"The Elka Wilgamat was an accompaniment unit intended as an add-on to some of Elka's organ line and also as a standalone unit with dedicated 2 octave keyboard. It consists of a rhythm unit, a bass section and a chord section. All sounds are of course fully analog. It is very similar in features and sound to theGodwin Drummaker, Wersi Wersimatic WM24, Elgam Carousel or Böhm Böhmat."
"The Welson Ritmo was a accompaniment unit intended as an add-on to some of Welson's organ line. It consists of a rhythm unit, a bass section, a chord section and an arpeggiato section. All sounds are of course fully analog. It is very similar in features and sound to the Elka Wilgamat, Böhm Böhmat and Wersi Wersimatic CX1. They are actually built around the same chipset family (SGS M2xx), but the Ritmo cannot be programmed.
It was never intended as a standalone unit so I built a custom keyboard to make it so.
Unit is very easy and straightforward to use with some nice features: for instance you can play it in "free chord" or 'one finger chord'. In the first mode you need to make a 3 notes chord to trigger the arp sound. With one or 2 notes you only trigger the bass and chord sounds, this make for some nice performance variations. The bass section can be set to 'walking bass', and in this mode you also need 3 notes to trigger the melody.
In 'one finger chord' you play a major chord with one key. There is a pedal input on the back to make the chords minors. I also added a switch on the keyboard to alternate between major and minor chords when playing in the "one finger chord" mode.
Other nice features are "keystart" (obvious functionnality) and 'memory' which holds the played notes (and rhythm).
And like almost all the preset rhythm units you can combine different rhythms together."
"The Boehm (Dr. Böhm) Böhmat Solist-S Compact is an analog rhythm box / accompaniment from 1974 made in (western) Germany. Great analog sound! Completely analog sound generation, not programmable. But the rhythms and different arpeggios are combinable!
I played it partly with delay (right channel only) and reverb effects (Korg SDD-3000 and Lexicon MPX-500)."
This appears to be the first 1974 model featured on the site. You can find models from 1972 and 1973 in previous posts here.
via the seller: "This rhythm keyboard controller is in good/near-mint cosmetic conditions. I don't have the central unit, so I can't verify the functionality. It needs the central unit to be powered and I don't know if it contains a sound generator."
You can find a demo of the full Wersimatic system previously posted here and some pics of the back and inside of one posted here. Based on the mono and stereo outs I'm guessing this should produce audio on its own? Additional information about the WM24B can be found in German here, Googlish here. According to that site, "The many pushbuttons are used to adjust the many bass, accompaniment, and arpeggio variations. As with the Böhmat S, the 2 octave keyboard completes the complete accompaniment machine. But you do not have to, sounds rather modest, but of course this is a matter of taste."
Googlish (original German below):
"This Böhmat the first generation can be heard on the following LPs:" Golden Age for music lovers, "" Böhmat Express No.1 "and" Böhmat Express 2 ".
On the album "Panorama Sound" only the drums can be heard. All LPs were played by Ady penny.
