Coilshift - Standard P/J Bass

COILSHIFT: STANDARD P/J BASS EDITION Transform your stock Fender or Yamaha P/J Bass into 14 legendary active, vintage, and acoustic pickup configurations. OVERVIEW Coilshift is the first collection of pickup and control-harness digital twins engineered for Neural Amp Modeler (NAM) and the Darkglass Anagram pedalboard. Rather than modeling an amplifier or speaker cabinet, these models capture the fundamental electro-acoustic physics of: • Pickup coil inductances, eddy currents, and DC resistance • Magnetic aperture geometry and spatial string comb-filtering • Era-accurate potentiometer loading and tone capacitor values • Instrument cable capacitance drag (750 pF) • Active onboard discrete preamps and EQ buffers This edition is specifically calibrated for a 34" Standard P/J Bass (Fender Precision PJ, Squier Affinity/Standard PJ, Yamaha BB Series, Sire P5R/P7, Charvel Pro-Mod) with stock passive split-coil P and single-coil J bridge pickups. RECOMMENDED SIGNAL CHAIN Place Coilshift as the very first block in your signal path: [Passive P/J Bass] -> [Block 1: Coilshift NAM Preamp] (Input / Pickup Front-End) -> [Block 2: Amp / Drive / Preamp] (Darkglass B7K, SVT, B-15, etc.) -> [Block 3: Speaker Cabinet IR] (8x10, 4x10, 1x15, etc.) -> [FOH / Audio Interface / DAW] P/J BASS KNOB GUIDE Keep physical Master Tone at 100% (Wide Open) for all models. Set your physical Volume knobs (or Blend control) according to the target model: Both Volumes 100% (or Blend Center Detent) • Use for: 01, 02, 07, 08, 11 • Combines the split-P neck with the single-coil J bridge in parallel. • Voice 08 is a true 1:1 physical and electrical identity match (0.0 dB flat). P-Pickup 100%, J-Bridge 0% (Solo P-Bass) • Use for: 04, 05, 06, 12, 14 • Focuses exclusively on the split-coil P magnetic aperture at 125.0mm. • Voice 05 is a true 1:1 physical and electrical identity match (0.0 dB flat). J-Bridge 100%, P-Pickup 0% (Solo J-Bridge) • Use for: 03, 09, 10, 13 • Focuses exclusively on the tight 60s bridge single-coil aperture at 63.5mm. • Voice 03 is a true 1:1 physical and electrical identity match (0.0 dB flat). THE 14 DIGITAL TWIN VOICINGS Jazz Bass Family 01. Modern Active Jazz Bass (NYC 2-Band) Knob Setting: Both Volumes 100% (or Blend Center Detent) Sadowsky-style active 2-band buffer with cable isolation (1M ohm in, 100 ohm out). Wideband hi-fi shimmer with +4 dB active bass/treble boost. 02. Vintage '60s Jazz Bass Pair Knob Setting: Both Volumes 100% (or Blend Center Detent) Authentic 1960s dual single-coils loaded by dual 250k volume pots (125k net) and a 47nF capacitor. Natural woody low-mid resonance with classic mid-scoop. 03. '60s Jazz Bridge Single-Coil Knob Setting: J-Bridge 100%, P-Pickup 0% True 1:1 physical and electrical identity match (63.5mm datum). Focused midrange growl and Jaco Pastorius staccato finger bite. Precision Family 04. Modern Ceramic Split-P (Boutique 500k) Knob Setting: P-Pickup 100%, J-Bridge 0% Modeled after the Bartolini 8CBP with modern 500k volume/tone pots, a 22nF Orange Drop cap, and hybrid treble bleed. Tight, percussive transient clamp with aggressive high-mid pick presence. 05. Vintage '62 P-Bass (Alnico V) Knob Setting: P-Pickup 100%, J-Bridge 0% True 1:1 physical and electrical identity match (0.0 dB flat). Classic 1962 CTS 250k harness with Paper-in-Oil 47nF cap. Organic dynamic touch sensitivity and warm woody bloom. 06. Split-P Motown Rolloff (47nF Shunt) Knob Setting: P-Pickup 100%, J-Bridge 0% Vintage split-coil with tone rolled completely to zero. Pure, pillowy sub-bass fundamental mass (James Jamerson / Pino Palladino flatwound tone). P/J & Music Man 07. Modern Active P/J Bass Knob Setting: Both Volumes 100% (or Blend Center Detent) Modern ceramic split-neck and single-bridge pair with active 2-band buffer. Aggressive modern slap snap with deep, solid sub-bass foundation. 08. Vintage '80s Passive P/J Bass Knob Setting: Both Volumes 100% (or Blend Center Detent) True 1:1 physical and electrical identity match (0.0 dB flat). 1980s Fender Special / Yamaha BB style Alnico V split/single pair with dual 250k volume loading. Thick hard-rock punch and woody attack. 09. Music Man StingRay (Active 2-Band MM) Knob Setting: J-Bridge 100%, P-Pickup 0% The Jazz bridge pickup (63.5mm) sits only 2.5mm from the genuine StingRay sweet spot (66.0mm). Synthesizes the authentic 2.5 kHz hollow mid-scoop and 7.2 kHz metallic clank peak. Progressive, Rock & Acoustic Transducers 10. Rickenbacker 4003 Bridge (4.7nF HPF) Knob Setting: J-Bridge 100%, P-Pickup 0% High-output bridge coil loaded with vintage 330k pots and a 4.7nF series high-pass capacitor. Cuts sub-bass mud below 150 Hz for bright clang and grit. 11. P/MM Hybrid (Series Sum) Knob Setting: Both Volumes 100% (or Blend Center Detent) Precision split-coil and Music Man humbucker wired in series. Massive +6.0 dB inductive voltage boost with forward, muscular 1.6 kHz punch. 12. Gibson Mudbucker Ultra Series Knob Setting: P-Pickup 100%, J-Bridge 0% Extreme overwound neck humbucker (14.4H inductance). Subterranean low end with steep natural acoustic top-end rolloff. 13. Dingwall Fanned Multi-Scale Bridge Knob Setting: J-Bridge 100%, P-Pickup 0% 34"-37" fanned-fret angled bridge sweet spot (48.0mm datum) with high-tension wave-speed clank filter. 14. Upright Acoustic Double Bass (Bridge Piezo) Knob Setting: P-Pickup 100%, J-Bridge 0% Direct bridge force sensor simulation (Underwood / Realist style) featuring velocity-to-force leaky integration, 32 Hz rumble cut, and acoustic body bloom. LICENSE & DISCLAIMER License: These neural model files are licensed for personal and commercial musical performances, recording, and production. Redistribution, sublicensing, or resale of the raw model files or derived profiles is prohibited. Trademark Disclaimer: All product names, trademarks, and registered trademarks (such as Fender, Precision Bass, Jazz Bass, Yamaha, Music Man, StingRay, Rickenbacker, Gibson, Dingwall, Squier, EMG, and Darkglass) are the property of their respective owners. These names and references are used solely to identify the historical instruments, physical pickup architectures, and analog circuits analyzed and modeled in this project. Coilshift is an independent project and is not affiliated with, sponsored by, or endorsed by any of these manufacturers.