Find great deals for MOOG Concertmate Mg-1 Analog Synthesizer – Vintage Mg1 Realistic S. Shop with confidence on eBay!. I pulled my Concertmate MG-1 synthesizer out of storage for my next Arduino project (to be described later), only to find that it wasn’t working quite right. The MG-1 was manufactured by Moog Music for Radio Shack for their Concertmate line of casio-like keyboards. However, the MG-1 is a true Moog, somewhere.

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These are some nice synth hits and bass lines from this cheap Moog. The Contour settings can only affect Polyphony while a key is pressed due to the Polyphonic gate design. In the schematic below, op-amps U10A mv-1 U10B feed the differential output signal into the amplifier. Since the polyphony section is independently tunable, it can function as a rudimentary third oscillator, allowing the user to create more complex tones than on similar 2-oscillator synths. In conclusion, I succeeded in fixing my MG-1 and getting that lovely, rich Moog sound.

Thanks to Concsrtmate White and C.

Moog Concertmate MG-1 – MOOG – Encyclotronic

You need to be a member in order to leave a review. The main problem with the MG-1 was a loud click a bit like a kick drum when I pressed mt-1 released a key.

Second, both Rogue oscillators share the same waveforms and octave range selectors, whereas on the MG-1 there are separate selectors for each. This page was last edited on 27 Octoberat Therefore it is true that the Poly tones are not “faded out” by the Fall time release contour setting when a key is released.

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Next, I stared at the schematic for the contour generator that feeds into the CA amplifier, but couldn’t see how that could be going wrong. Polk for providing information. There is a headphone output as well as a set of stereo phono rca plugs for output and “input”.

Although this keyboard is often erroneously described as having “less” features than its Moog siblings, the Liberation and the Rogue, there is a patch which only the MG-1 can do: In addition, the contour input showed it was picking up some crosstalk from the oscillator 1 trace that runs next to it, and this was being amplified into the buzzing noise.

Sign In Sign Up. Unique Modulation Options Although this keyboard is often erroneously described as having “less” features than its Moog siblings, the Liberation and the Rogue, there is a patch which only the MG-1 can do: Concertmage MG-1 User Group.

There are RCA inputs and outputs the input is routed straight to the output for playing along with music from your stereo system but no external speakers as in most other home marketed synthesizers.

Fixing my Concertmate MG-1 Synth

Who played this instrument? Conveniently, the Service Manual is available online. This allows the creation of Saw- and Cobcertmate waves, as well as asymmetrical Triangle waves and unusual trapezoids, not otherwise found through modulating with the LFO alone.

Both models share exactly the same plastic casing, but are different machines in many respects. There are potentially several more mods you can do to this thing to make it shine. All signs pointed to a problem with the CA amplifier chip, which was somehow amplifying a big DC signal. Why stereo phono plugs?

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Panel Layout The synthesizer’s features aren’t labelled using the usual synthesizer nomenclature, instead using more “laymen friendly” terms such as “Tone Source” for the oscillators, “Contour” for the envelope with “Rise Time” for Attack Time and “Fall Time” instead of Decay or Release Time.

It is a common misconception that the Poly tones are not affected by the Contour settings. Keyboard – 32 keys. By using this site, you agree to the Terms of Use and Concertmatte Policy.

MOOG Concertmate Mg-1 Analog Synthesizer – Vintage Mg1 Realistic S

It is a lot like the strap-on Moog Liberation in its design and architecture and also looks and sounds very much like the Moog Rogue. Because it was originally distributed in Radio Shack stores instead of specialized music stores, it is easily found and is cocnertmate less expensive than a Rogue despite actually offering more.

The output goes into the conceftmate volume control, and then to the synthesizer outputs. Second, both Rogue oscillators share the same waveforms and octave range selectors, whereas on the MG-1 there are separate selectors for each.

Against these limitations, the Polyphony is total, meaning all 32 keys can sound all at once. TG2 is detunable and can be synced to TG1.