Vintage Tuner Stompbox is a studio-grade, photorealistic analog needle chromatic tuner engineered specifically for electric guitars, acoustic instruments, drop tunings, and 4/5-string electric basses.

Developed by Main St Audio Labs using modern C++ / JUCE, the plugin bridges vintage visual aesthetics with cutting-edge, open-source DSP algorithms (MIT License) to deliver smooth, jitter-free needle ballistics without false octave jumps, screen flickering, or processing overhead.

Key Features:

• Dual Pitch Detection Engine (MPM & YIN):

- MPM Mode (McLeod Pitch Method): Ultra-fast transient tracking tailored for electric and acoustic guitar chords, arpeggios, and solo runs.

- YIN Mode: Specifically optimized for low-frequency instruments (4- and 5-string basses, 7/8-string extended-range guitars, and drop tunings), tracking fundamental frequencies down to B0 (Low B at 25 Hz / 30.87 Hz).

• True Zero-CPU Passthrough (0.0% Load):

- Suspends mathematical DSP analysis threads whenever the plugin GUI is closed or bypassed.

- Safe to leave instantiated across every single guitar and bass channel in your DAW project without wasting CPU cycles.

• Studio-Grade Ballistics & Anti-Jitter Smoothing:

- Physics-based analog needle movement with an exponential smoothing filter.

- Central deadzone (+/- 0.6 cents) prevents distracting flutter around the in-tune position.

- 18-frame (~0.6s) decay hold window allows seamless tuning on decaying, vibrating strings.

• Stage/Studio Mute with Safety Auto-Unmute:

- Silent tuning footswitch for live performances and studio sessions.

- Automatic unmuting safety trigger when the plugin editor is closed, preventing accidental muted tracks in mixing sessions.

• Signal Conditioner & Adaptive AGC:

- Automatic Gain Control with up to +41.58 dB of dynamic boost amplifies weak vintage single-coils and quiet notes without digital clipping.

- 18 Hz High-Pass and 1000 Hz Low-Pass filtering eliminates sub-bass rumbles and high-frequency pick noise.

• Smart Mono-to-Stereo Routing:

- Automatically mirrors single-channel interface inputs across stereo monitor buses.

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