Manual AAS Lounge Lizard EP-4 (page 40 of 55) (English)

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40 Parameters

Direct Sound Room Response

Early reflexions Late Reverberation

Reverberation Time (TR)

Amp

Time

Figure 21: Impulse response of a room.

The duration of the reverberation time depends on both the size of the room and the absorption

of the walls, which is controlled with the Decay knob. In a real room the reverberation time is not

constant over the whole frequency range. As the walls are often more absorbent in the very low and

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. Note that

the Mix parameter is also adjustable from the Play view.

5.4 The Play View

The Play view groups together the main parameters from the Edit and FX views. It is loaded when

starting the instrument and can be accessed from another view by clicking on the Play button on

the top part of the interface.

The middle section of this view allows one to switch on and off the EQ, Compressor and

i dont have a serial number or challenge code how do i get mine to authorize Submitted on 18-1-2023 at 12:41
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AAS Lounge Lizard EP-4 Manual

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