Bass Trainer

This is a personal project built for my own bass practice. It is not designed as a general-purpose tool and may not be useful or usable for anyone else.

A browser-based practice tool for bass. Drop in your Guitar Pro files, plug in your mic, and play along — the app listens in real time and tells you how tight your groove is.

What it does

• Listens to you play via microphone, detecting pitch and timing as you go
• Scores your performance after each exercise: note accuracy, timing consistency, and a Groove Lock score that shows whether you rush or drag
• Renders interactive tablature with both standard notation and tab, so you can loop sections, adjust the tempo, and use a built-in metronome to work on tough passages
• Tracks your progress across sessions, saving your best scores per exercise
• Loads your own GP files — drop Guitar Pro files into repository-exercises/ and they appear instantly in the file browser, no conversion needed
• Chromatic tuner — built-in tuner with visual needle and note detection
• Standalone metronome — configurable with accent, click sound, and subdivisions

Exercises

Built-in exercises range from beginner to advanced and cover groove patterns, melodic movement, string crossing, sixteenth-note foundations, and speed builders. You can also load any Guitar Pro file (.gp, .gpx, .gp3–.gp5) from the directory browser.

Adding your own files

Put Guitar Pro files anywhere under repository-exercises/, organized in subfolders however you like:

repository-exercises/
└── Jules/
    └── 2026-03-23/
        ├── Fly Away.gp
        └── groove exercise.gp

They show up in the directory browser automatically after a page reload (Vite picks them up at build time).

Getting started

npm install
npm run dev

Select an exercise from the sidebar or the directory browser, enable your microphone, and hit play. A count-in gives you time to settle before evaluation begins.

Keyboard shortcuts

Key	Action
Space	Play / Pause
Esc	Stop
L	Toggle loop
M	Toggle metronome
F	Fullscreen
← / →	Tempo ±5 BPM
↑ / ↓	Tempo ±1 BPM

Stack

React · TypeScript · Vite · AlphaTab (sheet music rendering & GP parsing) · Web Audio API