Wiardgroup

> Lights have a purpose, just as knobs and switches have a 
purpose.  If 
> the idea of LEDs is to entertain moreso than inform, then what 
you 
> have is a toy or mere stage dressing.  Why not go all the way 
and add 
> spinning disks, glowing red dials, Jacob's ladders and other 
gewgaws?

You mean like the LED Barber Poles on the new Buchla 200 
modules?

> Maybe it's just me, but I think signal generation and processing 
> equipment that aspires to be professional should look the part.  
As 
> such, it should be characterized by a functional and *dignified* 
> exterior.

That is exactly what I was trying to do. Sorry you don't like it. Does 
a violin look unprofessional because it has scrollwork?

As far as the LEDs go:

All are Fairchild HMPL series except Woggle Bug that use 
Panasonic "Jellybean" LEDs. The Woggle Bug LEDs replicate 
the incandescent indicators on the Buchla 265 "Source of 
Uncertainty".

For the other modules they are organized in general categories 
by color. This comes from the slider coding on the ARP 
Odessey, but with different colors.

Bicolor LEDs (Off = white near 0 volts, Green = positive 
excursions Red = negative excursions) used on LFOs and 
bipolar modulation sources. Different waveforms are shown for 
phase reference.

Blue LEDs are used on each filter to show status.
Omni-Filter: Mode Lowpass, Bandpass, Highpass, Allpass
Borg Filter: In series with Vactrol LED shows filter envelope by 
brightness.

Red LEDs are used to show sequential states like sequencer 
step, or overload conditions in the VCAs.

Linear Yellow LED dot mode bargraph voltmeters used on 
evelopes. The envelope indicator on the Classic VCO has been 
changed to yellow.
Off = less than 2 volts
2 volt LED lights from 2-4 volts
4 volt LED lights from 4-6 volts
6 volt LED lights from 6-8 volts
8 volt LED lights for 8 volts and above at output

Exponential VU Meters used on each VCA and Omni-Filter.
Bargraph in bar mode.
Green -10 dBv (0.3 volts peak)
Green 0 dBv (1 volt peak)
Amber +10 dBv (3.34 volts peak)
Red +20 dBv (above 10 volts peak)

Waveform City uses 4 LEDs to show 16 knob positions
Weighted 8-4-2-1
Green for Waveform selection
Amber for Bank selection