GAAP: Guitar Amp & Effects Sim

GAAP (Guitar Android Audio Processor) is the professional, low-latency guitar multi-effects pedalboard, tube amp simulator, 4-track MIDI backing player, and 100% offline AI jam station for Android musicians.

Plug in your guitar or practice acoustically! Powered by a high-performance C++ Oboe engine, GAAP delivers ultra-low latency audio for live gigs, home recording, and headphone practice. Use it as a full guitar rig or a standalone rhythm station with zero cables required.

🎛️ 4-TRACK LIVE MIXER & MIDI BACKING TRACK IMPORT
Take total control of your jam sessions with our new 4-track audio engine:
• Custom MIDI File Import: Import any standard .mid or .midi file directly into "My Own Presets".
• Smart Track Routing: Automatically route MIDI channels to Drums, Bass, Piano Accompaniment, and Lead Melody.
• Live Mute & Level Mixing: Mute the lead guitar or solo line with one tap to play it live yourself!
• SoundFont Synthesizer (GAAP_SYNTH.sf2): Multi-channel acoustic kits (Standard, Room, TR-808, Jazz) and rich instruments.

🎸 STUDIO GUITAR EFFECTS & TUBE AMP SIMULATOR
Build your dream tone with authentic analog DSP emulations:
• Dynamics & Boosts: Ross-Style OTA Compressor, J102 JFET Booster, Optical Compressor, and Clean Lead Sustain.
• Tube Amps & Drives: SD-1 Mid-Hump, Transparent Overdrive, JCM800 High-Gain, AC30 Top Boost, 1959 Plexi, 1959 Bassman, '65 Twin Reverb, and Dual Rectifier preamps.
• Power Amps & Cabs: 6L6, EL34, EL84, 6V6 tube stages with authentic 1x12, 2x12, and 4x12 impulse response cabinets.
• Lush Modulation: Tri-Chorus (up to 10 voices), Classic CE-1, A/DA & Through-Zero Flanger, Phase 90, Optical/Harmonic Tremolo, and Modern Auto-Wah.
• Delays & Reverbs: Tape Echo, Dual Delay, Ping-Pong, Shimmer, Reverse, Multi-Tap, Spring, Plate, Room, Hall, and Cloud Reverb.
• Tone Sculpting: Studio Noise Gate, 2nd-Order Biquad Pre-Filters, and 6/12/24-Band Parametric EQs.

🤖 100% OFFLINE ON-DEVICE NANO SLM (AI BACKING BAND)
Generate realistic backing tracks entirely on your device without internet or cloud servers:
• On-Device AI Generator: Type natural prompts (e.g. "Texas blues shuffle in E") or select from musical archetypes.
• 4-Voice Composition: Generates Acoustic Drums, Slap/Fingered Bass, Piano Harmony Chords, and Melodic Leads.
• Real-Time Chord Detection: Live analyzer detects chords and extensions (Cmaj7, Dm9, G13) measure-by-measure.
• Factory Library: Instant access to iconic rock, metal, blues, funk, jazz, and latin factory backing presets.

🎼 IN-APP SONG STUDIO & MULTI-TRACK DAW
Full editing control over your songs:
• In-App Score Editor: Edit drum hits, bass notes, piano voicings, and lead riffs note-by-note.
• Flexible Time Signatures: Supports 4/4, 3/4, 2/4, 6/8, and micro-grid timing from 1/4 to 1/64.
• Web Arranger Sync: Build song sequences at gaapandroidapp.com/editor/dist/ and import them directly.

⚡ LOW-LATENCY C++ OBOE ENGINE & HARDWARE
• Native Audio Pipeline: Engineered with Google Oboe for pro-grade round-trip latency.
• Standalone or Interface: Use USB interfaces (Focusrite, iRig, Behringer) or simply practice with the built-in mic and Feedback Shield.
• Built-In Chromatic Tuner: 4096-point strobe and needle tuner with EMA smoothing.

🔄 QUANTIZED LIVE LOOPER & RECORDER
• Locked Groove Sync: Loops lock in frame-perfect sync with drum and backing sequences.
• Multi-Layer Overdubbing: Record, overdub, undo, and layer rhythm tracks seamlessly.

🎛️ WIRELESS BLE MIDI FOOT CONTROLLER
• Hands-Free Stage Control: Connect any wireless BLE MIDI pedalboard with customizable switch and expression pedal mappings.

🎥 HD VIDEO JAM RECORDER & SOCIAL EXPORT
• Record mixed jam audio (Guitar + Band) or isolate wet guitar tone.
• Share Everywhere: TikTok, Instagram Reels, YouTube Shorts, and Facebook.

🚀 CONSTANT EVOLUTION & ROADMAP
GAAP is in active, continuous development with regular updates adding new amps, pedals, and AI features!