Owner's manual
16 | External Control
EXTERNAL CONTROL
One of the new Core Features of the Soundblox 2 line of effects pedals 
is the addition of the Multi-Function Input. The Multi-Function input is 
an intelligent control input that can accept both digital and analog control 
signals. The Multi-Function input replaces the Sensor Input on previous 
Soundblox pedals. The Multi-Function input can connect to wired 
or wireless Hot Hand accessories, a Source Audio Expression Pedal, or 
a future Source Audio MIDI interface that will enable full MIDI I/O access 
to the pedal.
Selecting an external control input: 
Press the NOISE GATE button while pressing and holding the TONE 
SHAPE button until the LO/(EXP) LED is lit red. This will change the func-
tion of the NOISE GATE button. Now press the NOISE GATE button again 
to select between the control options. The options are indicated in white 
text below the gate level labels. There are four possible settings:
  • OFF (no LEDs on): External control is disabled in this mode
  • EXP: Expression Pedal for use with the SA161 Source Audio Dual 
Expression Pedal. By default, the expression pedal will control the 
Morph (see the Morphing section for details). The expression pedal 
can also be assigned to control an individual knob parameter.
   • MIDI: MIDI control mode. Select to enable MIDI I/O through the 
Soundblox 2 MIDI Interface
  • HH: Hot Hand mode. Select to enable Hot Hand control. By 
default, Hot Hand will be assigned to control the morph param-
eter. Alternatively, Hot hand can also be also be assigned to 
control an individual knob parameter.










