the Electronic Visualization Laboratory's
Portable Audio System Configuration

The following is a list of equipment that we use in the networked virtual reality systems at EVL.
For instructions on the configuration of the system see below.
 
 
Quantity
Model Number
Description
Function
Approximate Cost
1
Furman PL 8 Power conditioner Conditions the power to lower AC induced noise.  It also has cool lights, which provide a real benefit in dark demo  show floor rooms.
$135.00
1
Vega R22 Wireless Receiver Picks up the audio signals from the wireless body pack.
$750.00
1
Vega T25 Wireless Body pack Transmitter for the wireless microphone system
$460.00
1
MHHW5HH05-VS Countryman Headworn Microphone Hi quality microphone for voice.
$250.00
1
1402VLZ  Mackie Mixer Allows multiple inputs and outputs to be controlled.  We modify the board to allow for a pre-fader control of Aux 2 on the first 6 channels.
$ 423.00
1
TH-2 Lectrosonic Phone Interface Allows the phone lines to go in and out of the audio board.  It also has some echo cancellation.
$1,139.00
2
1029 A  Genelec Near Range Monitor Speakers to provide close in listening at extremely high quality
$535.00 each
2
Speaker Stands We use modified lighting stands.  There are other options, you should look at the omimount page.
1
PCC160 Crown Ambient Microphone Pick up audio from a wide area or for a large number of people when individual microphones are not possible
$266.00
1
C-747 Narrow Pick-up Cardioid Microphone This microphone is in the testing stages, but has a tighter pick up pattern than the PCC160.  This will allow for a better gain structure in remote systems.
$450.00
1
SKB 8 Space Flight Rack Provides a flight safe place to carry the equipment.
$150.00
1
Sliding Rack Shelf  Sliding Rack Shelf A shelf to mount the mixer on.  We bought ours from the local Guitar Center, I am not sure of the brand.  We use industrial velcro and a couple of screws to mount the mixer.
$55.00
 
Logical Diagram of the ImmersaDesk Audio system
 
Support of distant systems is an issue. Because of this we hava a structure to the inputs and outputs used on the Mackie Mixers. This has improved the conversations between untrained useres and people attempting to solve technical issues. The Audio Input Convention is:
 
INPUT Function
1 Wireless Microphone
2 Ambient Microphone
6 Phone or VAT Interface
7-8 Computer Sound \ Sound Server
OUTPUT Function
L & R Speakers Left and Right
Aux 1 Interface to computer for Dragon Dictate or moving mouths
Aux 2 Phone or VAT interface