Functions and Parameters:
Note that the titles of the functions do not always appear on the display, but most
of them are contained within the first parameter of that function. The following list
of functions are accessed in order by turning the FUNCTION knob clockwise.
The parameters are then accessed by turning the PARAM knob. The values
displayed are changed by turning the VALUE knob.
A) Mixer Function
1. OUTPUT LEVEL (OFF to +10 dB): Controls the output level
feeding all outputs from the unit. This is to allow the presets to be
set to nominally equal levels given different gains, compression,
EQ, and effects. It also allows adjustment to prevent clipping of the
4 channel output DAC. When the Function is turned to display this
or any parameter other than the titles, the LEVEL leds will display
the maximum output level of the 4 DAC channels. The OUTPUT
LEVEL can then be adjusted to prevent clipping of the DAC by
keeping the red 0 dB LED from lighting.
2. DIRECT PAN (0 to 100): Pans the direct signal (the signal before
the stereo effects) from Left (0) to Right (100). The primary use for
this is to have the direct sent to one channel and the delay sent to
the other.
3. BOOST (OFF or ON): When ON, boosts the level of the signal
after the Preamp.
4. BOOST LEVEL (0 to 10 dB): Adjusts the amount of BOOST. Note
that if the preset already has a hot level, too much boost can clip
the output DACs.
B) PREAMP Function
1. PREAMP (CLEAN or DISTORT): In CLEAN, the distortion part of
the preamp is bypassed, so the DIST TYPE, GAIN, and SAG
parameters have no effect, and it is not possible to get clipping
within the preamp section, due to floating point processing. If you
are still hearing distortion, it is probably due to the input ADC or
output DACs being overdriven, or your guitar, amp, mixer,
speakers, headphones, or ears. In DISTORT, the distortion part of
the preamp is enabled, so all the parameters become active.
2. DIST TYPE (THETA or VINTAGE): THETA type applies an EQ
curve before the clipper stage that matches that of the ISP THETA
pedal. This is in addition to the settings of the PRE EQ controls.
VINTAGE removes this curve, so that the only pre-distort EQ is
what has been set on the PRE EQ controls. Real vintage amps do
not have much pre-clip EQ, but sound less desirable at high gain
settings.