The A-171-2 is a multi-functional module for generating and processing control voltages and audio signals in the manner of a function generator. LFO, envelope generator, slew limiter... plenty functions are possible! You can even use the module as a simple waveshaper or a filter. The A-171-2 has been created in licence from Ken Stone.

These are the most important features:

• Manual control of the Slew-Up time
• CV control of the Slew-Up time with polarizer
• Switch for linear/exponential shape of the rising section of the response curve 
• Manual control of the Slew-Down time
• CV control of the Slew-Down time with polarizer
• Switch for linear/exponential shape of the falling section of the response curve
• Signal input: the "to-be-slewed" signal
• CV Up Input, affected by the CV Up Control and the corresponding exp./lin. switch
• CV Down Input, affected by the CV Down Control and the corresponding exp./lin. switch 
• CV Up and CV Down sockets are normalled
• exponential CV input: named "V/Oct" in the original design but as it's not really exactly 1V/Oct we will name this input probably "exp.CV", mainly used for VCLFO/VCO applications in cycle mode or as common exponential control for both up and down times in slew mode 
• Trigger input: used for envelope generation or retrigger in VCLFO/VCO mode, a pulse at the trigger input will start the envelope or retrigger the VCLFO/VCO
• End output: turns high as the output falls below about 20mV, turns low as the outputs goes beyond about 3.5V, in cycle mode a rectangle signal is generated
• Cycle on/off switch: when "on" the End output is internally connected to the Trigger Input to generate cyclic signals like an VCLFO/VCO
• Output: the signal output of the module
• LED display: displays the slew limiter output signal