Make Noise soundhack ECHOPHON, Manual

Using the External Feedback Loop:  

Patch the FB OUT (2B) to an external module such as the modDemix. Set up the external module to process 

the FB OUT signal. For the modDemix you could set up the typical Ring Modulation patch where you have a 

sine or triangle waveform from a VCO patched to the CARRIER input on the modDemix. The FB OUT signal 

would be patched to the Signal IN on the modDemix. Take modDemix Signal OUT and patch to the final 

stage in the external feedback loop, the VCA. The Optomix works nicely as the final VCA stage in an external 

feedback loop patch. Patch the Signal OUT from the modDemix to the Signal IN on the Optomix. Take the 

Signal OUT from the Optomix to the FB IN (1B) on the ECHOPHON.  Set the Optomix CONTROL Level to 

determine the amount of regenerations.  

Other modules could be placed in the loop to create more complex sounds, but it is important to have a 

VCA (or manual attenuator) at the end of the loop for gain control. Without this final gain control stage, the 

external feedback loop might be hard to tame and utilize in a musical way.  

CLOCK Division/ Multiple:  While a Master Clock is patched to the TEMPO IN, the ECHO Time control acts to 

multiply or divide the Master Clock. Below is a list of the possible ratios:  

  ECHO Time <50% 1/16, 3/32, 1/8, 3/16, 1/4. 3/8, 1/2, 3/4,   

  ECHO Time 50% = 1/1  

  ECHO Time >50% = 3/2. 2/1, 3/1, 4/1, 6/1, 8/1, 12/1  

The slowest clock (input or output) is limited to the delay time, so to get a 12/1 out, you need a fairly fast 

clock in (1.7s/12 or .15s).  

TIP & TRICKS: 

-The Signal IN is optimized for 10Vpp signals; however, it is possible to create much more powerful signals 

within the euro system, so use the Level Control to achieve clean sounds.  

-Patch a VCA or attenuator in front of the FB IN.  

-Use FB IN for a secret sound that will occur only as an echo repeat.  

-Use FB OUT to skip the pitch shifting machine.

-Modulate DEPTH to create Harmonic sequences. 

-To achieve pitch-shifting, DEPTH must be set to greater than 10%   

-Subtle PITCH Shifts (low DEPTH setting)  

-To sequence full range of PITCH, set PITCH Panel Control to FULL CCW and patch sequencer CV to PITCH 2.

-When the delay time is below 20 milliseconds, the delay is acting like a comb filter. FEEDBACK will affect the 

harmonics being emphasized.  

-The slowest CLOCK OUT is limited to the delay time, so to get a 12/1 out, you need a fairly fast clock (1.7s/12 

or .15s) patched to TEMPO IN.