PortaFM vs real OPLL in real time + Prototype chipsynth FC hardware.

  Рет қаралды 8,368

plgDavid

plgDavid

Күн бұрын

chipsynth PortaFM is a new virtual instrument emulating Yamaha FM PortaSound keyboards of the mid 80's. This video explains how I test its YM2413 (OPLL) emulation code against hardware live though analog captures. (The OPLL has an internal Time-division multiplexed 9-bit DAC)
0:00:00 Yamaha's OPLL FM chip range
0:01:29 Primer: homebrew Famicom-style hardware vs software emulation
0:02:55 Comparison: OPLL vs OPL2 chip
0:04:48 Why emulate aliasing?
0:05:10 PortaFM's Drum mode
0:05:54 How to judge emulation quality?
0:08:02 Tremolo steps
Main product page:
plogue.com/products/chipsynth...
You can also read the manual here:
s3.amazonaws.com/chipsynth/Po...
Music used:
toycompany.bandcamp.com/track...
Notes:
1)My hardware OPLL-based Famicom cartridge has an active low pass filter to keep its op-amp from going crazy, so that explains why the top end is slightly duller on hardware. This is not a flaw of the emulator. The emulator does not filter anything to match any specific OPLL-using circuit.
2)Lagrange Point (the last cartridge shown) is a 1991 Japanese exclusive Famicom game which uses the VRC7 mapper for sound purposes. This special chip, made by Yamaha (but Konami branded), has a slightly modified OPLL core inside.
3)My "chipsynth FC" hardware synth is not yet ready to show/explain fully yet, it will be around time its plugin counterpart is shipping.
4)The "tremolo steps" test: The host emu and the external chip are driven by separate master clocks and have not be reset at the same time. So their LFOs phases - which derive from that master clock are not obviously not hard-synched. So if you actually look closely, the red and green lines will eventually do the same patterns, just not at the same time.
Great PortaFM walkthough video from @cuckoomusic
• Chipsynth PortaFM by P...

