Operation Manual

6.92 Tube Reverb 151
• termination: specifies whether the final tube is open or closed at its extremity. A value of 0
indicates that the tube is closed and a value of 1 that it is open.
Note: For more details on the filtering effect of tubes see the Tube module.
6.92 Tube Reverb
The reverb effect obtained with this module is obtained with an assemblage of
three tubes. The tubes are assumed to be connected at one of their extremities and
the sound source to be located at this connection point. Each tube of the array filters
the source according to its resonance frequencies, but, since the three are connected
together, the output of each tube is also distributed to the other tubes which results
in interesting reverb effects. This module has one input, the source signal, and its
one output is the signal that would be measured by a microphone located at the tube
connection point.
mic position
source position
l2
l3
l1
2r1
2r2
2r3
Figure 93: A reverb made out with three tubes.
Tuning the reverb
The reverberation effect obtained with the module can be tuned by adjusting the lengths and radii
of the different tubes. The longer the tube, the longer the reflection time and the smaller the radii,
the lower the absorption. Small radii will also increase the amount of high frequencies in the sound.
As a rule of the thumb, use tubes having a length similar to the size of the room or space you are
imagining.