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GForce Orchestron Expansion for M-Tron Pro




Availability: Immediate email delivery.

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Key Features

12 New tape banks all looped
35 Notes per tape bank
Extremely rare sounds
Over 100 New MTP Patches


What is the OrchesTron Expansion Pack For M-Tron Pro?

As the name suggests, it's an add-on pack for M-Tron Pro users with sounds recorded from the ultra rare and ultra desirable Orchestron optical playback instrument.


What is an Orchestron?

The Orchestron is an optical playback instrument manufactured in the 1970s. It generated sounds based on the same technology as the Optigan but instead of having a rhythm and effects section, it simply focussed on providing a single sound spread across the keyboard.



Essentially, celluloid discs containing pre-recorded sounds were inserted into the instrument and the optical head allowed you to playback this sound.


What sounds were available?

There was a library of 8 discs available including: Cello, Vocal Choir, Flute, French Horn, Hammond B3, Pipe Organ, Saxophone & Violin.


What sounds are included in the OrchesTron Expansion Pack for M-Tron Pro?

The aforementioned Cello, Vocal Choir, Flute, French Horn, Hammond B3, Pipe Organ, Saxophone & Violin. Plus; Marimba, Piano, String Ensemble & Tremolo Electric Guitar.

That's 12 sounds in total.


Where did these additional sounds come from?

These are taken from extra discs made for Orchestron owners and come courtesy of Pea Hicks, owner of and custodian of all things Optigan and Orchestron.


What do they sound like?

These sounds have a similar lo-fi quality as the Optigan lead sounds and we obviously advise anyone to listen to the demos so they know exactly what their getting before purchasing.

If you're after glossy hi-fi sounds, these are NOT for you. But if you want grainy, scratchy, lo-fi sounds, where occasionally it's more a case of 'noise to signal ratio' we think these are rather magnificent.


Are there any tracks I would know of where the Orchestron was used?

Probably. Kraftwerk used the Vocal Choir and Violins on Radio Activity, Man Machine and Trans Europe Express. If you listen to the opening string ascending part for Trans Europe Express, you can hear the Violins clearly. Also the Choir after the first minute of Europe Endless is all Orchestron.

Other artists and bands we're aware of who used the instrument include Patrick Moraz, Foreigner, Rainbow and Patrick Warren.


What happened to the Orchestron as an instrument?

In short, it died and it's believed out of the various models that saw light of day only around 30 still exist today.


If I want an Orchestron, how much would I be expected to pay?

Honestly? Too much! The last one we saw go on eBay went for over $6000 and given the lo-fi nature of the sound, coupled with the reliability issues you'd face as an owner, we're not sure if it's worth it.

That's one reason why we decided to do this add-on pack - to once again put rare and coveted sounds in the hands of M-Tron Pro users for a vastly more affordable price than an original instrument


Works With


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M-Tron Pro Expansion Packs are only available to registered users of M-Tron Pro. Additionally, they are exclusively available as direct downloads at

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The Original Instrument

While we love and admire the engineering of the original hardware machines, we also think hardware and good software should sit side-by-side. Because although the hardware versus software debate still rages, ad nauseam, the simple truth is that there's no definitive answer as to which is best. Just as there is good and bad hardware, there is good and bad software and the answer to this conundrum will depend on all manner of things including your personal perspective, available space, your technical savvy, your preferred working environment and of course your finances.

For example, do the majority of musicians looking for ‘that sound’ really care to maintain a forty-plus year old instrument, sourcing rare parts when they wear out or break?

Naturally we care, because we feel that we’re custodians of these instruments and while many other software companies simply hire-in instruments to record or model, we consider this bad practice. In our opinion good practice is when you've lived with and loved the original instrument's character and foibles for a considerable time before beginning any emulative process. Because, then and only then, do you stand a chance of capturing some of the instrument's soul and character within the software alchemy.

It's a simple dogma but you'd be surprised at how many software companies ignore this in favour of marketing hyperbole. Indeed, when we explained our philosophy to the marketing director of one such company, he said "No one really cares" and strolled off to no doubt perpetrate more marketing myths.

For us that fundamental understanding and love for an instrument is what really matters when trying to transplant its character. You see, we can tell the difference between good or bad, lazy or indifferent, marketing bullshit versus a real love for the authentic, because we’ve been immersed in these instruments for over 30 years. And in the case of Streetly, over 50 years!

But ponder this - while we’ve thrown countless bags of money at the purchasing and maintenance of all manner of tape replay instruments from Chamberlin’s to Mellotrons, we’re the exception. We’re committed (some would say ‘certifiable’) and we do it so that you don’t have to.

If you want an M400 plus all the tapes we supplied with the M-Tron Pro, you'd be looking at £20,000 plus, as opposed to the M-Tron Pro's £140. Likewise, if you wanted to buy the physical tape frames of a Streetly Tapes Volume for your original M400 you’d be looking at a price tag of at least £5,000, whereas at 1% of that each Streetly Tape Volume represent amazing value for money.

It’s something worth bearing in mind the next time that someone tells you that hardware is better than software.