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Vako Synthesizers Incorporated, founded by electronic instrument pioneer and former Moog technician and salesperson David Van Koevering, started to build improved versions of the Optigan under the name Orchestron in 1975. Intended for professional use as an alternative to the Mellotron (hence the name Orchestron), it featured improved recorded sounds over the Optigan. The Optigan was an organ that played its sounds from light scanned graphic waveforms encoded on film discs. The sounds with the highest fidelity were on the outer rings of these discs. These outer rings were used for the Orchestron sounds to improve the sound. Although the Model A Orchestron is identical to the Optigan, the models B, C, and D follow the designs of the Chilton Talentmaker. The Talentmaker was taken out of the market after Optigan's manufacturer – Optigan corporation, a subsidiary of toy company Mattel – threatened to sue Chilton because of patent infringements.
Some Orchestron models included sequencers and synthesizers. These were the larger Model X and Phase 4 units, though very few of these made it past the prototype stage. While the same fidelity limitations of the Optigan applied to the Orchestron, these instruments were built to be more reliable and were used successfully in commercial recordings.
The band Kraftwerk made heavy use of the Orchestron on their albums Radio-Activity (1975), Trans Europe Express (1977) and The Man-Machine (1978). In 1974, The band Yes used the Orchestron on their Relayer (1974) album. The Orchestron wasn't a commercial success, though. An estimated total of 70-100 units were built before production ceased after a couple of years. Its rarity and popularity amongst lo-fi enthusiasts makes the Orchestron highly sought after.
The Orchestron uses basically the same principle as the Optigan: each note of the keyboard is recorded in an infinite track on a pre-recorded, interchangeable optical disc. A beam of light is sent through the disc, variations in the light intensity are detected and amplified.
Originally, there were only eight sounds available for the Orchestron:
New discs have been made available by Pea Hicks and his team from Optigan.com, as well as remastered versions of the original discs. These new sounds are:
- Solo Trombone
- Solo Trumpet
- Solo Female Voice
- Tremolo Electric Guitar
- String Ensemble
The violin sound is the most common Orchestron sound, being used by several bands as a type of Mellotron substitute. The choir sound follows in second place and was taken from the Optigan's "Vox Humana" disk, as was the "Cello" sound. The Hammond B3 sound is also taken from an Optigan disk, "Big Organ and Drums".
- Model A – (1974) an updated version of the Optigan (used by Kraftwerk)
- Model B – (1974) an updated version of the Talentmaker (used by Patrick Moraz / Yes)
- Model C – (1975) a Model B in a new (black) housing
- Double C – (1975) a double Model C
- Model D – (1975) a Model C in a roadcase (from this model on, Viking Keyboard Systems instead of "Vako" was the name of David Van Koevering's company)
- Double D – (1975) a double model C in a roadcase
- Model X – (1975) a specially built model for Patrick Moraz (prototype)
- Model Phase 4 – (1975) a prototype model that blends the disks sounds with built-in synthesizers
Orchestrons used in professional recordings
- Kraftwerk's Florian Schneider bought an Orchestron Model A during their Autobahn tour in the USA in 1975. On the unofficial live album Concert Classics, recorded during their 1975 tour, the instrument can be heard. Ralf Hütter played the instrument on the Kraftwerk albums Radio-Activity (1975), Trans-Europe Express (1977) and The Man-Machine (1978).
- Patrick Moraz had a special version Model X (1975) of the Orchestron built for him, with three manuals. He used a prototype of it during the recording of Yes' Relayer (1974) album. Moraz also had an Orchestron Model B which he used on his The Story of I (1976) album. His Model X instrument broke and disappeared after being sent for repair.
- Vincent Gallo played an Orchestron on his When (2001) album released on Warp Records. It can be heard on the track "My Beautiful White Dog". Gallo also owns a working Model A, B, C, D, Double C and Double D as well as the entire VAKO blueprint archives. He purchased his Model Double D directly from David Van Koevering. It was Mr. Van Koeverings personal unit and the last unit built by his company.
- Rainbow keyboard players Tony Carey (1975-1977) and David Stone (1977-1979) used an Orchestron Model B. The choir sound can be heard on the songs "Stargazer" from the album Rising (1976), "Lady of the lake" and "Gates of Babylon" from the album Long Live Rock 'n' Roll (1978). David Stone can be seen playing the instrument at the very end of the promotional video for "Gates of Babylon". The Orchestron is also listed on the inner sleeve of the live album On Stage (1977), as part of the equipment used in the 1977 world tour. However, the instrument is not featured on any of the tracks.
- Foreigner's keyboardist Al Greenwood played an Orchestron on their hit "Cold as Ice" (1977), using the violins sound in the middle vocal break of the song.
Like the Mellotron, the Orchestron experienced a revival or sorts in the early 1990s, and many musicians embraced using the instrument for the first time since the late 1970s. The Orchestron however, had much less widespread use as there were very few surviving examples. And like the Chamberlin - most Orchestron sounds heard after the year 1999 will be from digital samples and not the actual instrument. Exceptions are from noted Orchestron owners and users.
- Michael Penn features a real Orchestron at the close of his song "Drained" from album Free-for-All (Michael Penn album) (1992).
- Benmont Tench played an Orchestron on Tom Petty's song "A Higher Place" (from the 1994 Wildflowers album).
- Semisonic uses a real Orchestron and the violins sound for their song "In Another Life" from their Great Divide 1996 album.
- AK-Momo uses an Orchestron Model A prominently on their album Return to N.Y (2005). The album was recorded using only Optigans, Orchestrons and Mellotrons. Swedish record producer and progressive rock musician Mattias Olsson has since the late 90s recorded several albums that features the Orchestron and Optigan prominently.
- The Orchestron Model A also features in the soundtrack of the 2010 Canadian Film Primordial Ties.
The improvement of the Orchestron over the Mellotron was overcoming the eight second limitation inherent in the Mellotron and Chamberlin designs. Although the sound quality was of lower fidelity, this was made up for in reliability as there were no tapes to potentially foul as in the Mellotron and Chamberlin. Although scratches on the disk could be audible, one could hold notes for as long as a key was pressed, and not worry about running out of sound when holding a note or chord. The downside of this was that the attack transient was lost and occasionally an audible thump could be heard on the discs when the loop point came around. This is usually hidden or masked in recordings through effects. The problem of audible loop thumps was addressed in another Mellotron related instrument called a Birotron. In the Orchestron, the most commonly used sounds were the "violins" and "vocal choir" sounds - the choir being taken from the Optigan's "Vox Humana" disk. An estimated 40 Orchestrons still exist today and replacement discs and new discs are being produced for the instrument. While not as popular or well known as the Mellotron, the Orchestron is still revered and sought after by musicians for the low fidelity and murky atmospheres it provides.