MINDPRINT T.R.I.O., Руководство пользователя

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8
MindPrint
®
T.R.I.O.
1. MIC/INSTR. Input
Connecting signal sources:
Located on the T.R.I.O™’s rear panel is an XLR port designed
to accept a microphone. It is wired in compliance with the
international standard (pin 2 = hot). Switchable 48-volt
phantom power is available for condenser microphones.
T.R.I.O™ also offers a switchable low-cut filter for suppressing low-
frequency noise.
Connect instruments such as guitar/bass to the INSTRUMENT
IN jack. When you plug a mono 6.3 mm (1/4") plug into the
high-impedance instrument input, T.R.I.O™ automatically
enables this port, and it has priority over the microphone
input.
The microphone/instrument input takes a mono signal. A dip switch on the
bottom panel of the device lets you determine whether this signal is routed
to the left recording and monitoring channel only or distributed evenly to
both channels. See 10.1. to learn more.
Handling:
1.1 48 V
Switches on +48V phantom power for the microphone input.
This buttons’ yellow LED lights up when power is activated.
Power is fed to the XLR port labeled MIC Input.
1.2 LOW CUT
Inserts a high-pass filter into the signal path; a yellow LED
indicates the given switching status. LOW CUT is located
directly behind the input stage in the signal path Linkwitz-
Riley characteristic 80Hz center frequency; 12dB/oct slope
1.3 GAIN
This knob controls the amount of increase in microphones’
and instruments’ audio signal strength. Use this knob to
adjust the level for the microphone/instrument patched into
the T.R.I.O™’s channel strip.
Control range for microphones: -56 dB to +4 dB
Control range for instruments: -40 dB to +14 dB
THE ONBOARD CHANNEL STRIP
The MIC/INSTR. input is more than merely a preamp circuit. It compri-
ses a full-fledged mixer channel strip offering hip features like low cut,
EQ and a compressor. It lets you process the frequencies and dynamics
of a signal before recording it.
x
Switch phantom power on only for microphones that require it.
Never feed power to unbalanced and ribbon microphones! Do not
connect line level devices to the microphone input - this can damage
T.R.I.O™.
g
The microphone input is automatically disabled when a plug is
inserted into the INSTRUMENT IN jack. This means that for the sake
of convenience, you can opt to leave a microphone cord connected
to MIC input.
INPUT SENSITIVITY
Designed to handle instrument levels, the instrument input accepts
guitar and bass signals directly. With an impedance of 1 M-ohm, it
does not load instruments’ pickups or degrade their sound. The tech-
nology that powers this input comes courtesy of MindPrint®s‘ sister
company Hughes & Kettner®, whose guitar amp know-how we have
to thank for this input’s top-drawer audio quality.
PREAMPLIFICATION
Because the T.R.I.O™’s GAIN knob has such a formative impact on
incoming signals, it’s a good idea to be very fussy about setting its
level. If the input level is too high, the signal may distort audibly. This
kind of saturation is more than annoying – it can render a great perfor-
mance unusable. So, proceed judiciously, dialing in settings so that sig-
nals peaks never (or rarely and then only briefly) trigger the red LED.
REFRESHING SIGNALS
Most microphones tend to deliver fairly dark signals. You can make sig-
nals such as vocals more articulate by boosting high frequencies. The
MIC/INSTR. Channel’s HF EQ is similar in design to the circuitry found
in coveted analog high-end equalizers. Its Chebyshev-type filtering was
borrowed from the MindPrint® DTC: High mids are scooped slightly
before treble frequencies are boosted. This adds a silken sheen to
vocals while suppressing hissy-sounding sibilants. The LF band of the
MIC/INSTR. EQ also features Chebyshev filtering.