Extractors

Extractors are the nodes that pull a specific feature out of a sound and let you treat it as its own object — the move that makes K2K a spectral sampler rather than just a graph editor. Every extractor outputs both the extracted layer and the residual (what’s left after extraction), so a single node turns one buffer into two parallel streams you can process independently. Transient Extractor isolates the percussive attacks, leaving everything else in the residual. HPSS Extractor separates harmonic content from percussive content. Formant Extractor pulls out vocal/resonance formants. Spectral Envelope Extractor separates timbre from excitation. Spectral Peak Extractor keeps just the strongest resonant peaks. Pitch Class Extractor extracts all instances of a chosen note class across all octaves. Noise Floor, Silence, Micro Transient, and Temporal Envelope round out the set, each isolating a different kind of feature. Pair every extractor with the matching scope color mode upstream so you can see what you’re about to extract before committing to it. This is the category that gets its own tutorial — Tutorial 03 in the Editor track — because everything K2K does that other samplers can’t begins here.