bastl-instruments-grandpa

Bastl Instruments GrandPa

Compact dual granular sampler with microGranny 2.0 sound core

5 HP Eurorack module

GrandPa is a 5HP granular mono sampler that brings the microGranny 2.0 sound engine into Eurorack. It reads WAV files from a front-panel microSD card and offers per-sample control over sample rate, crush distortion, grain size, shift speed, attack, release, and start/end points. Two trigger channels (A and B) allow triggering different samples with independent parameter settings, though only one plays at a time. A CV input is freely assignable to any parameter. 35 samples and 35 presets can be stored, and the module supports grain sync for rhythmic granular effects.

Features

  • Granular mono sampler with microGranny 2.0 sound core
  • Reads 22050Hz 16-bit mono WAV files from microSD card
  • Two trigger channels (A/B) with independent parameter settings
  • Four parameter pages: Rate/Crush, Grain/Speed, Attack/Release, Start/End
  • RGB LED indicates active parameter page
  • CV input assignable to any sound parameter via FN + knob gesture
  • Grain sync mode for rhythmic grain shifting via CV trigger
  • Loop mode for continuous sample playback
  • 35 sample slots (P0-P9, PA-PZ) on microSD card
  • 35 preset slots storing both samples and all parameter settings
  • 12-bit DC-coupled output (0-5V) usable as CV source
  • Crush distortion for lo-fi character

Controls & Jacks (15)

  • Param A
  • RGB LED
  • Param B
  • Loop LED
  • Sync LED
  • Page
  • Up
  • FN
  • Down
  • Trig A Manual
  • Trig B Manual
  • Trig A
  • Trig B
  • CV In
  • Out

How-To Guides

  • Basic Granular Texture
  • Lo-Fi Crushed Beats
  • CV-Modulated Grain Texture
  • Dual Sample Alternation
  • Grain Sync Rhythmic Slicing

Explore the interactive GrandPa panel on BleepDex — tap any control to learn what it does.

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