The TubeOhm Pure-D16/24Grain Go to product viewer dialog for this item.
is an experimental granular software synthesizer designed for Windows that slices audio samples into tiny fragments (grains) to create lush textures, pads, glitch loops, and evolving drone soundscapes. It was originally released as a paid 32-bit VST plugin but has since been made available as freeware directly from the official TubeOhm website. 1. Installation Requirements & Setup
Because Pure-Grain is a legacy 32-bit Windows VST2 plugin, modern systems require specific setup steps to run properly:
Administrative Rights: You must run the installer by right-clicking and selecting “Run as Administrator”. This allows the plugin to properly extract and write its internal help and sample assignment files.
64-bit DAW Bridging: If you are using a modern 64-bit DAW (such as Ableton Live 11+, Cubase 64-bit, or Reaper 64-bit), the 32-bit plugin will not load natively. You will need a third-party bridging tool like jBridge to wrap the VST file for compatibility. 2. Core Architecture & Workflow
The signal path of Pure-Grain follows a classic “Input → Processing → Output” electronic music structure:
The Grain Oscillator: The heart of the synth. You load a custom audio sample (.wav format) into the visualization window.
Sample Scrubbing & Freezing: You can manual-drive or automate a playhead through the sample timeline. Stopping the playhead completely “freezes” the sound into a continuous, static microscopic texture.
Modulation Matrix: Controls how the grains shift over time. You can modulate the grain rate (how fast they trigger), grain size (how long each snippet is), and playback position using internal LFOs and envelopes.
Classic Subtractive Shaping: After the granular engine generating the raw sound, the signal passes through a standard Voltage Controlled Filter (VCF) and Voltage Controlled Amplifier (VCA) to shape the tone and volume dynamics.
Effects Rack: The end of the internal signal path features dedicated Chorus, Delay, Reverb, and a Gater function to add stereo depth and rhythmic pulsing to the generated ambient clouds. 3. Step-by-Step “Getting Started” Exercise
To design your very first ambient patch from scratch, follow these foundational steps:
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