User Manual

Transpressor

Twin Core Compressor

Control Elements

Detector/EXT SC, OFF, FILTER

Use this three-stage switch to determine how the compressor’s sidechain is to be fed, i.e. the

internal chain where all processing takes place. In the center position, “OFF”, the audio signal

feeds the sidechain, so the compression affects the whole frequency spectrum. This position

is the default setting.

In the upper position, “EXT SC” (short for “external side chain“), the SIDECHAIN input on the

rear panel is active. The compressor is, thus, controlled according to the signal fed into the

sidechain input. In other words, the compressor can be used to process the input signal while

being controlled with a modiﬁed or totally different signal. For example, you could make a

copy of the original signal, ﬁlter it with an EQ and then feed it into the sidechain so that the

compressor only responds to a speciﬁc part of the signal (or vice versa, if the frequencies are

cut instead of boosted). Another common use of the sidechain is ducking. For example, if you

wanted to separate the bass drum from the bass guitar you could compress the latter with the

former by feeding the bass drum into the sidechain. The bass guitar would then “duck” every

time the bass drum kicks in, providing more precision to the low end. Using this technique,

you could also give rhythm to sound pads, so that they swing a bit more.

To activate the Transpressor’s internal ﬁlters to control the sidechain, select the lower posi-

tion, “FILTER”. Refer to section “Detector/1, 2, 3” for further details.

Detector/1, 2, 3

The internal frequency filters of the Twin Core Compressor are a very convenient alternative

to external processors. You have two low-pass and one bandpass filter at your disposal, so

that compression can be focused at specific frequency ranges. Do note that in order for the

specific filter to be active, the EXT SC, OFF, FILTER switch has to be set to “FILTER”.

LP1 activates a low-pass filter with cut-off frequency set at 100 Hz and a 18 dB/octave slope.

The compressor responds only to low frequencies.

LP2 activates a low-pass filter with cut-off frequency set at 680 Hz and a 18 dB/octave slope.

Processing affects only the low and mid frequency ranges.

BP activates a bandpass filter with cut-off frequencies set at 800 Hz and 3.1 kHz and a 12 dB/

octave slope. This filter is ideal to focus on vocals.

GR meter

The GR meter indicates the signal’s gain reduction as a result of the compression. Since the

meter indicates a reduction in gain, it works downwards. The 10-segment LED meter ranges

from 1.5 dB to -21 dB.

When the maximum reduction — corresponding to the highest signal level — indicates, for

example, -8 dB, you should set the MAKE UP control to a value around +8 dB to achieve the

best results (refer to “MAKE UP” on page 15).

OUT meter

The OUT meter indicates the output level after passing through all control elements. The

meter ranges from +18 dB to -9 dB. Even though the MAKE UP and PARALLEL MIX controls

have the most impact on the output level, all other settings in the different modules also have

an effect on the overall level. The OUT meter has a peak hold LED that indicates and holds, for

about one second, the last peak value. This indicator makes it easier to read peak levels.