Synth Site: Korg: Sigma: User reviews Add review
Average rating: 4.6 out of 5
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Ken Freeman a professional user from UK writes:
Popularised by Steveo in the late seventies and later Mike Oldfield, the Sigma doesn`t look right unless there`s a Lambda under it and the pair are magnificent, THE synth used for Oldfield`s Blue-peter theme tune (along with obligatory Lambda), the sigma was too expensive for a preset machine aftertouch or not so it didn`t sell well. a shame because they`re rare now but if you DO see one it`ll be cheap.

Listen to late 70`s Mike Oldfield then play one and you`ll get the idea that the Sigma was probably the best preset Monosynth ever, the Lambda was definately the best stringer with it`s 3 VCOs and 96 envelope generators.

Rating: 5 out of 5 posted Wednesday-Sep-08-1999 at 19:52
leo Z a professional user from Colorado USA writes:
Ever since i got my Korg sigma and for all that time i can not stop playing with it. - never got board. First thing to mention is that this synth is purely UNIQE It does not resembled anything i ever heard before . and looks like a organ/synth hybrid. Keeping in mind that this synth was designed at the same the time as The KORG MS series Synthesizers. ( same designer) All the Osc ,envelopes and filters are the same as the ones youll find in the MS-20 I do own also the X-911 ( gtr synth) that the synth section is kind of from the same family. There are "18" Oscilators running at the same time.... Plus One noise osc with Attack/release control, and lots of effects... Sigma is really a mono performing synth you can sit down and change the sound again and again just by adding more oscilator to the party. than coloring those Oscilators with diffrent controls such as Attack/Release , Decay, Freq-filter control , Pulse Width , Tone, S/H Clock ( cool LED for timing) But the coolest features are: Ring modulation with control of pitch that makes this synth sound almost like a DX-7 on acid... Imagine these old VCO with digital flavores. ( when you using the LP filter sometimes a flute can sound as if it was fried with eggs...) there are also 2 joysticks. one for VCF and HP/LP the other one for Pitch shift ,Vibrato and the most Weird effect ever "Noise Depth" that sounds like increasing amount of sweet distortion. The effect section covers all the regular known effects - Portamento,vibrato,oct high/low, Multi trig, Hold, Keyboard Sens ( if you push down youll get the effect-After touch ) and a "Quarter note effect" - when you use this one, the notes are runing in 1/4 notes instead of 1/2 notes so the scale of the key will change to major scale almost to a minor scale... for example If you hold down the key of C and also press the key of D the sound is key of C#... I also used it on pitch shift which is really cool. Oh yeah you can also push a button ( ala JUNO 60 Vibrato ) for the portamento in/out effect - on the fly. All and All - this is really one weird mono beast with a rainbow of sounds - from a hoolow "CASIO-TONE" to heavy DX7 through MS20 like colored lead. I did use it as bass synth and weird effects noise-box but the best use is the screaming distortion like leads. Now, if you have some other old synth with ext input - run the sigma through them (use the CV/Gate ) its amazing I tried it with Minimoog, X911, Arp Axxe and the Roland SH09 its sounded diffrent in every situation but was making the sound much much more interesting the only drawback is - TIME...youll need a lot of time to play with this old toy. Time just fly by and away... while twiking those little knobs. If you find one - BUY IT !!!!

Rating: 5 out of 5 posted Friday-Feb-12-1999 at 23:43
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