4.4 Using the Vt-747sp
The opto-compressor of the Vt-747sp has
the standard features of a typical outboard
compressor plus a few other unique features
like no other compressor. Basic operation is
as follows:
1. Engage the COMPRESSOR push-button.
This will insert the compressor into the signal
chain.
2. Set ATTACK to FAST.
3. Set RELEASE to FAST.
4. Set COMPRESSION to 20:1 (fully clockwise)
5. Set THRESHOLD to –30dB (fully counter
clockwise)
6. Test compression by introducing signal.
Needle should move rapidly for any substan-
tial input signal. Turn up the INPUT GAIN if
needle is not moving.
8. Fine tune controls for desired effect.
4.5 Six Band Passive Equalizer
The six band graphic equalizer is extremely
smooth and musical. The six frequency
bands and corresponding Q settings have
been carefully chosen to provide the most
natural harmonic balance and lowest phase
change while offering simple and effective
tone control.
The following is a description of the six fre-
quency bands.
From Low to High (left to right)
1. +/- 24dB 15Hz shelf response
2. +/- 8dB 125Hz selected Q response
3. +/- 4dB 500Hz selected Q response
4. +/- 4dB 2kHz selected Q response
5. +/- 10dB 5kHz shelf response
6. +/- 20dB 32kHz shelf response
4.6 Using the Equalizer
The equalizer section of the Vt-747sp has
been designed to be easy to use.
Engage EQ push-button (illuminates "IN") to
insert the EQ in the signal path.
All six faders have a center detent. When all
faders are set to center detent the EQ is
completely flat.
Pushing a fader up from the center detent
boosts the corresponding frequency band
and pushing a fader down from the center
detent cuts the corresponding frequency
band.
Because of the passive design, the equalizer
on the Vt-747sp is smooth and musical. It can
be used to subtly shape and color while still
keeping the signal musically balanced
(program equalizer.)
Page 18 Avalon Vt-747sp Operation Manual
Operation and
Controls
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