A filter filters out certain frequencies in the sound. There are four main types: a low-pass, high-pass, band-pass and notch, which are covered elseware in the glossary. Filters have two controls - the frequency control selects at which frequency the filter should start operating and the resonance control creates a peak just before the bit where it starts filtering out frequencies. This is used to create acid-type sounds....
Minitmoog
Basically an expanded Satellite, the Minitmoog is one of the rarest of all the Moogs, due
to the fact that so few were made. It is a monophonic, dual oscillator (with sync), preset
synthesizer with aftertouch, which can control sync sweep, pitch bend, filter cutoff, or
modulation. The available presets were Mute, Trumpet, Oboe, Clarinet, Sax, Taurus,
Violin, Piano, Guitar I, Guitar II, Aries, Lunar, and Flute. It was transposable down 1, 2,
or 3 octaves and it had height-adjustable back legs.