Felt & Fog is a six-layer ambient piano library for Kontakt 8. It's built for slow music, film cues, documentary underscore, neo-classical sketches, ambient and meditative tracks, atmospheric sound design.
 

The samples were hand-played without a click track, so every layer drifts at its own natural pace. Two of the six layers are Swarms — evolving harmonic clouds that don't lock to a grid. Hold a chord and it keeps moving. Nothing repeats in any way you can hear.
 

Made by Renger Koning, Amsterdam-based composer for film, documentary and contemporary dance. €49, with a free demo if you want to try before you commit.

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The six layers, and what each one brings to a mix

You'll almost always combine three to six layers at once — that's how the library is designed. Here's what each one contributes.

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Felted Piano — a warm, intimate upright with felted hammers. The recognisable piano voice at the front of a mix. It's the only layer that doesn't loop, so each note fades into silence. 

Carries the foreground in: sparse film themes, lo-fi piano, late-night documentary intros.

​EP Ambient — a processed electric piano with a soft shimmer. The romantic layer. Sits beautifully behind dialogue without competing with it. 

Adds warmth to: love scenes, tender flashbacks, slow indie ballads, Mac Quayle-style soft underscore.

​The Fog — time-stretched particles that bloom into an ethereal haze. The layer that sounds least like a piano. Reach for it when you want atmosphere, not melody. 

Adds atmosphere to: dream sequences, transitions, scenes with no dialogue, ambient-only cues.

​Octave Swarm — a dynamic, octave-layered Swarm. The most active layer. It moves on its own and adds harmonic motion to a held chord without you touching anything. 

Adds motion to: evolving sustained pads, generative sketching, the moment in a cue where you need something to shift.

​Minimal Swarm — subtle repeating notes that create a floating texture. The Eno layer. Pulse-like, but never on a grid.

Adds drift to: meditation tracks, slow-build cinematic openings, anywhere you want forward motion without rhythm.

​Glass — harmonic overtones and resonances built with the Ferrous form Landscape. Adds depth and a slight unease.

Adds unease to: slightly eerie underscores, mysterious documentary cues, atmospheric sound design.