DEQ7

1987 (Nov.)Initially sold for ¥150,000 Features: • Graphic EQ (GEQ) ProgramsThe DEQ7's GEQ programs provide 18dB of boost or cut. The four EQ configurations include: 1-octave filters (10 bands), 2/3 octave filters (14 bands), 1/2-octave filters (17 bands), and 1/3-octave filters (27 bands). All programs are stereo with the exception of the 27-band 1/3 octave configuration. Both a left channel and a right-channel version of the latter are provided, so two DEQ7's can be combined (using the direct digital inputs and outputs if desired) to provide a full stereo implementation. • Parametric EQ (PEQ) ProgramsThe "PEQ (4+4)" programs are versatile 4-band parametric equalizers. Each band offers independent center-frequency control in 1/12-octave steps over a 20Hz–16kHz frequency range, 18dB of boost or cut, and Q (bandwidth) control from 0.1 to 10. The "PEQ+SHELV" program is configured as a 2-band parametric equalizer plus variable low and high shelving equalizers. • Tone Control ProgramsThe "L=R" and "L/R" versions of the tone control program offer bass/treble-type tone control similar to that found on home audio equipment. The bass range rolloff frequency is 200Hz and the treble rolloff is at 5kHz, and each range can be boosted or cut by up to 18dB. The "TONE CONT. NOTCH" program provides a more sophisticated bass/treble tone control system. In addition to independent left and right channel parameters, the bass range rolloff frequency can be varied from 20Hz to 1.2kHz, and the treble rolloff can be varied from 800Hz to 16kHz. As with the other "NOTCH" programs, a variable high-pass filter, variable low-pass filter and three-band notch filter are included. • Band Pass & Band Rejection Filter ProgramsThese are extremely versatile bandpass and band rejection filters that permit the creation of virtually any type of response by combining variable high-pass and low-pass filters. Both the frequency and the slope of the high-pass and low-pass filters are variable. • Dynamic EQ & FIlter ProgramsThese programs create a wide range of sweeping peak-EQ or filter effects. In the "DYN. PEQ" programs the gain of the filter peak can be set to 6, 12 or 18dB, and the Q (bandwidth) of the filter response can be set to low or high. The "DYN. FILTER" programs offer a choice of filter types: low-pass, high-pass, bandpass 1 (1-octave bandwidth). The slope of the filter response can be set to 12 or 24dB/octave. In both programs a rising sweep (increasing frequency) or falling sweep (decreasing frequency) may be selected. Both dynamic EQ programs are provided with three different control implementations: in the "FC" programs the sweep is controlled either by a foot controller, or by a MIDI "foot control" or "note-on" message. In the "LEVEL" programs the sweep is triggered by the input signal. And in the "LFO" programs an internal low-frequency oscillator sweeps the filter automatically.