Focusrite Green Range Manual
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Focusrite Green Range Manual

Focusrite Green Range Manual

Green range
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CHANNEL
S TRIP
manual

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Summary of Contents for Focusrite Green Range

  • Page 1  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ  AAAAA QQQQQ ...

  • Page 2: Table Of Contents

    c o n t e n t s GREEN 5: CHANNEL STRIP Introduction ..............4 Getting to Know the Unit .

  • Page 3: Green 5 Channel Strip

    c h a n n e l s t r i p Green 5 Channel Strip Introduction The Channel Strip is a combined preamplifier, equaliser and dynamics unit. This makes it an excellent recording tool, since you no longer need to use a mixing desk when recording: instead, you need just a microphone, recorder (such as a DAT machine) and a Channel Strip to record direct, monitoring using the return from the recorder.
  • Page 4 i n t r o d u c t i o n 2. Ensure that all the buttons on the front panel are out (not lit). Adjust the signal level into the unit as described in the section Setting the Gain. 3.
  • Page 5 c h a n n e l s t r i p 7. To monitor the effect of the gate, press the Gate In button (so that it lights), and adjust the left-hand threshold control, which is the threshold control for the gate. Adjusting the threshold clockwise gates more signal –...

  • Page 6: Connections

    There is an IEC mains lead supplied in the package which should have the correct moulded plug for your country. The wiring colour code used in all Focusrite products is: For units shipped to the USA, Canada, Taiwan and Japan Live –...

  • Page 7: Audio Inputs And Outputs

    c h a n n e l s t r i p Audio Inputs and Outputs All the audio signal connections are via connectors mounted on the rear panel. Instrument Input Hi–Z +18dB Line Inst Line Input Mic Input XLR input for microphones only. Line XLR input for line level signals (such as the output from a tape machine) .

  • Page 8: Link Socket

    s e t t i n g u p Link Socket This is a stereo jack socket that you can use to connect the compressor sections of two Channel Strips. When you connect two units (using a normal stereo jack to jack lead), the compressors behave as if both units were receiving the same volume signal.

  • Page 9: Selecting The Input Signal

    p r e a m p l i f i e r Preamplifier Inst +1 +2 +3 -20 -10 -7 CHANNEL STRIP Input Trim Output Fader – – Ø Controls The Mic and Input Trim rotary controls set the gain on the input signal (see the section Setting the Gain).

  • Page 10: Setting The Gain

    f u n c t i o n s Setting the Gain Depending on the input you are using, you use either the Mic rotary control or the Input Trim rotary control to set the gain: Input Rotary control Inst or Line Input Trim Use the meter and the correct rotary control to match the incoming level and gain to the internal operating level.

  • Page 11: Equaliser

    e q u a l i s e r Equaliser An equaliser is a sophisticated tone control, that boosts or cuts selected frequency bands, and so alters frequency response. By modifying different frequency bands in this way, you modify the tone quality of instruments and vocals, which can fix problems with the original sound, or help a track stand out in the mix, for example.
  • Page 12 f u n c t i o n s Instrument Input Hi–Z +18dB Input Trim Line – Freq Inst Line Input Mic Input INPUT TRIM FILTER STAGE Audio Path Filters INPUT STAGE To Compressor Side Chain KEY INPUT EXT. KEY SWITCH To S/C To Gate/Exp Side Chain...

  • Page 13: Using The Low And High Filters On Audio

    e q u a l i s e r Using the Low and High Filters on Audio The Low and High filters are usually used to correct problems with a signal rather than being used in a creative way (for example, to create a special effect). Use the Low filter to remove: •...

  • Page 14: Using The Low And High Eq

    f u n c t i o n s – – Freq Freq High Eq Low Eq Off position: Set the gain control in the middle (click) position, so that it is neither boosting nor cutting frequencies. Using the Low and High Eq Low and High Eq are often used to correct problems with a signal: •...

  • Page 15: Using The Low Mid Eq And High Mid Eq

    e q u a l i s e r Controls • Freq sets the centre point of the affected frequencies. • dB sets the amount of attenuation or gain applied to the affected frequencies. • The Fine button sets the range of frequencies affected. Note that the Fine setting for the Low Mid Eq is narrower than the Fine setting for the High Mid Eq, for a tight bass sound.

  • Page 16: Gate/Expander

    f u n c t i o n s Gate/Expander A gate and an expander both serve to keep out unwanted noise. A gate does not allow any signal through until the volume of the signal passes a certain threshold, while an expander compresses the volume of any signal below a certain threshold.

