APPLIED ACOUSTICS SYSTEMS STRINGSTUDIO Manual de usuario descargar pdf (Pagina 40)

40 Parameters

The attenuation or gain reduction level meter, located in the middle of the module, indicates

the amount of compression applied by the module. It is the difference between the input and output

signals of the module before makeup gain is applied.

4.3.3 Delay

The Delay module consists in a stereo feedback loop with a variable delay in the feedback. It is

used to produce an echo effect when the delay time is long (greater than 100 ms) or to color the

sound when the delay time is short (smaller than 100 ms).

The Delay knob is used to adjust the amount of delay, in seconds, introduced by the effect.

Turning this knob clockwise increases the delay. The Feedback parameter is a gain factor, varying

in the range between 0 and 1, applied to the signal at the end of the delay lines. It controls the

amount of signal that is re-injected in the feedback loop. In its leftmost position, the value of this

parameter is 0 and no signal is re-introduced in the delay line which means that the signal is only

delayed once. Turning the knob clockwise increases the amount of signal re-injected at the end of

the feedback loop and therefore allows one to control the duration of the echo for a given delay

time. In its rightmost position, the gain coefﬁcient is equal to 1 which means that all the signal is

re-injected into the feedback loop and that the echo will not stop. In addition to this gain factor,

low pass ﬁltering can also be applied to the signal re-injected into the feedback loop. The cutoff

frequency of this ﬁlter is controlled using the Cutoff knob.

The Pan knob is used to balance the input signal between the left and right channels. In its

leftmost position, signal is only fed into the left delay line and one hears clearly deﬁned echo

ﬁrst from the left channel and then from the right channel and so on. In its rightmost position,

the behavior is similar but with the ﬁrst echo coming from the right channel. These two extreme

position correspond to the standard ping pong effect but a a less extreme behavior can be obtained

by choosing an intermediate position. In particular when the Pan knob is in its center position, an

equal amount of signal is sent in both channels.

The output signal from the Delay module can include a mix of input signal (dry) and delayed

signal (wet). The Wet and Dry knobs are used to adjust the amplitude of each component in the

ﬁnal output. The amplitude of each component is increased by turning the corresponding knob

clockwise from no signal to an amplitude of +6dB. Note that the Wet parameter is also adjustable

from the Play view.

4.3.4 Distortion

The Multi-Effect module includes three different types of distortion which are selected using the

Shape selector knob. The Warm Tube effect applies a smooth symmetrical wave shaping to the

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APPLIED ACOUSTICS SYSTEMS STRINGSTUDIO Manual de usuario Pagina 40