BASTL Instruments
GrandPa V 1.1 Upgrade

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Item: N13-5262

Availability: In stock



GrandPa V 1.1 Upgrade


The Grandpa upgrade adds a new feature, allowing the sample to change via CV, using the threshold for changing samples as one semitone of a 1v/oct quantized voltage. Other minor bugs have been fixed, as well as it's over all stability. The connection between the grandpa expander, SPA, has been reinforced for higher functionality. 

The upgrade pack contains a microprocessing chip, a screwdriver, and a sticker. 

Once installed, the feature can be accessed by holding the FN button and pressing UP as if one were activiating the Grain Sync feature. There are no four states: Off, Grain Sync, Change sample on rising gate, or Change Sample on Change in CV. 


  • Upgrade for BASTL Grandpa
  • Two modes for changing samples - one with a gate, and one with 1v/Oct semitones

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  • See BASTL's website for details and installation guides

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