A-140-2 Dual Micro ADSR
Module A-140-2 contains two ADSR type envelope generators behind a front panel with 8 HP only.
Changing the positions of the mentioned jumpers allows to modify the factory settings. The following document shows the positions and functions of the jumpers of the module: A140_2_Jumper.pdf
The basic functions of an ADSR envelope is described in the user's manual of module A-140: A140_man.pdf.
The voltage control of envelope parameters is mentioned in the user's manual of module A-141: A141_man.pdf. But the A-140-2 has only one control voltage input CVT with attenuator available and one has to decide via the jumpers which parameters are controlled by CVT and into which direction.
Additional technical information:
The voltage level of the used gate signal has to be at least +5V and the rising/falling slopes has to be fast enough. Otherwise the envelope will be not work in the right way. We discovered that some modules from other manufacturers do not meet these specifications. In this case the level shifter module A-183-4 may help by connecting one unit of the the module between the gate source and the gate input of the A-140-2.
Each ADSR provides these controls and in/outputs:
- LED (displays the envelope output)
- A: manual Attack control
- D: manual Decay control
- S: manual Sustain control
- R: manual Release control
- Gate Input
- Retrigger Input
- CVT Input with attenuator (CVT = CV Time)
- Envelope Output 1
- Envelope Output 2
By means of internal jumpers one can select which parameter(s) are controlled by the CVT input (e.g. D only or D+R or A+D+R) and in which direction (i.e. if an increasing CVT shortens or stretches the time parameter in question). By means of another jumpers output 2 can be set to normal or inverted envelope. Two more jumpers are used for the optional bus access to the gate signal of the bus for each ADSR.
The output voltage range for each envelope is 0 - 10V.