267e

Uncertainty Source / Dual Filter

Buchla · 1 slot · Buchla, 7 inches

UNCERTAINTY
SOURCE
MODEL
267e
BUCHLA & ASSOCIATES
BERKELEY
CALIFORNIA
NOISE SOURCE OUTPUTS
RANDOM A
RANDOM B
FILTER A
FILTER B
DUAL BANDPASS FILTER
low
-3db
/oct
flat
0db
/oct
high
+3db
/oct
rem
enable
prob chnge rate
external c.v.
random
mix
out
s&h
out
prob chnge rate
external c.v.
random
mix
out
s&h
out
smpl
sample
flat
noise
modulation index
sig
in
freq
b.w.
mod
in
sig
out
amp
freqncy
bandwidth
mod
type
modulation index
sig
in
freq
b.w.
mod
in
sig
out
amp
freqncy
bandwidth
mod
type
.05
.1
.2
.5
1
2
5
10
20
50
.05
.1
.2
.5
1
2
5
10
20
50
31
62
125
250
500
1k
2k
4k
31
62
125
250
500
1k
2k
4k
0
1
0
1
0
1
0
1
N
N

Panel · 108 × 177.8 mm

Description

Buchla's 267e Uncertainty Source / Dual Filter, a 200e series module: three noise sources, two random voltage sources and a two-channel bandpass filter.

Key features

  • Three noise outputs: low (-3 dB/octave), flat (0 dB/octave, on two sockets) and high (+3 dB/octave)
  • Two random voltage sources, their probable change rate from .05 to 50 Hz under voltage control, sampled by pulses, their external c.v. randomized as set by the random knob, mix and s&h outputs
  • Two bandpass filters with voltage control of frequency (31 Hz to 4 kHz), bandwidth and modulation index, their modulation type (amplitude, frequency or bandwidth) on a button and three lamps
  • The filters' inputs normalled to the flat noise

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