Joemeek C2, Руководство пользователя

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C2 Stereo Compressor- User's guide
C2 15
COMPRESSION BY-PASS : switch introduces audio path gain
adjustment and instant muting of the compression sidechain so that true comparisons
can be monitored.
SYSTEM DESCRIPTION
Stereo audio balanced signals are received by the dual 'superbal' input stages which
provide ideal input conditions and minimise common mode interference. The input gain
stages form a matrix which produces a 'sum and difference' pair of signals ('MS' stands
for 'middle and side', the 'sum' signal carries the main or 'middle' information while the
'difference' signal is the 'side' or stereo positioning information) which are then
compressed separately, but using the same sidechain. Compression metering is driven
directly from this sidechain giving a reading of dB compression. Audio level metering is
driven direct from the 'sum' signal after compression giving an accurate state of the total
stereo level within the system in dBs. The compression attack time is continuously
variable, as is the release time. Both the attack and release characteristics are non-
linear and follow established curves which give the Joemeek compressor a unique
sound. Compression by-pass is done by disabling both the sidechain and the optical
cells, while at the same time reducing the system gain to compensate for compression.
This gives a similar effect to a true 'hard wire' by-pass; but with the advantage of
keeping any gain make-ups.
After compression, the Sum and Difference signals are reconverted back into
conventional left and right with a second matrix which incorporates the output gain
control. After the output gain stage, the left/right signals are fed to a pair of symetrical
balanced output stages which give optimum drive conditions to balanced lines.
The use of the 'sum and difference' compression method eliminates any error in
left/right level during compression as well as correcting for any electrical gain error in
either the input or the output gain controls.
REGULATIONS AND SAFETY
The JOEMEEK Compressor has been designed and built to conform to all known safety
requirements in the world. Within the European Union the Compressor easily meets the
requirements for electrostatic and electromagnetic emissions, and conforms to all safety
requirements of the European Common Market, the 'CE' symbol on the rear of the unit
indicates compliance. In the United States of America the compressor complies with UL
requirements.