Sonica Synthesizer with Case made by Frank Eventoff SN 393

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"1979 Sonica synthesizer designed by Frank Eventoff, with oscillator design credited to Serge Tcherepnin. A limited run of only 650 of these beautiful, solid Red Alder instruments were ever made. This is number 393 in the series."

CLICK FOR MORE »

Sonica Synthesizer SN 513

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Rare Sonica Synthesizer in immaculate condition with case and paperwork.

Number 513 of 650 ever made. Beautifully made.

So weird and rare there's not a great deal about this piece out there."

Video in the listing posted here. See the Sonica label below for more.

CLICK FOR MORE »

NMC Learning at Home: The Sonica Synthesizer

Published on May 11, 2020 National Music Centre

"Evan the Educator highlights the sonica, a quirky electronic instrument in the National Music Centre's collection. Built in 1979 by Frank Eventoff, it sounds like a cross between a theremin, sitar, and violin."

SONICA SYNTHESIZER BY FRANK EVENTOFF #441 OF 650 w/ Original Case

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

I don't think I ever realized how small these were until I saw the 9V battery slot below. It appears to be the size of a ukulele if that.

"The Sonica was a synthesizer designed by Frank Eventoff in 1979 with an oscillator desined by Serge Tcherepnin. A limited run of only 650 were ever made, and this is number 441."

See the Sonica label below for more.

CLICK FOR MORE »

Sonica by Frank Evantoff - #388 of 650 - 1979 Walnut Finish, Brass Face & Hardware

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"I inherited this Extremely Rare (#388 of Only 650 Ever Made) Instrument and it is still in incredible condition despite being roughly 40 years old. The Wood Body is in amazing shape, the brass Face, Back, and Plate on the backside of the Scroll (reads #388) are still shiny and lustrous. It still plays incredibly well and comes with the Original Black Case and Authenticated Paperwork / Warranty Documents. Every Feature that it was designed to include still works wonderfully and despite a small area of wear on the Blue Foam Speaker material, you'd think it was kept in a time capsule since released in '79. Models that have sold over the last few years, that have higher Model #'s and are in not as good of condition, have sold for between $1,200 and nearly $4,000. Everything operates well..."

CLICK FOR MORE »

Rare Frank Eventoff "The Sonica" Synthesizer SN 519

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"The Sonica was a synthesizer designed by Frank Eventoff in 1979. A limited run of 650 were made, this is number 518. This one is in excellent condition with only minor wear on the grill cloth in front of the speaker. Includes original case, unsigned warranty card, and owner's manual. These are ultra rare and incredibly hard to find, get this while you can because you don't know when another one will come along!"

CLICK FOR MORE »

Sonica #269 of 650 by Frank Eventoff of Serge 1979

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Much has been written online about this unique, rare, beautiful piece of electronic music history.

Sonica #257 sold at Bonhams auction house in 2011 for £2,671. Thats a lot, but like a Minimoog, this instrument is WORTH that much money. It's so beautiful.

I'm not going to copy and paste other people's words here. OK, just two links:

Some Sonica Info (matrixsynth.blogspot.com)

History of the Sonica (alsrecordsandtapes.com)"

And of course, check out the Sonica label at the bottom of this post for more.

CLICK FOR MORE »

Frank Eventoff Sonica Limited Edition Synthesizer #77

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"You are bidding on an extremely rare Sonica synthesizer built by Frank Eventoff in 1979. Only 650 of these were ever made. Very few are now known to exist. The body is carved of mahogany with brass plates and has a plaque with the number (#77). It comes with the original custom-sized case. Speaker cloth is torn but the speaker works fine and is all original. Picture shows fading, scratches and a crack on the bottom. Other than cosmetic, everything works fine.

It also features three buttons. Analog “Slider” which is a tremolo type effect, Analog “Tone” which is actually a tonal boost, and “Half-Step” which raises the note an octave. It features a built-in speaker, with an 1/8 inch output to connect to an amplifier or recording device. It runs on one 9-volt battery which is installed by accessing a plate on the backside of the device."

See the Sonica label at the bottom of this post for previous posts, and to get an idea of how often they have come up in the past.

CLICK FOR MORE »

FRANK EVENTOFF SONICA SN 248

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Featured for sale is a fine example of the vintage handmade FRANK EVENTOFF SONICA portable Electric Serge Synthesizer.

