Drawmer 1976 Operator's Manual - Page 7

Browse online or download pdf Operator's Manual for Computer Hardware Drawmer 1976. Drawmer 1976 13 pages. Stereo 3 band saturation and width processor

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LOW, MID & HIGH SATURATION & WIDTH

BANDS

The controls for the Low, Mid and High Bands are identical

and only differ in the frequency range that they operate

within, as set by the x-over frequencies

(3a)

SATURATE:

Sets the amount of drive that the saturation circuitry creates,

from none (0) through subtle and to extreme (10), adding

harmonic distortion within that band as it is rotated

clockwise, and warming the recording.

(3b)

WIDTH:

In order to increase/decrease the stereo width and

spaciousness of each band the 1976 manipulates the left and right phases of the stereo signal so that one side is

in/out of phase with the other. Using the control the width of the stereo image of each band can be made narrower

(-5 mono) or wider (+5 wide) than the width that the incoming signal supplies. At the 0 position the width is not

affected (i.e. the Left and Right phase is unaltered) and is the same as that in the input.

You'll notice that the nearer the mono end of the control the volume level of the band increases and when wider the

level decreases, and this must be taken into account when adjusting the Level control

balance within the recording.

(3c)

LEVEL:

(3a)

As the Saturation

is needed to offset these changes so that the overall level balance for low, mid and high within the recording is

maintained.

(3d)

BYPASS:

In the OFF position all the controls of that particular band are in operation and saturation and width takes place. In

the ON position the signal for the low, mid, or high band is allowed to pass through to the summing stage without

being altered by the saturation stage (including width and gain).

(3e)

MUTE:

In the ON position the signal for that particular band is effectively turned off (muted) and will not be heard at the

output.

Any combination of bypass and mute is available, for example, to hear only the signal of the low band mute the mid

and high bands etc. Using a combination of mute and bypass switches for the various bands allows the operator to

hear and monitor only the frequencies that are required and so 'tune in' to the low, mid and high frequency settings

using the x-over controls

OUTPUT

The individual signals from the three bands are summed back

to a single stereo full band and pass through the output circuitry.

(4a)

LEVEL TRIM:

The 1976 provides a single control to modify the stereo output

level after summing, without having to adjust the three band

gain controls (and thus altering the mix). Adjust so that the

output signal approaches the desired level only on signal peaks.

(4b)

VU METER:

A 16 Led bar meter provides visual monitoring for the left and

right signals.

What is heard at the output is shown on this meter, so, with all

bands in operation the full band stereo signal is shown. However,

using a combination of the mute

any combination of signal.

(4c)

MONO:

If you wish to record in mono treat the left and right channels as separate and use accordingly for both tracks. The

MONO switch in the output section is not used to monogise the signal for recording, as such, but has been

incorporated as a testing feature. Because the 1976 alters the phase between the left and right channels to control

the stereo width, activating the MONO switch

will cancel each other out leaving just the signal that lies in mono. This allows the engineer to hear what signal is

lost should it be played in mono and emphasize when you have 'gone too far' with the width controls

band. These can then be adjusted to preference.

(4d)

BYPASS:

A fully balanced hard-wire unit bypass connects the input directly to the output. When active the VU Meter

show the input levels.

(4e)

POWER LED:

The 1976 is on when the Led is illuminated, as controlled by the power switch on the reverse of the unit.

(2)

0 - 10

-5 (MONO) - +5 (WIDE)

OFF - +6

(3b)

and Width

controls have an affect on the volume of that particular band the Level control

ON - OFF

(2)

OFF - +12dB

-20 - +15dB

(3e)

and bypass

ON - OFF

Illuminted - OFF

DRAWMER 1976 O

(3d)

switches within the bands the meters can be made to show

(4c)

will combine the stereo channels, the phase of the left and right

PERATOR'S

ANUA

(3c)

to maintain the band

(3b)

of each

(4b)

will