Пікірлер: 48
@nichttuntun3364
@nichttuntun3364 6 жыл бұрын
Hi. Really astonishing how much detail flew into your emulation with all the sonical movements grittyness and awkward behaviour of the sounds. I appreciate that very much because I am always looking for that extra unique and not unified clean sound like they all have. Your philosophy seems to be emulating without compromises. Well done! Joy to you.
@truecuckoo
@truecuckoo 6 жыл бұрын
Loooovely! Such deep care for this stuff, mate!
@JimLeonard
@JimLeonard 6 жыл бұрын
Bless you for testing against real hardware!
@bodoelsel
@bodoelsel 3 жыл бұрын
Great video. Just bought Porta fm yesterday and having a good time now. Amazing plug-in.
@Sakanakao
@Sakanakao 5 жыл бұрын
Those matching spectrums are pretty sexy. :O
@plgDavid
@plgDavid 5 жыл бұрын
Thanks! Means a lot coming from you!
@getter7seven
@getter7seven 6 жыл бұрын
Fine work and finer still to come.
@SMAAAASHTV
@SMAAAASHTV 2 жыл бұрын
At 0:09 that was my childhood right there. I had that exact PSS-140 when I was younger.
@justingoers
@justingoers 5 жыл бұрын
So good. Thank you!
@lutello3012
@lutello3012 5 жыл бұрын
00:8 Oh god, haven't heard that for almost 30 years!
@nicolesproducerpack
@nicolesproducerpack 5 жыл бұрын
Men's brains amaze me with these kind of details haha. I am trying to understand some of the terminology and it is going over my head 😂 I love the FM sound!
@plgDavid
@plgDavid 5 жыл бұрын
Music Resources, Gaming, Nicole Marie T Not sure its gendered more than my autism at work ha!
@EgoShredder
@EgoShredder 2 жыл бұрын
@@plgDavid Around 2010 I once met and briefly talked to a woman from a team, that worked on the original ARM chip. She definitely knew her sh*t! I forget her name though as it was a very quick chat at a supermarket checkout.
@Felecc
@Felecc 6 жыл бұрын
This is soooooo awsome, like wow :D Do you make VSTs from those chip dumps?
@plgDavid
@plgDavid 6 жыл бұрын
Kacper Jacuński most of our VSTs are based from my hardware rigs and the research team I put toghether see plogue.com Thanks!
@Felecc
@Felecc 6 жыл бұрын
No, thank you :D
@Azelf89
@Azelf89 5 жыл бұрын
Man, this is just awesome! One question: Would it be possible to add in support for the YM3812 (OPL-2)? I know that the main focus of PortaFM is the YM2413 (OPLL), however because PortaFM is supposed to be based off of the Yamaha FM Portasound Keyboards, I think having support for the OPL-2 would make the whole thing feel more complete, since the OPL-2 was also used in Yamaha’s Portasound line of Keyboards.
@plgDavid
@plgDavid 5 жыл бұрын
As well as the OPK and OPK2, maybe in the future. Cheers
@Azelf89
@Azelf89 4 жыл бұрын
@@plgDavid Slightly late, but thanks for the response! By the way, I have a question: Would you happen to know the parameters to recreate the sounds found on the Yamaha PSS-270? I'm asking because I would love to play around with the sounds found on that keyboard, *especially* the Baby Doll sound.
@plgDavid
@plgDavid 4 жыл бұрын
@@Azelf89 $38 $24 $91 $03 $90 $83 $11 $F3
@0e0
@0e0 6 жыл бұрын
incredible
@pumodi
@pumodi 6 жыл бұрын
Very interesting to see behind the process. Are the cartridges still something you're thinking of putting out?
@plgDavid
@plgDavid 6 жыл бұрын
Jeffrey Brice Music Yes eventually. It will be a small production. While I did buy 300 of those chips Who knows how much more there are that will get recycled and resold in china.
@pumodi
@pumodi 6 жыл бұрын
plgDavid that's totally fair. I'm sure it's quite a process. Out of all the music tech projects out there yours are the ones I follow most. If and when you do release carts I'm hoping to have one of each :P
@danzarz
@danzarz Жыл бұрын
Great synth! I had PSS-390 in 1990s... I have purchased the PortaFM lately. I love it :) What does the DMXOPLL mean?
@plgDavid
@plgDavid Жыл бұрын
Its a suite of open source patches out there
@danzarz
@danzarz Жыл бұрын
@@plgDavid Thank you. I have another idea: it would be interested to have a library of rhythms (drum loops) from styles in PSS 380/270/140 etc in PortaFM...
@joshi_6887
@joshi_6887 4 жыл бұрын
How did you command the sound chips from famicom carts on famicom directly from the synthesizer ?
@plgDavid
@plgDavid 4 жыл бұрын
Custom C++ code on microcontroller inside the shell
@plgDavid
@plgDavid 4 жыл бұрын
Et le VST lui parle à travers MIDI
@joshi_6887
@joshi_6887 4 жыл бұрын
plgDavid what
@plgDavid
@plgDavid 4 жыл бұрын
@@joshi_6887 Quoi what? Il faut préciser la question.
@jackcimino8822
@jackcimino8822 6 жыл бұрын
This is cool, but why is there no OPL2 or OPL3 mode for extra waveforms?
@plgDavid
@plgDavid 6 жыл бұрын
Jack Cimino Because its an emulation of the OPLL only. Would be easy to add but wouldn’t be the “cheapest FM synth” anymore
@dysamoria
@dysamoria Жыл бұрын
"Did you have one of these?" [Opens closet, pulls out exact keyboard as the first example in the video] Yes, I apparently do. Given to me from its previous owner, who was probably not its first owner. Please tell me there's something useful I can do with it, ha ha ha
@plgDavid
@plgDavid Жыл бұрын
Look silly on stage
@mirabilis
@mirabilis 6 жыл бұрын
Have the instruments from the VRC7 been dumped?
@plgDavid
@plgDavid 6 жыл бұрын
We are not conducting decapsulation, but my sources tell me some deeper intrusive methods would be needed to capture the VRC7 instruments as they are on the DIE. We used a different method for all 4 known variants which are 100% "ear accurate", but surely a few bit off with the actual ROM. I dare you find a difference though :)
@mirabilis
@mirabilis 6 жыл бұрын
plgDavid It would be cool to have the exact settings, but as long as they sound the same, I really don't care that much.
@plgDavid
@plgDavid 5 жыл бұрын
@B3ro1080 That they were.
@plgDavid
@plgDavid 5 жыл бұрын
@B3ro1080 Yeah I actually reproduced the debug mode on hardware and had 9 channels on VRC7. Pretty amazing discovery
@plgDavid
@plgDavid 5 жыл бұрын
@B3ro1080 Yamaha made the chip and stamped a Konami logo on it... so doubtful!
@hacktrixapii
@hacktrixapii Жыл бұрын
I have a PSS-170 across the room from me for no reason. It sounds just as quanky as it did when I got it.
@heiyi5843
@heiyi5843 4 жыл бұрын
请问大大,软件她支持中文吗?
@ne7andyL
@ne7andyL 6 жыл бұрын
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