Handleiding Focusrite VoiceMaster Pro (pagina 5 van 88) (Duits, Engels, Frans, Italiaans, Spaans)

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ENGLISH

FACILITIES AND CONTROLS

POWER (switch) - Turns the unit on. We recommend that the unit be powered

up before connecting to any equipment that it is feeding, to avoid clicks or thumps

which may harm output devices. It is also a good idea to allow the unit to stabilise for

a couple of minutes before use to ensure that the internal circuitry is properly

initialised.

DISCRETE CLASS A PRE-AMP

This part of the unit is a pre-amplifier, used to amplify the incoming signal being fed

to the MIC INPUT or INSTRUMENT INPUT to a suitable level before any further

processing is applied.

MIC INPUT - This is an XLR connector that allows you to connect a microphone

to the unit. There is also a MIC INPUT XLR on the rear panel, but only one may be

used at a time; do not connect both MIC INPUTs simultaneously. If using the

VoiceMaster Pro’s mic pre and feeding the output into a mixing console, bypass the

console’s own mic pre and connect to the channel’s line input. This will mean the

superior VoiceMaster Pro mic pre is used to route signal to its destination, e.g. a

recording device, avoiding unwanted distortion and colouration from an inferior mic

pre. Always avoid routing the VoiceMaster Pro’s mic pre into a second mic pre, as this

will produce greatly inferior results.

+48V (switch) - This provides +48V of phantom power for condenser

microphones (affecting the MIC INPUT only.) If you are unsure whether your

microphone requires phantom power, refer to its user guide before connecting, as it is

possible to damage some microphones (most notably ribbon microphones) by

providing them with phantom power.

INSTRUMENT INPUT - This is a high impedance 1/4" jack input that allows

you to connect an electric guitar or bass guitar to the unit without loading the pickups,

and without the need for a DI box. If both the mic and instrument inputs are

connected, the instrument input will override the mic input.

Ø (Phase Reverse switch) - This allows the phase of the input signal to be

reversed e.g. to correct phase problems when incorrect wiring polarity has occurred.

LINE (switch) - When engaged (in), this switch selects the rear panel LINE

INPUT, and an LED is illuminated in the switch cap to indicate that the LINE

INPUT is active. If this is disengaged (out), the MIC INPUT and INSTRUMENT

INPUT are active.

(HPF knob and switch) - This is a high-pass filter, which removes

unwanted low frequencies such as stage rumble via microphone stands, or 'proximity

effect' (where low frequencies are over-emphasised when using certain types of

microphone at close range). The knob sets the cut-off frequency (from 30 to 400 Hz,

18 dB per octave), and the switch must be engaged (in) for the control to function.

INPUT GAIN (knob) - This is used to set the optimum input signal level.

Connect an input signal to the unit, ensuring that the INPUT GAIN control is set

fully counter-clockwise, and increase the INPUT GAIN control whilst observing the

LED signal meter. The red O/L (overload) LED may light occasionally, but only if the

input signal gets particularly loud. If the O/L LED stays on continuously for any

period, or you hear the unit distort during loud peaks, you should reduce the INPUT

GAIN.

Note that the meter is calibrated to read 0 dBfs at the top of the meter- this has been

set up to enable simple metering when recording to digital media. The best level to set

for recording depends on your recording medium. If recording to an analogue

medium like tape, where extra headroom is required, a level of –18 dBfs will give a

suitable +4 dBu equivalent output. If recording to digital media, you may wish to

record at a higher level, peaking at e.g. –4 to –6 dBfs. Confused? Visit

www.sospubs.co.uk/sos/may00/articles/digital.htm for further illumination.

With the MIC INPUT selected, the INPUT GAIN control provides 0 dB (fully

counter-clockwise) to +60 dB (fully clockwise) of gain. With the INSTRUMENT

INPUT selected, the INPUT GAIN control provides +4 dB to +34 dB of gain. With

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