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An electronic musical instrument that can generate it's own sounds. Not to be confused with sampler.
A MiniMoog is a synthesizer, a Yamaha Motif is a sampler.
by SynthBaron November 28, 2003
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A musical instrument that generates sound using oscillators, LFO's, filters, sequencers, and other things of that nature. Most true synthesizers are controlled with three things, a keyboard of various sizes, pitch bend and modulation wheels, and a complex interface of knobs and switches. The Minimoog is a great example of this. But the main thing that makes synthesizers so unique and beautiful sounding is that they are not limited by the physical world to create sound. They are not a string instrument, wind instrument, or percussion instrument. Synthesizers are classified as quintephones. Which means they create sound informaticly. Synthesizers are very expensive but are a great thing to own and use!
The Minimoog is a synthesizer with three oscillators, the very first electronic music filter ever created, and therefore sounds incredibly fat and meaty.

Synthesizers are primarily used for electronic music and classic rock.
by DesiciveToxiNN December 28, 2011
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An electronic music-creating device that directly alters electric current to shape sound waves. They are often controlled with piano-like keys but in reality they can be controlled with many interfaces such as a guitar, wind instrument, or even something you don't directly touch like a theramin. It is likely that in the future, most synthesizers won't be controlled by a traditional keyboard as it is quite archaic in it's nature.
Synthesizers are used mostly in electronic music.
by psx1337 December 11, 2006
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Both the electric guitar and the synthesizer are electricity based instruments. The main difference is that a synth player is looking for affection from his instrument, rather than from his female fans.

Oh and the synthesizer is played with keys that trigger oscillators, which are led through a series of customizable filters to shape the final sound, whereas the electric guitar is played by touching strings moving in the mangetic field of the pickup coils, or not at all if the amount of affectionate female fans prohibits this. A solution for the guitarist finding himself in this situation is to touch the strings of the female fans.

Synth players who think that the fans are coming too close are advised to buy more synths and build a little synth fortress around themselves on stage.
After getting married, John decided to buy himself a synthesizer to replace his now useless guitar.

Even though he played nothing but synthesizers, the artist had a huge share of good looking female fans.

Bill used to play guitar just to get some, but later found out he actually had musical talent and hence switched to synthesizers.
by Nicolas Herdwick November 16, 2006
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