphone out. The MD1 is on the Right channel, FMDRIVE2612 VST on the Left. Scope visualization for the record...

An interesting feature, as certain have suggested, would be the compatibility of presets with the GenMDM hardware GUI side...
most of the parameters should work...more on that as soon as will receive the unit and make some tests...:-)

For the geeky side, here is the YM2612 parameters used on the 3 video examples tests.

INST 01
ALGO 0
OP4 / C2: TL 0 AR 31 D1R 0 SL 0 D2R 0 RR 4 MUL 1
OP2/ M2: TL 0 AR 31 D1R 0 SL 0 D2R 0 RR 4 MUL 1
OP3 & 1 =  OFF

INST 02
ALGO 0
OP4/ C2: TL 0 AR 31 D1R 10 SL 6 D2R 23 RR 15 MUL 1
OP2/ M2: TL 0 AR 16 D1R 18 SL 1 D2R 15 RR 15 MUL 0
OP3 & 1 = OFF

INST 03
ALGO 5
OP4 & 3 = OFF
OP2/M2: TL 0 AR 16 D1R 0 SL 0 D2R 0 RR 4 MUL 1
OP1/M1: TL 12 AR 31 D1R 0 SL 0 D2R 0 RR 4 MUL 1  FB 5

Thanks ;-) Actually FMDrive 2612 is a VST SYNTH I have done prior to know the existence of GenMDM.
I am a MD lover and I needed something to play with with full live control in a DAW. I needed Anything but a tracker. I first used VOPM , YM2151 based, so it was close enough but  lacks of easy automation and GUI.

So I decided to make mine for personal use. Started from scratch with the help of some devs FMDrive2612 is YM2612 based with full MIDI automation and custom made controls (some parameters from the 2151 where included, (DT2 coarse detune,Multiple LFO waveforms...) and some nice tweaking (controls over the DAC, Noise floor, Megadrive 1 Headphone output...HD mode..) and nice controls on the EG (global envelope generator rate ratio, original parametric or custom graphic envelopes up to 8 stages...control over the SSG shapes...).

It is not a straight binary emulation so it is not based on any existing core. It has been Almost fine tuned by ear with a real MD1 hardware.
C code based and later assembled inside the synthedit framework so it is win VST 32Bit Only ^^

It is close enough to let you use dumped instruments parameters or create and experiment your own.
It can output classic MD sound or pure clean to very dirty sounds if you mess with the DAC & BITS control...
There is also the DAC part that let you import 4 wav samples and the CH3 Special mode.

Later I decided that the Synth migh be released around JAN or FEB 2013 and will probably cost 12$ :-)

With a GenMDM freshly ordered I decided to turn the FMDrive2612 GUI into a VST MIDI controller, besides it will need some customization to feat the GenMDM latest firmware. When I will receive the GenMDM, probably in 3 or 4 months from now, I will do the final tests and offer the controller version for free.

Great!
Seb, Is there a way for you to mail me the current Full list of CC ?, so I could start mapping my custom GUI to control the GENMDM, just a raw cc text list will do the job, by the way here is a first look at the GUI ;p

Great news ! for the SSG EG ;p  you can definitively count me in for the round 2

What about SSG EG and the CH3 Special mode implementation ? is it fully supported now ? and does the unit comes with a full CC List for users who do not use Live? (I saw the basic CC list PDF) and by the way, how do you set the frequencies or Fnumber internally is there a kind of scaling limitation?
ThanKs ;p