Signal's Path Diagram; Preset Selection; Preset Programming - G-Lab MIDI Guitar Controller User Manual

Signal's path diagram

Guitar signal, thru very high impedance (>10 MΩ) tuner buffer and separating transformer, is transmitted to
TUNER output. It enables using of the tuner during playing.
Controller features a switchable (by relay), true bypass input buffer circuit. Buffer which's input impedance is
consistent with tube amps boost the guitar signal power (without the voltage gain).
Adding the buffer between the guitar and the effect can improve guitar sound (due to their low input
impedance many of the effects change the guitar tone) and in case of using long cables (between the
controller and the amp) it enables to avoid high tones loss caused by cables' parasitic capacitance appearing
when all the effects are switched off.
SEND outputs should be connected with IN effects inputs and RETURN inputs should be connected with
OUTPUTs of particular effects. MUTE block tunes out the signal during the silent tuning.

Preset selection

Controller enables saving a 100 of presets with numbers from 1 to 100 displayed as P01 to P00 (for preset
No 100). Recalling of the presets can be done by:
– MIDI foot controller by sending Program Change command
– UP, DOWN buttons (by single pressing or pressing and holding)
– by entering the preset number

Preset programming

Preset is defined by:
– switched on effects (connected to LOOP1 to LOOP6) and switched on or off buffer,
– amp's setting controlled by SW1 to SW4 outputs;
– AUX 1 to AUX 8 outputs' state
– MIDI Program Change numbers (and Control Change command) transmitted to MIDI devices.
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