STANDARD PATCHES AND SET-UP ADVICE
The standard patching setups described here are
not rigid commands. Rather, they are provided
with the hope that they will stimulate your
im-
agination when you have mixing needs that can-
not be solved with the standard setup. Line level
is
line level, whatever the source, and many line-
level inputs to the M -35 offer
a
route to a mix
that will be used for
a
function other than the
one that
is
labelled on the top panel. The Jacks
on the back are there to be used. Patching
is
not
a crime and may be used to improve the quality
of your signal by bypassing
unneeded controls,
or by making additional
control possible in un-
orthodox ways.
Most
people tend to look for
a
"permanent" set
of connections when they set up
a
mixing system
and
it
is
true that the logic of control function
just on the top of the mixer takes some
time to
become familier with, but multichannel record-
ing has many mixing
requi rements. A permanent
patch
will severely restrict flexibility. Don't be
affraid to re-plug. There is nothing wrong with
the concept.
If you can examine the system needs
of each mode of operation and re-patch the M-35
to suit, you
can get better results.
For this reason, we suggest that
you plan on ac-
cess to the back panel of the mixer. Don't set up
the system in such
a
way that you "hide al1 that
mess". Leave
yourself room to get al1 al1 the con-
nectors. You will need al1 the options you can
get.
RECOMMERIDED 8-TRACK SETUP
The basic function discussed in this
manual as-
sumes
that you will need to playback what you
have recorded many times before final mixes are
made.
Since it
is
unlikely that you will be record-
ing
a11
8 tracks
at
one time, the fact that the M-35
has
only 4 buss master modules
is
not a serious
limitation. Here we show each buss master con-
nected to more than one track. Tracks
1
and 5
are on the
same buss,
#l
and so forth up to Buss
4 Output, connected to tracks 4 and 8. When
you are ready to mix to stereo, you
will have to
change your patch to feed the 2-track. Designed
for quick playbacks, the Monitor system
elimi-
nates the need to distrupt the Input IModule set-
tings you are working with. Since "LINE IN" on
the Input Module is not used for
playback of
your recorder in this patch, these Jacks are
avail-
able for any other unit or units you may have.
Moving to "LI NE IN" will, of course, force you to
re-set the input controls if you
have been using
a Microphone as an Input.
Only one Echo system is shown.
Since most re-
cording isdone "dry" or without Echo, one cham-
ber should be sufficient.
In
al1 patching and connecting of 2-wire single
ended, circuits two basic
rules are worth remem-
bering:
1.
Keep your cable runs SHORT!
-
as
short as
possible. Installing
a
patchbay behind the en-
gineer will require
at
least 20-foot runs and is
not recommended. To the left or right side
will allow much shorter runs, and wisest of al1
is
to use our PB-64 mounted on top of the
Meter Bridge
itself. This location will permit
the shortest
lengths of cable run, and will im-
prove your sound. Incidentally, short runs cost
less,
also
a
benefit. TEAC low-loss cable
is
available and
its
low capacitance per foot and
superior insulation has been designed with sys-
tems like this in mind.
It
is
well worth
its
extra
cost. The use of 3-conductor professional cable
such
as
Belden 8451 should be avoided. Even
though it
is
of excellent quality, it is not the
right idea for 2-wire systems.
If you are going
to make
up your own cables we would suggest
our 500 ft. bulk
rolls or cable such
as
Belden
8218. Solid
core insulator, low capacity wire
is
what you need. Foam-filled 2-conductor
is
not recommended, as the center conductor
will cut through most foam with time, the ca-
pacitance will go up, and eventually the cable
will short circuit. Don't use it.
2. Multiple output connections
require imped-
ance matching calculations. Make sure you are
not asking too much of your output stages.
Permanently connecting
severa1 cables to
a
singleoutput may produce poorquality. If you
are not using a patch,
unplug it! Convenience
may cost you quality, unless you are sure that
a
multiple connection iswell within safe limits.
Use the section on impedance matching in this
manual, abide by the limitations
it
covers, and
you will get better
results.
Using
a
Y-cable to "sum" or join two outputs
to one connector
will NOT BE POSSIBLE.
Since there is no "one way" sign on
a
wire,
signal from one side of the "Y" will flow back
into the mixer as
weII as on to the next device.
Summing, or adding two signals together, re-
quires that they be isolated, and simple joining
of the hot leads
will not work properly.
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