Mic/Instr. Input; Connecting Signal Sources; Gain - MINDPRINT TRIO Handbuch

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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 micro-
phones. 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 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
1.2 HF
Twist this knob to adjust the amount of treble in the signal.
Characteristic: Chebyshev type high shelving filter
(Vintage dip-before-boost design)
Corner frequency: 7.5 kHz
Control range: +/- 12 dB
1.3 LF
Twist this knob to adjust the amount of bass frequencies in
the signal.
Characteristic: Chebyshev type low shelving filter
Corner frequency: 100 Hz
Control range: +/- 12 dB
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THE ONBOARD CHANNEL STRIP
The MIC/INSTR. input is more than merely a preamp circuit.
It comprises 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 instrument's pickups or degra-
de their sound. The technology 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 performance unusable. So,
proceed judiciously, dialing in settings so that signals 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 signals 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
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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.
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