It features 15 Keys for Notes, an additional 1/2 Step Touch Button ("tone" and "slider" buttons are not working properly), Master Volume and On/Off Knob, 1/8" Output (for external amplifier connection), Key Adjuster knob, and Kill Switch.

All knobs and switches are in Excellent Operating Condition with the exception of the "slider" and "tone" buttons occasionally cutting out. It is in Good Vintage Cosmetic Condition (see photos), with normal signs of previous careful use on its body.


This Unique late 1970's instrument is a rare find. It is numbered #248 of only 600 that were made in the USA. Made of Solid Wood, with Brass Trim and Engraved Brass Plate (see photos). It comes protected in its included fiber-board case."

CLICK FOR MORE »

Sonica Synthesizer by Frank Eventoff #585

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Sonica Serge Synth Instrument, Frank Evantoff Number 585.

Own a part of synthesizer history. One of very few surviving, fully working Sonica Instruments. One sold at auction for $3,416.00

This example is in excellent condition, no damage other than one small ding (size of a BB) in the base of body. No corrosion on battery connections, original case, unmarked original instructions (even has unused stamp for warranty return). This instrument was bought new and put in a closet and recently found.

You are bidding on an extremely rare FULLY WORKING electronic synthesizer instrument by Frank Evantoff, called the Sonica. Number 585 of only 650 produced. Shaped like small lute with a guitar like neck which fits perfectly into the hand. By touching the frets on the neck the instrument produces notes best often described as between a theremin, sitar and a violin.

Frank invented the force sensing-resistor FSR. "After Mattel had used the concept for the "Magical Music Thing," Frank Evantoff developed a more precise keyboard and incorporated it into this new instrument, which he called The Sonica.

In 1979, the first Sonicas were produced, a collaboration with Larry Heller. There were 650 eventually built, but very few are seen nowadays. Serge Tcherepnin of Serge synthesizers (analog modular) did the oscillator design, and the oscillator inside the Sonica is indeed a Serge oscillator. The bodies have an interesting gourd/phallic shape, and were carved red alder wood with hand rubbed lacquer and covered with brass plates. This instrument is hand made even the circuit boards are hand printed. The neck is incredibly comfortable, and easily fits into the hand, facilitating the sliding action used for playing the Sonica.

The sound of the Sonica can best be described as somewhere between a theremin, sitar and violin. When run through a simple delay, an amazing array of soundscapes are derived. The front panel features a Key/Pitch Knob, and an On/Off Volume Knob. It boasts 15 keys with additional half step notes.

It also features three buttons. Analog “Slider” which is a tremolo type effect, Analog “Tone” which is actually a tonal boost, and “Half-Step” which raises the note an octave. It features a built-in speaker, with an 1/8 inch output to connect to an amplifier or recording device. It runs on one 9-volt battery which is installed by accessing a plate on the backside of the device.

The Sonica really shines when sent through a tube amplifier, producing a crystalline sound unlike anything I’ve heard before.

Please check out youtube of looping, etc. and history of The Sonica by Frank Eventoff.

Comes with original unmarked/no tears instructions (even has unused stamp for warranty return)."

CLICK FOR MORE »

SONICA by FRANK EVENTOFF SN 230 & 410

Note: Auction links are affiliate links for which the site may be compensated.

SN 410 via this auction

SN 230 via this auction

"Travel back in time with this vintage Sonica. Yes, it is an unusual instrument. Around 1979-1980, only 650 were built. It's really a synthesizer that looks like a mini-guitar/sitar. The tone is something like a theremin. To hear the actual tone, there are various Youtube videos of folks playing one. This one is numbered 410. It's only about 20" long. It has its own little speaker and runs on a single nine volt battery. It has two octaves. All the notes on the headstock are major, but there is a half-step button on the body. The key is adjusted by a key knob. Yes, it is an odd duck! It is quite well made with a wood body (carved from Red Alder) and brass front, back and rear head stock plates (coated with baked enamel). The "fretboard" is also side with brass. This one is in good condition except for tears on the interior speaker grill cloth. The brass plating is tarnished, but I didn't dare scrub it with Brasso. It comes with the original (cute as the dickens) black chip board case with two piece of case candy. The mini six-page instructional booklet and warranty and the Sound Instruments warranty card (with the original 15 cent USPS "1980 Winter Olympics" speed skating stamp). It has an odd "in-tune" function: "Play the middle diamond... on the keyboard and turn the Key knob until the note sounds in tune with the music you're listening to." It also has an 1/8" output jack for a regular amplifier. Ol' Eric Clapton had one of these that was sold at his 2011 Bonhams auction for over $3,400. (Check it out online.) The inventor of the Sonica, Frank Eventoff, previously invented the popular Magical Musical Thing, and now runs Sensitronics, which is still on the cutting edge of experimental electronic musical instrument technology."

