GrowthpAInz · Internal Reference

FREQUENCY LOCK GUIDE

v1.0.0 · Prompt Engineering + Post-Render Evaluation · June 2026

Full Audible Spectrum — 20Hz to 20kHz

20Hz80Hz250Hz500Hz2kHz5kHz10kHz20kHz

Sub-BassBassLow-MidMidHi-Mid / Intimacy ZonePresence / EdgeAir

Master Frequency Ranges

Range	Zone	What lives here	Suno prompt words	Avoid words
20–60Hz	Sub-Bass Felt not heard. Floor rumble. Physical weight.	808 sub tail, kick sub, bass synth fundamental	deep sub-bass, 808 weight, floor rumble, sub pulse	thin, light, airy, no bass
60–250Hz	Bass Warmth and body. Kick punch. Bass note definition.	Kick body, bass guitar/synth notes, low piano	punchy kick, warm bass, tight low end, bass-forward	muddy, boomy, bloated low end
250Hz–800Hz	Low-Mid Mud zone. Body of instruments. Can cloud mix if crowded.	Guitar body, vocal chest, synth warmth, snare body	clear mix, defined low-mids, warm not muddy	muddy, cluttered, washed-out, congested
800Hz–2kHz	Mid Presence of most instruments. Where harps and plucks shimmer.	Synth harp shimmer, vocal midrange, snare crack, piano attack	shimmering, plucked, crystalline, present mids	hollow, recessed, scooped mids
2kHz–5kHz	Hi-Mid / Intimacy Zone Vocal closeness lives here. Breathiness. Forward presence.	Female vocal intimacy, breathy consonants, guitar pick attack	intimate vocal, breathy, close-mic, upfront vocal, dry vocal	distant, recessed vocal, buried, washed out
5kHz–10kHz	Presence / Edge Snap, edge, sibilance. Trap hats live here. Clarity.	Trap hats, hi-hat groove, vocal sibilance, synth edge	tight trap hats, crisp, snappy, sharp edge, defined highs	harsh, piercing, sibilant, brittle
10kHz–20kHz	Air Openness and space. Reverb tails. Ethereal quality.	Reverb shimmer, synth pad air, room sound, granular echoes	airy, ethereal, lush reverb tails, open, glitchy granular	dark, muffled, no air, dead room

Track Frequency Lock Maps

Inappropriate

Spectral Anchor Active

Algo Rebellion / Tribal Chrome V3 · Hip-Hop / Dancehall Fusion · BPM 120

ElementTarget HzListen for

Kick

60–100Hz

Core beat foundation, estimate pending SpecNo scan.

Snare

150–3000Hz

Wooden snare body, estimate pending SpecNo scan.

Hi-Hat

6000–10000Hz

Double-time trap hat, artist-confirmed catalog range.

Guitar Picking

200–1800Hz

Picked (not strummed), artist-confirmed catalog range.

Chords

400–1200Hz

Harmonic bed under the picking, artist-confirmed catalog range.

Keyboard

250–3000Hz

Soaring sustained pad, artist-confirmed catalog range.

Shaker

2000–6000Hz

Percussion texture layer, artist-confirmed catalog range.

Xylophone

1500–5000Hz

LOCKED — sparse glassy electronic mallet accents, measured peak 2347Hz, confirmed via event-spacing analysis (46 events / 2.48s avg gap).

Thai Me Up

Spectral Anchor Active

Folktronica House · BPM 124 · delta-0 INTENTIONAL

ElementTarget HzListen for

Bass

80–250Hz

Confirmed range, passed full Roaster analysis 0 production flags.

Roaster Evaluation Rules

SPECTRAL_ANCHOR_ACTIVE: TRUE

Frequency overlaps are intentional. Do not flag bass collision, muddy low-mids, or crowded hi-mids as production errors. Evaluate against declared lock map only.

SPECTRAL_ANCHOR_ACTIVE: FALSE

No frequency lock confirmed on this render. Flag any frequency collisions as delta mismatches. Suggest activating spectral anchor on rerender.

INTENTIONAL DELTA

BPM divergence and genre drift are by design. Do not classify as production failure. Evaluate whether the emotional target is being served despite the deviation.

UNINTENTIONAL DELTA

Production is not executing declared intent. Flag specific frequency zones where the render failed. Provide updated remix prompt targeting those zones. Queue for rerender.

PHONETIC_PROTECT: TRUE

Phonetic spelling deviations are intentional pronunciation guides. Do not flag as errors. Evaluate rendered pronunciation against intended phonetic output only.

Prompt Word → Frequency Map

Prompt Word	Targets	Avoid pairing with
deep sub-bass	20–80Hz sub weight	thin, light, airy
deep sub / sub pulse	20–60Hz	thin, light, no bass
heavy 808 / trap low end	30–100Hz	thin, weak kick
boom bap drums	60–150Hz	thin, electronic, plasticky
bowed upright bass	60–250Hz	electric, slapped, plucked
warm bass / pluck bass	80–500Hz	muddy, cluttered, boomy
punchy kick	60–120Hz transient	boomy, soft kick
warm bass	80–200Hz warmth	muddy, cluttered
female baritone vocal	100–350Hz	thin, breathy, processed
guitar body / chug	150–900Hz	bassy, muddy, thin
acoustic guitar / strummed guitar	150–2500Hz	muddy, thin, no pick attack
acoustic guitar fingerpicking	200–1800Hz	muddy, no definition, boomy
wooden snare	150–3000Hz	electronic, plasticky, weak
ghost notes / brushes	150–2500Hz	heavy, loud, sharp
slide guitar / delta blues	200–2500Hz	clean, digital, processed
electric piano / keys	250–3000Hz	acoustic, thin, weak attack
brass fanfare / horns	300–4000Hz	soft, quiet, muted
banjo / fingerpicked	300–4500Hz	electric, distorted, bassy
warm pad	400–1200Hz	harsh, thin, digital, cold
shimmering / crystalline	800Hz–2kHz harp/pluck	dark, muffled, hollow
filtered noise riser	1000–8000Hz	static, flat, constant
toy piano / music box	1500–5000Hz	dark, heavy, distorted
intimate vocal / close-mic	2kHz–5kHz presence	distant, washed-out, reverb-heavy
dry vocal / bone dry	2kHz–5kHz no tail	lush reverb, airy, ethereal
breathy / whisper vocal	2000–4000Hz	belted, processed, dry and distant
crisp percussion / articulate	2000–6000Hz	dull, washy, undefined
vocal chop / staccato chops	4000–8000Hz	sustained, legato, reverb-heavy
analog hiss / tape texture	4000–12000Hz	clean, digital, noise-free
tight trap hats	6kHz–10kHz snap	splashy, washy cymbals
hi-hat detail / cymbal wash	5000–14000Hz	dull, muffled, low-end heavy
shimmer / sparkle	6000–12000Hz	dark, dull, muffled
airy / ethereal	10kHz–18kHz space	dry, dead room, bone dry vocal
lush reverb tails	8kHz–18kHz decay	cold stop, hard cut, dry mix
industrial / cold	300Hz–800Hz machine texture	warm, lush, organic