Mutable Instruments Streams - Manual (Page 2)

About Streams
Streams is a dual-channel toolbox for shaping the am-
plitude and brightness of audio signals or CVs.
Each channel consists of a VCA and a VCF. The control
voltages for these two analog circuits are digitally gen-
erated, by “reacting to,” “following” or “listening to” a
multi-purpose input called EXCITE. There are 4 different
ways in which the module can adjust its gain and cutoff
frequency in response to the excitation signal: envelope
generation, Vactrol emulation, signal following, and
dynamic compression.
Additionally, the VCA gain can be directly controlled by a
CV - independently of the digital control path.
A
B
2 1
3 4
D
C
F
E
digital CV generator
analog VCA analog VCF
Level mod attenuator
Level
CV in
Signal
input
Excite
input
Shape control and modulation amount
Output
Exp/lin control
Installation
Streams requires a -12V / +12V power supply (2x5 pin
connector). The red stripe of the ribbon cable (-12V side)
must be oriented on the same side as the “Red stripe”
marking on the board. The module draws 30mA from the
-12V rail and 100mA from the +12V rail.
Online manual and help
The full manual can be found online at
mutable-instruments.net/modules/streams/manual
For help and discussions, head to
mutable-instruments.net/forum
Front panel
Inputs and Outputs
1. Multi-purpose excitation input.
2. DC-coupled signal input, normalized to a constant
+5V offset.
3. Unipolar VCA CV input, normalized to a constant +8V
offset. Unity gain is achieved with a voltage equal to +5V.
4. DC-coupled signal output.
4
1
2
3
Controls
A. B. Digital CV generator parameters.
SHAPE controls how fast the module adjusts amplitude
and brightness in reaction to the excitation signal. MOD
controls the amount and range of VCF modulation.
These knobs also control compression threshold and
ratio when the dynamic compressor mode is used. More
details are provided in the next pages.
C. Level CV input attenuator.
D. Function selector. Cycles through the four functions.
E. VCA response curve, from exponential to linear.
F. Metering button. Press to display the bargraph. Press
again to select which signal is to be monitored.
Audio signals are metered with a dB scale of 6dB/LED.
Slow CVs are displayed with a linear scale of 2V/LED -
the LED color indicates signal polarity.
METER
EXCITE
METER
LEVEL
METER
IN
METER
VCA OUT