  • Page 17: Key Button

    f u n c t i o n s Key Button When the Key button is out, the unmodified input audio signal to the unit is used to control the gate/expander. When the Key button is in, a different signal is used to control the gate/expander –...

  • Page 18: Compressor

    c o m p r e s s o r Compressor A compressor acts like an automatic volume control, turning down the volume of a signal if it gets too loud. It reduces changes in volume, automatically reducing the gain when the signal gets louder than a certain threshold, so that the dynamic range of a compressed signal is lower than the dynamic range of the input signal.
  • Page 19 f u n c t i o n s Controls Fast Make-up Ratio Threshold Release To Meter Comp In Auto Rel • The Comp In button switches the compressor in or out. • The To Meter button modifies what the meter displays, and how it displays it. When the switch is out, the meter acts as a VU meter displaying the level of the input signal.

  • Page 20: Ratio

    c o m p r e s s o r Threshold The threshold determines when the compressor starts to compress the signal. Threshold By setting a threshold, you do not compress all of Range the input signal – instead, you compress the signal only when it is louder than the threshold, as shown in the following diagram: Setting the Threshold...

  • Page 21: Attack And Release

    f u n c t i o n s Attack and Release Attack and release determine how quickly the compressor switches on and off at the threshold. With instant attack, full compression would be applied to the signal as soon as it got louder than the threshold. Similarly, with instant release, the compressor would switch off as soon as the signal got quieter than the threshold.

  • Page 22: Make-Up Gain

    c o m p r e s s o r The release rate is probably the most important variable when recording rock music, since it controls loudness. Loudness is determined by the maintenance of high mean levels: compression increases the proportion of high-level signal content, and as the diagram shows, the faster the unit releases, the more low-level signal is brought to a higher level.

  • Page 23: Using The Low And High Filters With The Compressor

    f u n c t i o n s Using the Low and High Filters with the Compressor If you use the To S/C switch in the equaliser section, the filters determine the frequencies that are sent to the compressor’s side chain, and so affect how the signal is compressed.

  • Page 24: When To Use Equalisation

    t e c h n i q u e s Another application of this technique is in de-essing. When de-essing, you want sibilants in a voice to be heavily compressed. To achieve this, set a high level of compression, but use the filters to remove frequencies that are not affected by sibilance (as a starting point, set the low filter at 2kHz and the high filter at 10kHz, and adjust accordingly).

  • Page 25: How To Use Equalisation

    f u n c t i o n s Use equalisation to: • Remove unwanted noise, such as rumble, bass lift and hum (by using the Low filter). • Reduce hiss (by using the High filter). • Replace missing bass or treble (by using the Low or High Eq). •...

  • Page 26: Bringing An Instrument Forward In The Mix

    t e c h n i q u e s Bringing an Instrument Forward in the Mix You can use equalisation to bring an instrument forward in the mix (that is, to make it easier to hear when mixed with the other instruments). However, when doing this, beware of using equalisation simply to make the instrument louder by boosting the fundamental frequency (the musical note).

  • Page 27: When To Use Compression

    f u n c t i o n s When to use Compression Compress hard: • To stop dropping in and out (particularly vocals – compress quite hard so they sit above the mix). • When recording bass (for example) – there is a lot of bass energy that can easily get out of control.

  • Page 28: When To Use Gating Or Expansion

    t e c h n i q u e s The release determines the level of the quietest signal. The combination of ratio, threshold and release determines the overall dynamic range. • If transients are not being compressed quickly enough, use the Fast switch to give a faster attack.

  • Page 29: Non-Operation

    t r o u b l e s h o o t i n g Non-Operation If the unit does not appear to be operating correctly, perform these simple checks before assuming that it needs repair. None of the LEDs light Check the mains supply: 1.

  • Page 30: Changing A Fuse

    t r o u b l e s h o o t i n g Changing a Fuse We strongly recommend that you do NOT attempt to change fuses unless you are absolutely certain that you know exactly what you are doing. If you are in any doubt whatsoever, contact your dealer or the factory before you open the module.

  • Page 31: Technical Spec

    t e c h n i c a l s p e c . THD dynamics out: 0.001% @ 20Hz to 20kHz THD dynamics in: 0.006% @ 1kHz 0.01% @ 10kHz (distortion is predominantly second harmonic) Clip level: +26dBu (output fader fully clockwise). Overload indication: +20dBu (output fader fully clockwise).

  • Page 32: Signal Flow Diagram

    c h a n n e l s t r i p Signal Flow Diagram of Green 5 Channel Strip...

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Green 5 channel strip

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