User's Manual

5.4 The Effects Section 63
in the high frequencies the reverberation time is shorter for these frequencies. These parameters
are adjusted with the Low and High knobs respectively.
Another parameter which affects the response of a room is its geometry; the more complex
the geometry of a room, the more reflexion are observed per unit of time. This quantity is known
as the time density and can be set trough the Diffusion knob. In a concert hall, the time density
is supposed to be quite high in order not to hear separate echoes which are characteristic of poor
sounding rooms. The last parameter which affects our listening experience in a room, is the distance
between the sound source and the listener. While the room response is quite constant regardless of
the position of the source and the listener, the direct sound (the sound which comes directly from
the source) depends strongly on the position of the listener. The farther we are from the sound
source the quieter is the direct sound relatively to the room response. The ratio between the direct
sound and the room response is adjusted with the Mix knob which in other words is used to adjust
the perceived distance between the source and the listener. In its leftmost position, only the direct
sound is heard while when fully turned to the right, one only hears the room response.
5.4.13 Studio Mix
The Studio knob on the right of the multi-effects module is used to add a subtle reverb effect to the
sound. The reverb preset used for this effect can not be modified and is completely independent
from the other reverb effect adjusted with the other parameters of the Reverb module. This knob
reverb is always active, even when the Reverb module is turned off. The Studio knob is a mix knob
which allows one to adjust the amount of wet and dry components in the signal. In its leftmost
position, there is only dry signal in the output while in its rightmost position one only hears the
input signal processed through this reverb preset. In its center position, there is an equal amount of
dry and wet signal in the output.
5.4.14 Output Gain
In order to ensure a proper gain staging, the output level of the Effects section, in other words the
post-effects signal level, around 0 dBr when playing a musical phrase mezzo forte (moderately
loud), assuming of course that the pre-effects level is also correctly adjusted. It should be possible
to achieve this using the different gains of the different effects modules. An extra gain parameter
is provided in case this proves to be difficult to achieve. This gain is controlled using the Output
knob located on the right of the Reverb module.
A coloured LED located just above the Output knob gives an indication of the level at this point
in the signal flow. This LED is turns to light green when the signal is in the 0 to +6 dBr zone. It
will turn to yellow and then red as the output level increases.