CLICK FOR MORE »

SONICA BY FRANK EVENTOFF #311

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"This is the unusual and strange instrument, the SONICA. Invented by Frank Eventoff, supposedly only 650 were made. (I interviewed him oncMcDonald's cash registers, etc. all over the world. The instrument is made from a circuit built by SERGE Modular synthesizers (see photo of circuit board) and has a warm, mellow tone. You slide your finger along the diatonic-tuned soundboard. More importantly, there are 3 control pads: Slider wobbles the pitch a little (vibrato), Tone adjusts brightness, Half-Step gives you half-step notes (as diatonic scale misses some in-between, you can get them here). The tone control doesn't do much, maybe it's waveform adjust or something, but the sound is already dark and low, like a flute, so there's not many highs to affect. It's easy and fun to play, comes with original case.

'You are bidding on an extremely rare Sonica synthesizer built by Frank Eventoff in 1979. Only 650 of these were ever made. Very few are now known to exist. The body is carved of mahogany, and has a plaque with the number 311 comes with the original custom-sized case.'"

CLICK FOR MORE »

The Sonica Frank Eventoff Musical Electronic Synthesizer Instrument SN 250

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

CLICK FOR MORE »

THE SONICA #50 Frank Eventoff Musical Electronic Synthesizer Instrument

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

See the Sonica channel below for previous posts.

CLICK FOR MORE »

Sonica Synthesizer Instrument by Eventoff SN 609

Note: Auction links are affiliate links for which the site may be compensated.

via this auction - learn how to sell on eBay here

"There were only 650 of these made for a very short time beginning in 1979. This one is #609. Controls include Off/On/Volume and Key knobs and three touch pads titled Slider, Tone andHalf Step. It is powered by a 9 volt battery and has its own built in speaker. It also has a jack. The body is beautifully hand-carved wood and shows very little wear for its age. The face and rear plates appear to be brass. The soundhole area of the face plate is a bit bent in but it should be very easy to straighten it. The foam under the plate is showing a minor amount of cracking due to age. The Key knob has a thin crack at the tightening screw but it is solid and functional. There are two minor, superficial scratches on the fingerboard. Overall, this is a beautiful instrument. It works. It comes with its original case. In the case, you will also find the original warranty card, complete with stamp, and the small Sonica brochure showing the major scale, info about the Sonica and music for a song to play. Sonicas are very rare and are seldom seen on the market. Don’t miss your chance to own this wonderful and beautiful instrument!"

CLICK FOR MORE »

Frank Eventoff Sonica SN 227 Video

Note: Auction links are affiliate links for which the site may be compensated. Sonica- late '70's primitive synth

Published on Apr 11, 2013 Derek See

"Made in L.A in 1979; kinda theremin, kinda magical musical thing..."

I believe this is the first video of the Sonica posted on the site.  It's much smaller than I expected!  I've posted a ton of these and I don't think I ever realized just how small it is.


via this auction

"Super cool primitive synth, made in Los Angeles by Frank Eventoff in 1979. This one is #227 out of (allegedly) 650. Very clean with all original paperwork in the custom chipboard case. The center tone knob is not functioning, but all else works great. See it in action here:" [embed above]

CLICK FOR MORE »

Frank Eventoff Sonica Synthesiser - #092 - Serge

Note: Auction links are affiliate links for which the site may be compensated.
via this auction

"I am the original owner of this very rare Frank Eventoff Sonica. I bought it straight from him back in either '78 or '79 while I was working at Hollywood Sound, and he happened to drop by the studio. I have played it some, as you can see some wear at the bottom of the instrument. Everything is in excellent condition, and plays as well as it did then. It is hand carved mahogany, with brass plates.

Comes with original case and original instructions.

This is a LOW number of only 650 made...it is #092."

CLICK FOR MORE »

Sonica Serge Synth Instrument, Frank Evantoff Number 490.

