Merlin Integrated Signal Processor ISP-100, User Manual

Page: 94 / 146

8-24
10 July 1998
Cut
Figure 8-11 Cut component.
The Cut (see Figure 8-11) can apply as much as 96 dB attenuation, or
mute completely, and invert polarity.
Attenuation and Polarity
Application of attenuation is accomplished by multiplying each data
sample by a number whose absolute value lies between 1.0 (0 dB)
and 0.000015625 (-96 dB). Muting is accomplished by multiplying
each sample by zero. Polarity inversion is accomplished by
multiplying by a negative number. All gain and polarity changes are
soft, meaning that they are gradually changed from the old setting to
the new in order to help prevent the occurrence of clicks or pops.
Bypass
Bypassing cut is equivalent to setting its attenuation to 0 dB and its
polarity to + (in-phase). Bypassing a muted attenuator un-mutes it.
Attenuator
The attenuator can be set three ways:
Using the Knob
Click on the indicator on the knob and while continuing to hold
down the mouse button, move the mouse in an arc. The
numbers in the box below the knob will change. When the
desired level is reached, release the mouse button.
Using the Text Box
Click in the box. Using the Back Space and/or Delete keys
erases the current entry and enters the new level. Be sure to
press the Enter key after the entry is made. Clicking outside the
text box without pressing the Enter key will cause the setting to
return to the number that it was before a change was attempted.
Alternatively, click and drag across the number in the box to
highlight the number in it. Type the new setting and press the
Enter key when finished.
Using the UP/DOWN Arrows
To increase the level, click on the up arrow. To decrease the
level attenuation, click on the down arrow. The amount of
increase or decrease is controlled by the fine/coarse control.