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Joemeek SC2.2, Руководство пользователя

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JOEMEEK Photo Optical Stereo Compressor SC2.2

The ORIGINAL JOEMEEK stereo compressor that now has additional 
features:

'Dark'/'normal'mode switch
Hard wired bypass facility

LIMITING AND COMPRESSION

Why is the JOEMEEK different to a modern high tech. compressor limiter?  
It was designed as a stereo effects compressor rather than a 'levelling 
amplifier' as the early compressors were called. These are the basic 
definitions:

A LIMITER is a device which stops the output of a signal path going above 
a predetermined level.

A COMPRESSOR is a device which reduces the dynamic range of 
programme material.

A 'perfect' compressor is an amplifier where the input/output ratio is 
constant: So using a 2:1 compressor, increasing the input by 2dB gives a 
corresponding 1dB increase in the output.

Early compressors which used variable mu thermionic tubes or 
photoelectric devices only approximated true compression over a limited 
range. They had a soft 'threshold' where compression started and held to a 
predictable ratio up to a certain level, then they returned to a more linear 
amplification allowing transients through. This is in stark contrast to modern 
VCA compressor/limiters where designers thought it 'sensible' to combine 
the functions of compressor and limiter and to 'stonewall' any and all signals 
above a certain level.

The musical effect is that (I know I'm over simplifying) VCA compressors 
sound muddy and flat, while old compressors sound lively and retain 
sparkle. 

JOEMEEK

 SC2.2

 

Stereo Compressor - User's guide

Содержание SC2.2

Страница 1: ...Stereo Compressor SC2 2 The classic JOEMEEK stereo compressor The classic JOEMEEK compression sound JOEMEEK C O M P R E S S I O N C O M P R E S S I O N JOEMEEK SC2 2 Stereo Compressor User s guide ...

Страница 2: ...1 JOEMEEK SC2 2 Stereo Compressor User s guide ...

Страница 3: ...pressor What it does 10 Regulations and safety 11 Tips on use 12 Warranty statement 13 Declaration of conformity 14 Ted Fletcher This instruction book was written by Ted Fletcher the designer of the original JOEMEEK compressor and the whole JOEMEEK range of professional audio equipment Ted worked in the studio with Joe Meek the legendary record producer in the mid 1960s 2 JOEMEEK SC2 2 Stereo Comp...

Страница 4: ...utput ratio is constant So using a 2 1 compressor increasing the input by 2dB gives a corresponding 1dB increase in the output Early compressors which used variable mu thermionic tubes or photoelectric devices only approximated true compression over a limited range They had a soft threshold where compression started and held to a predictable ratio up to a certain level then they returned to a more...

Страница 5: ...se the apparent deficiencies of the older technology providing a powerful artistic tool for the creative engineer Joe Meek used to say If it sounds right it is right To a lot of his contemporaries he went way over the top with overloading the record electronics on his Lyrec 2 track recorder and swathing his less than perfect singers in bathroom echo and reverb but his artistic use of non linear co...

Страница 6: ...e compression can be severe The compressor behaves in a similar way to a valve tube limiter The intermediate positions give a range of compression effect COMP VU switch changes the mode of the meter In COMP mode the needle sits at 0 and indicates approximate amount of compression by moving downwards IN VU mode the meter shows audio level before the output gain control COMPRESSION is the drive cont...

Страница 7: ...gent sounding This control reacts differently depending on the status of the dark switch In normal mode the compression release is smooth and linear in dark mode the release starts gently but releases quickly as the gain approaches normal this gives an even more urgent type of sound and often adds an apparent depth to the sound OUTPUT GAIN controls the gain of the final output driver amplifiers No...

Страница 8: ...ent is normally 4 or 0dB less expensive equipment is often 10dB Switch the meter to compression turn up the COMPRESSION control slowly and if there is sufficient audio signal the meter will start to indicate compression by the needle moving downwards The compressor should now be working and your ears can take over OPERATIONAL CONTROL EXPLANATIONS There are two main gain controls on the compressor ...

Страница 9: ... electronics are driven hard before the gain has been controlled by the light cells The cells catch up and overcompress momentarily giving a tiny dip immediately following the start of the note This is best demonstrated by using a drum track and setting the slope to 5 and attack and release to fastest Used sparingly this can contribute to musical drive Slower attacks and releases are used where th...

Страница 10: ...sion a bit more 4 I can t make the compression gentle enough It takes practice The setting of the Attack control close to fastest is quite critical as is the compression control 5 It won t pump hard enough Again it takes practice getting the gain control in the right range Set the slope on 4 and the attack and release at minimum then don t drive it too hard Work the input gain and the compression ...

Страница 11: ...with a way of enhancing the tape bend effect with compression The compressor he used was primitive in the extreme but coupled with the compression distortion provided by the valve tape machines he had the result was voice and music sounds that were unique and sold records by the million I had to make some significant improvements in the way the early compressors worked to make the JOEMEEK acceptab...

Страница 12: ...ce In the United States of America the compressor complies with UL requirements and uses UL approved components in all power supply functions POWER SELECTION JOEMEEK Compressors are fitted with a mains voltage selector for easy change of input voltage The fuse carriage can be pulled out and rotated to select to the local power voltage In the 115 position the unit will operate between 95 and 125V A...

Страница 13: ... the cymbals to really swish try leaving the kick drum out of the mix that goes through the compressor Limit the kick separately ideally with a Joemeek C2 then mix it back into the final mix The SC2 2 is absolutely ideal for drums the image stability gives the sound a control and perfect rigidity the dark switch adds a subtle depth GUITARS Wind it on The depth and sustain make it a must ORCHESTRAL...

Страница 14: ... warmth then use it again on sub groups in the mix so it pays to have more than one Thanks for buying the compressor I m now enjoying hearing its characteristic sound on records and productions from all over the world Ted Fletcher WARRANTY In the unlikely case of a breakdown please return the unit in its original packing through the supplier The unit will be attended to immediately and returned to...

Страница 15: ...que impedance matching facility Manufactured by FLETCHER Electroacoustics Ltd St Mary s Barton Road Torquay Devon TQ1 4DP ENGLAND Tel 44 0 1803 321921 Fax 44 0 1803 321922 e mail sales joemeek uk com DECLARATION OF CONFORMITY This analogue audio processing equipment conforms to the standards and requirements of the European Economic Community The EC Harmonised standards that have been applied are ...

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