TWEAKER Addon Premium

basehead‘s built-in 8-slot polyphonic MIDI sampler. Turn your sound library into a playable instrument — without leaving basehead.

What it is

An 8-slot polyphonic MIDI sampler built directly into basehead‘s NodeTree panel. Plug in a MIDI controller (or use the on-screen virtual keyboard), drag sounds from your library into slots, and start playing.

Sound designers spend their days hunting for the perfect sound — sometimes it’s faster to make it from raw materials you stack, layer, and mutilate.

Key features

8 independent sampler slots

Each slot is a self-contained instrument with its own:

• Volume & Pan — full mixer-style control per slot.
• Solo & Mute — isolate or silence individual slots on the fly.
• MIDI Key Range — define exactly which notes trigger each slot (Low Key / High Key).
• Root Note — set the original pitch so TWEAKER pitch-shifts automatically when you play higher or lower.
• Playback Direction — forward or reverse.
• Loop Modes — one-shot, loop, or ping-pong (in both directions — six modes total).
• Round Robin Trigger — sequential, random, or not-random (3 modes).
• Region & Trigger Markers — restrict playback to a section of the sample and set a custom start point.

Drag-and-drop loading

Found a sound in your Results grid? Drag it directly onto a TWEAKER slot. CloudPack files download automatically — you’ll see a progress bar right on the slot until it’s ready.

MIDI Learn

Hit the Learn button on any slot, then play two notes on your controller — TWEAKER sets the key range automatically. The same goes for Root Note: one button, one keypress, done. Every knob and slider in TWEAKER also accepts MIDI Learn — assign any CC to volume, pan, ADSR, filter, anything. Right-click the control, hit Learn, twist the knob on your controller, done.

Pitch wheel support. Map your controller’s pitch wheel to the main Pitch slider (or globally via the SAMPLER CONTROLS header right-click) — TWEAKER detects pitch-bend messages and locks the slider into Semi (semitone) mode automatically. The right-click MIDI Learn flyout exposes a Pitch Bend Range submenu.

Real-time visual feedback

Every sampler slot shows a mini waveform with a live playhead, region markers, and trigger position. A MIDI activity LED confirms your controller is connected and talking. Each of the eight slots has its own color for instant identification.

Double-click any mini-waveform to open a full-size editor for setting region markers and trigger points precisely.

Preset system

Dial in the perfect multi-slot configuration and save it as a preset. TWEAKER stores everything — file paths, mixer settings, MIDI ranges, loop modes, marker positions — as a portable JSON file. Load it back anytime, update it in place, or start fresh with Reset All.

Virtual keyboard

No MIDI controller handy? TWEAKER includes a 3-octave on-screen keyboard (C3–B5) so you can trigger slots with mouse clicks. Great for quick auditioning or laptop workflows.

A live pitch-wheel widget to the left of the keyboard — controller’s pitch-bend in real time. Right-click it to MIDI Learn the global Tweaker pitch wheel and pick its bend range.

Under the hood

Up to 128 simultaneous voices per slot. Pitch-shifting is calculated from the interval between the triggered note and the root note — wavetable-style resampling from a single loaded file. Full ADSR envelope and filter controls are accessible through the dedicated ADSR panel for deeper sound shaping.

The workflow

1. Browse your library in basehead.
2. Drag sounds onto slots.
3. Tweak the knobs, sliders, and whack the MIDI keyboard until you make something fresh.
4. Record your new creation with Performance Take Recording (included with the TWEAKER license), or use basehead Connect to route to your DAW for recording.

Need to Receive MIDI from a DAW?

TWEAKER can be played from any DAW running on the same machine via a virtual MIDI loopback. macOS and Windows each need a one-time OS-level setup.

Open the DAW MIDI Guide →

Happy Tweaking!