MATRIXSYNTH: Wersivoice FM76 & Wersi WV30 Wersivoice Rotor/String Effect Cards


Monday, June 19, 2023

Wersivoice FM76 & Wersi WV30 Wersivoice Rotor/String Effect Cards


Wersivoice FM76 video upload by hi there its me

"Vintage Chorus/Vibrato from the late 70s
- demonstrated with Ableton's Operator (Sine/Squarewave)
- no effects added
- beautiful to warm up your digital synths
- also works great with guitars, vocals..."

Note the video above is not for the listing below and it actually uses a different card. See the update from Ohm Studio below. There were different versions of the PCBs used by Wersi. Read on for details.



via this auction

"These WV30 rotor/string cards are used and tested from a Wersi Arcus and are suitable for all CD range organs. Not suitable for any DX range organs."

Update: I asked Ohm Studio if this was the same model card used in his custom design. He replied: "It’s not the same pcb I use or used in the Wersivoice FM76 above (the only standalone manufactured model they made). It’s from a more recent design and uses different bucket brigade devices, Panasonic MN3004 instead of the Philips TDA1022 used in the Wersivoice, Bohm and most of the Italian string synths and organs from the late 70s on (the Farfisa effect I built was also designed around those).

Earlier ensemble fx used TCA350 BBDs like the Eminent Solina, Logan string melody, Crumar Stringman etc.

American and Japanese designs tended to use Panasonic (Roland used the MN300x a lot. Like in Juno choruses too).

I never really notice a real difference in sound between those BBDs IF the circuit is more or less similar and based on the Solinas, ie using 3x BBDs modulated by 2 lfos, one at 6hz and one at 0,6hz.

Roland ensemble fx do sound very different than the rest, but IMO it’s not because of the uses of Panasonic BBDs but because of the circuit design that is not based on the classic eminent design.

I do think however that the Bohm Phasing rotor and the Wersivoice are the lushest you can get (except, most probably for Jurgen Haible Triple Chorus, which unfortunately I never had a chance to hear. From what I've read the Bohm was a huge influence in his design).

So to make a long story short: no it’s not the same but I’m quite sure it would sound nice because it looks like it’s the classic design."

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