GrooveTransfer

Steal one track's groove and stamp it onto another - free, no strings.

GrooveTransfer by XeniAudio is a free cross-track groove-transfer plugin.
It extracts the transient envelope - the "groove" - of one track and applies it to the dynamics of another, with no MIDI and no sidechain routing: instances discover each other automatically over lock-free shared memory and pair by name, across tracks, busses and even between plugin formats.

Place a Sender instance on the source track (the feel you want to borrow) and a Receiver on the target track. The Receiver rides its own audio to the Sender's groove: positive Mix values make the target move with the groove (kick-pumping a bass, a pad breathing with the drums); negative values duck it against the groove (a delay that gets out of the vocal's way), up to ±24 dB.

Features:

• Fast/slow envelope follower pair with Sensitivity, Attack (0.1-100 ms) and Release (5-2000 ms) controls.
• Sender / Receiver / Both roles; up to 16 instances share the registry and can be chained so several tracks follow one common groove.
• Pairing by instance name - survives project reloads and renames are followed live.
• Live 1.5-second envelope scope showing exactly what is broadcast or received.
• Hover hints on every control; receive-only peers are flagged in the selector.
• Resizable, aspect-locked interface (60%-300%), size saved per project.
• - Envelope is exchanged at a reduced 4 kHz control rate - negligible CPU per pair.

GrooveTransfer is completely free: the full plugin, with no license key, no account and no time limit. It is built with the open-source iPlug2 framework and shares its inter-plugin shared-memory engine with the rest of the XeniAudio range (McPlugins, SpectralMediator, PhantomTrack).