Bastl Instruments

GrandPa Expander

Accessory

Main Details
Maker Bastl Instruments Company
Function
Form Factor Modular - 5U
Signal Path Analog Hardware
Made In Brno, Czech Republic
Power Source +12: ?mA
Notes Spa is an expander for the granular sampler module grandPa. It adds CV inputs for nearly all parameters and a clock input to trigger the grain shift. It doesn’t work without the grandPa Eurorack module.

The voltage on the CV inputs is relatively added to the grandPa settings on both channels A and B. All CV inputs react only to positive voltages. The update rate of these CV inputs is 20 Hz. Communication between SPA and Grandpa can introduce audible artifacts to some samples while tweaking the SPA knobs.


Four CV inputs have attenuator knobs. These CV inputs are normalised to 5V so the knobs act as a signal source when nothing is connected to the CV input.

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