FUNCTION DESCRIPTION : 

The 914 Fixed Filter Bank is a non-voltage controlled modifier with 14 separate passband controls : high-pass, low-pass, and 12 center frequency knobs. Each passband range has an attenuation slope of 12 dB per octave above or below the center frequency indicated.

914 FILTER ALL POTS OPEN

MUSICAL APPLICATION

This Extended Range Filter Bank is highly useful for emphasizing or attenuating frequency bands in the mid-range of hearing. Instrument simulation, especially double reeds, is a major application for this module due to their varied resonances in mid-range frequency bands. Varying frequency response in each of the half/ octave ranges, even slightly, will change the timbre of a tone as it is moved from one region to the next. Radically different timbres can be overlapped from one frequency range to another, by utilizing the 914 as a fixed cut-off filter. In one range, a particular timbre may predominate when mixed with another. When the signal is moved into a cut-off range, the non-filtered frequencies of the mix will assume maximum importance.

In addition, the Fixed Filter Bank produces an interesting effect when used as a «fader» for full textured sounds or noise. Each frequency band can be heard individually as it enters or attenuated.

MUSICAL APPLICATION : 

This Extended Range Filter Bank is highly useful for emphasizing or attenuating frequency bands in the mid-range of hearing. Instrument simulation, especially double reeds, is a major application for this module due to their varied resonances in mid-range frequency bands. Varying frequency response in each of the half/ octave ranges, even slightly, will change the timbre of a tone as it is moved from one region to the next. Radically different timbres can be overlapped from one frequency range to another, by utilizing the 914 as a fixed cut-off filter. In one range, a particular timbre may predominate when mixed with another. When the signal is moved into a cut-off range, the non-filtered frequencies of the mix will assume maximum importance.

In addition, the Fixed Filter Bank produces an interesting effect when used as a «fader» for full textured sounds or noise. Each frequency band can be heard individually as it enters or attenuated.

914 FILTER 1000Hz PASSBAND OPEN ONLY 

The steep passband attenuation of each pot creates the characteristic peaks and troughs of this formant filter.

914 FILTER ALL POTS OPEN 

TECHNICAL SPECIFICATIONS : 

Signal input impedance : 100KΩ

Signal output Impedance : 1KΩ

Signal Gain : unity

Output Noise : ≤65dB

Power supply requirements : +12V@70mA / -12V@70mA