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Sonica Serge Synth Instrument, Frank Evantoff Number 490.

One of very few surviving, and of even fewer fully working Sonica Instruments.

This example is in fine condition, no damage other than one small cosmetic scuff to base of body (see last photo). No corrosion on battery connections, original case, unmarked original instructions and original instrument to amplifier cable.


You are bidding on an extremely rare FULLY WORKING electronic synthesizer instrument by Frank Evantoff, called the Sonica. Number 490 of only 650 produced. Shaped like small lute with a guitar like neck which fits perfectly into the hand. By touching the frets on the neck the instrument produces notes best often described as between a sitar and a violin."

CLICK FOR MORE »

SONICA SN 595 of 650

Note: Auction links are affiliate links for which the site may be compensated. via this auction
"Only 650 of these strange instruments were made since their they began manufacturing them in 1979. Shaped like small lute with a guitar like neck and speaker inside that was the voice. They player could sound notes by touching the frets on the neck that produce at between sitar and violin. Comes with case and original user manual/warranty certificate.

After Mattel had used the concept for the "Magical Music Thing," Frank Evantoff developed a more precise keyboard and incorporated it into this new instrument, which he called The Sonica. In 1979, the first Sonicas were produced, a collaboration with Larry Heller. There were 650 eventually built, but very few are seen nowadays. Serge Tcherepnin of Serge synthesizers (analog modular) did the oscillator design, and the oscillator inside the Sonica is indeed a Serge oscillator! ( LOOK FOR SERGE TCHEREPNIN'S NAME ON THE HAND PRINTED CIRCUIT BOARD!!! ) The bodies have an interesting gourd/phallic shape, and were carved wood. The neck is incredibly comfortable, and easily fits into the hand, facilitating the sliding action used for playing the Sonica.

The sound of the Sonica can best be described as somewhere between a sitar and violin. When run through a simple delay, an amazing array of soundscapes are derived. The front panel features a Key/Pitch Knob, and an On/Off Volume Knob. It boasts 15 keys with additional half step notes. It also features three buttons. Analog “Slider” which is a tremolo type effect, Analog “Tone” which is actually a tonal boost, and “Half-Step” which raises the note an octave. It features a built-in speaker, with an 1/8 inch output to connect to an amplifier or recording device. It runs on one 9-volt battery which is installed by accessing a plate on the backside of the device. The Sonica really shines when sent through a tube amplifier, producing a crystalline sound unlike anything I’ve heard before."

Sonica Frank Evantoff # 477 of 650

via this auction
"extremely rare electronic synthesizer instrument by Frank Evantoff called the Sonica. Look at the marks from the carving tools the craftsman used to make the instrument. They neatly hold the battery! Only 650 of these strange instruments were made since their they began manufacturing them in 1979. Shaped like small lute with a guitar like neck and speaker inside that was the voice for the Serge designed oscillator inside ( Look for Serge's name on the hand printed circuit board! ). They player could sound notes by touching the frets on the neck that produce at between sitar and violin. It has very minor dings (see photos). Comes with case and original user manual/warranty certificate.

After Mattel had used the concept for the "Magical Music Thing," Frank Evantoff developed a more precise keyboard and incorporated it into this new instrument, which he called The Sonica. In 1979, the first Sonicas were produced, a collaboration with Larry Heller. There were 650 eventually built, but very few are seen nowadays. Serge Tcherepnin of Serge synthesizers (analog modular) did the oscillator design, and the oscillator inside the Sonica is indeed a Serge oscillator! The bodies have an interesting gourd/phallic shape, and were carved wood. The neck is incredibly comfortable, and easily fits into the hand, facilitating the sliding action used for playing the Sonica.

The sound of the Sonica can best be described as somewhere between a sitar and violin. When run through a simple delay, an amazing array of soundscapes are derived. The front panel features a Key/Pitch Knob, and an On/Off Volume Knob. It boasts 15 keys with additional half step notes. It also features three buttons. Analog “Slider,” which is a tremolo type effect, Analog “Tone,” which is actually a tonal boost, and “Half-Step,” which raises the note an octave. It features a built-in speaker, with an 1/8 inch output to connect to an amplifier or recording device. It runs on one 9-volt battery which is installed by accessing a plate on the backside of the device. The Sonica really shines when sent through a tube amplifier, producing a crystalline sound unlike anything I’ve heard before."

CLICK FOR MORE »