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UTL2 – Output Mix

The UTL2 is a simple three channel mono audio mixer designed primarily to act as the system output 
stage.

The input channels are DC-coupled and have independent audio-taper level controls, summing the 
signals before two outputs. 

Out1 is a DC-coupled full-amplitude (ie. It does not pass through the Master Level control) mix of inputs 
on banana, switchable between positive and inverted phases - useful for feeding signals back through 
the system. 

Out2 passes through a master level control before output on Mono 1/4” Jack. 

On the rear PCB are two jumpers which affect the Out2 jack output:
The 

Atten

 jumper selects  either full level output or attenuates by a factor of 5 for lower level output, for 

example when using a sensitive input on an amplifier. Set at full level as standard.
The 

Coupling

 jumper selects either AC or DC coupling for the Out2 output socket. Set as AC coupled as 

standard. 

Summary of Contents for 1Frame SynthVoice

Page 1: ...g the lines of traditional subtractive synthesis VCO VCF VCA The patchable modular approach not only gives great scope and versatility around such areas but also opens up many more esoteric arenas for...

Page 2: ...ity of connections 1 4 Jack Sockets are employed for Input Output from the system these provide the required ground connection that is not present when solely using banana plugs Black banana sockets a...

Page 3: ...tract from the setting given by the Master control a 0 10v signal will add to the setting given by the Master control Consider a VCA mplifier which is swept from fully closed at one extreme to fully o...

Page 4: ...nect external CV Gate signals either via the jack to banana connectors on the Mini Power or via custom interface cables Note that due to the signal amplitudes within the system most audio signals will...

Page 5: ...attenuated and fully right the signal passes non inverted with unity gain INTERNAL UNIPOLAR The joystick generates a DC output voltage rising from zero volts at fully left to 10 volts at fully right...

Page 6: ...es or other waveforms can be used eg Try feeding a VCO waveform into the Gate input The End Out socket provides a means to chain sequential events the output is High 10v when inactive and goes Low 0v...

Page 7: ...ck to the FM CV input and adjust Linear FM depth to suit Using different phase outputs as the self FM signal will give different end results ramp waves or parabolas A quasi noise source can be achieve...

Page 8: ...mixes an inverted signal while in the centre position no signal is passed This proves an extremely useful module for mixing both audio and or control signals the operation is basically the same as for...

Page 9: ...om zero output with the Folds dial fully counter clockwise and with the first little turning of the Folds dial or external CV the response is exactly like a regular VCA But the interest comes when the...

Page 10: ...Resonance also has main dial plus CV modulation with depth control Note that such filters do not offer self oscillation resonance but interesting areas can be achieved through patching check otoskope...

Page 11: ...the CTL2 Joystick to achieve this The Amplitude Modulation AM mode can be thought of as a little bonus it does not behave as a true VCA in that it doesn t take the signal down to zero but gives a very...

Page 12: ...banana switchable between positive and inverted phases useful for feeding signals back through the system Out2 passes through a master level control before output on Mono 1 4 Jack On the rear PCB are...

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