Pitch Class Extractor

Parameters

Tuning (Hz) — Reference tuning for A4, in Hz, 430–450. 440 Hz is standard (“A 440”); other values shift the pitch reference. Use 432 Hz for some new-age tunings, 442 Hz for some European orchestras, 444 Hz for older Baroque-influenced ensembles. The pitch class detection follows this reference — set it to match your source material’s tuning if it deviates from 440.

Harmonic Width — How wide a frequency tolerance the extractor uses around each harmonic of the target pitch, 0–100%. Tight (0–20%) requires near-exact pitch matches — surgical extraction but can miss vibrato or detuning. Wider (40–80%) tolerates pitch variation — better for live recordings, vocals with vibrato, or detuned instruments. 10% is balanced for most clean material.

Additional controls

Mode — What to extract:

• Single — extract a single pitch class. The pitch class radio (C, C#, D, D#, etc.) selects which note to target. Extracts every occurrence of that note in any octave throughout the input.
• Chord — extract a chord (multiple pitch classes simultaneously). Use chord_type to specify the chord quality (Major, Minor, Dom7, etc.). The pitch class radio selects the chord root.

Pitch Class — Selects the target note (in Single mode) or chord root (in Chord mode): C, C#, D, D#, E, F, F#, G, G#, A, A#, B. Extracts that note across all octaves in the input.

Chord Type — In Chord mode only: chord quality:

• Major — root + major 3rd + 5th.
• Minor — root + minor 3rd + 5th.
• Dom7 — major + minor 7th.
• Maj7 — major + major 7th.
• Min7 — minor + minor 7th.
• Dim — diminished triad.
• Aug — augmented triad.

About Pitch Class Extractor

This node identifies and extracts every occurrence of a specific note (or chord) from the source — across all octaves. For example, set Single mode to “C” and the extracted output will contain every C in the input, regardless of which octave it occurs in. Set Chord mode to “C / Maj7” and you’ll extract every C major 7 chord present in the input, including its constituent notes when they sound separately. Use it for: pulling a specific note’s contribution out of a complex mix (perfect for “highlighting” or “dimming” specific harmonic content), generating note-targeted effects (route extracted-Cs through a different reverb), or isolating chord progressions from texture beds. The two outputs (extracted + rejected) sum to the original — process each independently and recombine. The K2K-flavored take on note-isolation: works without MIDI, directly on the audio.

Generated 2026-05-05 from K2K_Dev@96730bdc by scripts/gen_lexique.py. Edit _intros/ or _overrides/, not this file.