Teac GigaStudio 3 - Manual (Page 268)

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Perspective:
Adjust the relative perspective of all the Mic Groups. The nominal setting (zero) is the
exact point where the impulse response was sampled. By moving the slider, you are ap-
plying an envelope to the IR and changing it in real time as you move the slider control.
Another way to describe perspective is that it is like getting closer (tighter) to the
sound source or further away (looser) except for the timing aspect of mic placement.
You get the net effect of more direct signal and less reverberation, or just the opposite,
depending on the positive or negative setting.
Using the perspective, you can control the closeness of the mic placement without
affecting the timing (phase alignment) of the source the signal.
Wet/Dry Mix:
Adjust the ratio (balance) of wet versus dry signal for all the Mic Groups. Most often,
a convolved room should be used with a 100% wet mix. Most signal processor equip-
ment emulations should be set to 50/50% mix.
Pre-Delay:
Adjust in the negative direction up to 64 samples, in order to compensate for latency
introduced in the IR. In aligning multiple mic positions for phase alignment.
Here is an an application example utilizing Pre-Delay:
With a snare signal (center panned) adjust the pre-delay in the Front Mic Group
right (Front R) in the positive direction (adding delay). This will enhance the phenom-
enon of the snare placement as being pulled to the left of the stereo field.
If this were a real world application, you would probably want to increase the
amount of perspective (perceived distance) which will increase its overall level. You can
then compensate by bringing its level down a bit.
The “Placement Selection” graphic display shows the places where the actual IRs
were taken with the number of available mics. IR placements are represented by their
numbered rectangular buttons. An unlimited number of recommended placement lo-
cations are available. Some of our examples have only two to eighteen placements.
If 18 placements are not enough, or there is a need to place a source either in-be-
tween, beyond, or in front of the available IR placements, then the Perspective and Pre-
Delay controls can help to achieve the desired virtual placement within the selected
environment. Mics are represented by round buttons and labeled with their intended
stereo or surround field placement.