mutilple Volca FM

Discussion relating to the Korg Volca Series.

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ShoNuff
Full Member
Posts: 221
Joined: Mon Oct 27, 2014 4:30 pm

Post by ShoNuff »

Koekepan wrote:
I wouldn't throw a Rhodes on the floor either.
:shock: :D
check it out...>> will be testing this later on. latest beta/release candidate:
- - - - - - - -
Change log:

LFO:

* fixed S&H 256x scaling error

* fixed S&H update logic error

* fixed AMP modulation sign error (saw up <-> saw down etc, now same as dexed)

* fixed square wave sign error (now same as dexed)

* added filtering to remove nasty "digital pop" on discontinous LFOs (audible when amplitude modulating with saw, square and S&H)

Note killing on patch switching :

* added new Global Setting (number 11) that sets "Patch change: notes off (like original)" or "Patch change: keep notes on" - this will disable killing off sounding notes when patch switching. This removes the popping noise, but most importantly gives new creative opportunities since the FM can in reality play up to three different sounds at the same time. Sounding notes are not affected by the newly selected patch.

MIDI:

* MIDI note in velocity: Added a new Global Setting (number 9) that enables/disables velocity sensitivity on MIDI notes in. (Why would you disable velo in? Well, if you feed it notes from external sequencer, and want to work the velocity slider to achieve sonic climax, that's why)

* Added a new Global Setting (number 10) that switches between "Yamaha compatibility" and "Korg proprietary (like original)" single patch import/export behaviour. This makes importing patches from other devices work as it should.
See e.g. https://www.reddit.com/r/volcas/comm...s_are_too_low/ In "Yamaha" mode, it will turn all OPs "on" - this is a compromise that I think works better than the FM original. In reality, KORG implemented its own patch format where byte 155 (in the DX7 standard a checksum byte) is used to transfer OP on/off. This is objectively "better" - but again, not actually compatible. Importing patches from e.g. dexed gives weird OP on/off results. Also, if you have a MIDI out mod and dump a MIDI patch to a non-volca device/plug, it will complain that the checksum is wrong and reject it.

* added support for Program Change of patches and patterns. PC 0-31 are patches, 32-48 are the patterns

New MIDI CCs:

* CC 1 : (Mod wheel) assignable via CC 91, defaults to Pitch Mod Depth

* CC 85: Chorus on/off. value<64>=64 on.

* CC 86: Chorus stereo width, 64 is default

* CC 87: Chorus speed, 64 is default

* CC 88: Load patch, value 0-4: patch 1, 5-8: patch 2 etc up to 127

* CC 89: Load pattern, value 0-8: pattern 1, 9-16: pattern 2 etc up to 127

* CC 90: Tempo divisor, value 0-31: 1/1, 32-63: 1/2, 64-95: 1/4, 96-127: 1/8 (!)

* CC 91: Mod wheel mapping: decides what MIDI CC mod wheel should map to. E.g. 42 -> Mod wheel now controls Modulator Attack
OpAmp
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Joined: Fri Jun 07, 2013 10:26 pm
Location: Brussels, BE

Post by OpAmp »

Hi ShoNuff,

Interesting upgrade...
Will you share the new firmware somewhere?

Have fun.
microKORGXL, Kaossilator Pro, monotribe, SQ-1, volca fm, Kross 88 BK
Alesis SR18, Akai Miniak, Fender Strat, Line 6 Spider II 112, Zoom MS-50G
ShoNuff
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Posts: 221
Joined: Mon Oct 27, 2014 4:30 pm

Post by ShoNuff »

i have to leave that up to pajen, the author: he wants to make sure it all works properly before letting it into the wild. going to test it tomorrow for any strange behaviour, just in case. shouldn't be too long now.
roblabs
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Posts: 1396
Joined: Sun Sep 25, 2011 12:56 am
Location: NYC

Post by roblabs »

This is a firmware for what exactly?
ShoNuff
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Posts: 221
Joined: Mon Oct 27, 2014 4:30 pm

Post by ShoNuff »

roblabs wrote:This is a firmware for what exactly?
volcaFM.
did first tests of this one this morning. working well so far. still have some checks to do.
update: everything working. haven't yet checked transfer to 2nd FM in original mode but it should work.

great improvement. just having velocity in is nice.
adjustable Chorus gives a phatter more organic sound. not fully tested.
modwheel: default is pitchmod amount, or can be mapped to any of the CCs.
and it's properly compatible with Dexed now, which is a much better experience. find patch in Dexed, send to vFM, same thing on vFM an instant later - which it wasn't when you had to go into Edit mode and switch on all the OPs.
has a new superslow 1/8 sequencer time division .. accessible via midiCC
and you can change patch or pattern via program change or midi CC#s.
pajen
Posts: 5
Joined: Mon Jul 22, 2019 3:51 pm

Post by pajen »

ShoNuff wrote:i have to leave that up to pajen, the author: he wants to make sure it all works properly before letting it into the wild. going to test it tomorrow for any strange behaviour, just in case. shouldn't be too long now.
I registered here now. Send me a PM and I might be able to send a link to the beta volca FM FW to interested parties.
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