dbx 122 - Page 24

Making a dbx-Encoded Copy from a Non-Encoded Tape
Making a dbx-encoded copy from a non-encoded tape is
occasionally desirable. The copy will not add any audible
noise. This type of copying can be done with the installation
described below.
If your preamp (or receiver) has two tape monitor loops
with switching for ‘‘Dub B to A” or similar copying provi-
sions, no special connections are required. Just connect the
system as shown in Figure 14.
1. Set the dbx front panel switches as shown below:
poe @o
Press REC instead of PLAY
for 4-channel tapes
2. Set the ‘‘master’’ tape machine (machine B) to Play
mode and the “’slave’’ machine (machine A) to Record
mode. Peak VU meter readings on the ‘‘slave’’ machine
should be the same as used for dbx processing.
Overdubbing and Sound-On-Sound with the 124
The dbx 124 will both encode and decode simultaneous-
ly and thus allows stereo monitoring (or real time source/
tape comparison) when used with three head tape machines.
Overdubbing and “‘sound-on-sound”’ also becomes possible
in the two channel format. For example, sound-on-sound is
made possible by placing jumper cables between the output
of one or two tape recorder channels and the input of
another channel or channels. In such cases, the dbx 124 can
23
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et
IVA yy:
(mic preamp
may be built
into mixer)
(or another
mic input}
(or additional
channels in
machine A)
Fig. 16 — Connections for Overdubbing with the 124
Use a ‘4-In, 2-Out” mixer (a mixer with provision for
accepting four input signals and assigning them to either of
two outputs).
be inserted in the jumper line, decoding the deck’s play
output, and re-encoding the record input.
Suppose you wish to add voice to an instrumental track
already recorded in stereo (encoded) form. Either a 4-chan-
nel tape machine, or two stereo machines are required.