Practice visually
Turn a reference MIDI part into falling notes over real audio, backing tracks or stems.
MVP tester build
From MIDI that exists to MIDI you can actually play.
SMB (SoundMidiBender) is a local Windows desktop app for practicing, cleaning, adapting, recording and exporting piano or bass MIDI from your own songs.
Use full songs, backing tracks, stems and MIDI as a guided practice session with falling notes, then export useful MIDI for Ableton, FL Studio, Reaper or your DAW.
Windows desktop Local/offline Piano and bass
Desktop app preview
Real Windows app, local project workflow
Built with a dark music-production interface for visual MIDI practice, keyboard adaptation, recording and export.
Built for real songs, not isolated exercises
SMB is a bridge between audio/MIDI material and a playable, recordable MIDI performance.
Adapt to your keyboard
Use cleanup, range adaptation and remapping so the part fits your real keyboard.
Record and export
Capture a synced take and export original, cleaned, adapted, humanized or recorded MIDI.
The problem
You have the song, stem or MIDI, but not a playable version.
AI songs, stems and generated MIDI can contain useful ideas, but the MIDI may be messy, too wide for your keyboard or hard to turn into a real performance.
Imported MIDI can contain ghost notes, dense starts, very short notes or suspicious velocities.
A 25, 49 or 61-key MIDI keyboard may not cover the full piano or bass range.
A produced or AI-generated part often needs practice, cleanup and a human take before it is useful in a DAW.
A focused 4-step flow
The app keeps the workflow local and practical, from project setup to MIDI export.
- 01
Create a local project
- 02
Import audio and MIDI
- 03
Practice and adapt
- 04
Record or export to your DAW
Who it is for
For musicians, producers and creators who turn songs, stems and generated ideas into editable MIDI material.
Music producers using AI music tools who want to reuse parts in a DAW.
Beginner and intermediate pianists or bass players practicing their own songs visually.
Creators who separate stems or generate MIDI from audio and need to clean it.
Users with compact 25, 49 or 61-key MIDI keyboards.
Freelancers and producers preparing quick MIDI arrangements.
Composers who want to turn programmed MIDI into their own performance.
Core functions
The tester build focuses on local projects, MIDI parsing, visual practice, keyboard adaptation, simple editing, recording and export.
Local projects
- Create offline projects
- Keep each song in an organized folder
- Copy imported files into the project
- Use demo projects and recent local projects
Audio and MIDI
- Import full songs, backing tracks and stems
- Import piano or bass MIDI
- Read MIDI duration, notes, range and tracks
- Manual audio/MIDI sync offset
- Audio and MIDI guide volume controls
Visual practice
- Falling-note practice view
- Upper reference keyboard and lower interactive keyboard
- Real play, pause, stop, forward and rewind
- Practice at 50%, 75% or 100%
- Loop A-B for fragments
MIDI keyboard
- Physical MIDI keyboard input
- Internal piano and bass presets while playing
- MIDI guide playback uses the selected preset
- Expected and played note highlights
- Out-of-range note detection
- 25, 49, 61, 88 or custom ranges
Cleanup and adaptation
- Detect suspicious notes without deleting automatically
- Make playable on my keyboard
- Manual note remapping for small keyboards
- Simple MIDI editor for fast corrections
- Save original, cleaned or adapted copies
Recording, export and language
- Arm recording with REC
- Start recording in sync with Play
- Save MIDI takes
- Export original, recorded, loop or edited MIDI
- Spanish/English UI and note names
Differentiators for real production
The strongest parts of the app are not about magic conversion. They are about making an existing MIDI part playable, cleaner and more useful.
Make playable on my keyboard
Detects notes outside your configured range and moves low notes up or high notes down by octaves while preserving timing and rhythm.
MIDI cleanup
Finds suspicious notes such as out-of-range notes, dense starts, very short notes, low velocity notes and duplicates or overlaps when available.
Humanize MIDI
Creates controlled variations in timing, velocity and duration while preserving chords, with soft, medium and strong ranges.
Manual remapping
Map a target note to a physical key, for example playing D4 to represent G5, so the animation follows your real keyboard.
Inside the app
SMB is organized as a guided desktop workflow, not a generic DAW.
Home / Library
New project
Import files
MIDI keyboard setup
Audio/MIDI sync
Main practice view
Simple MIDI editor
MIDI recording
MIDI export
Settings
Step-by-step help
Requirements
The tester build is designed for local Windows use.
Windows desktop
Local audio and MIDI files
MIDI keyboard recommended
Piano or bass workflow
Clear beta scope
SMB prepares MIDI material for practice and production. It is deliberately not trying to replace your DAW.
Is
- A Windows desktop app
- An offline local-file workflow
- A focused MVP for piano and bass
- A bridge between songs, practice and DAW-ready MIDI
- Built with Tauri, React, TypeScript, Tailwind and Rust commands
Is not
- Not a web app
- Not an automatic audio-to-MIDI converter yet
- Not a full DAW
- Not a cloud SaaS or login-based system
- Not an advanced MIDI editor
- Not a replacement for Ableton, FL Studio or Reaper
Roadmap after beta
The first beta is intentionally focused. Future iterations can expand the editor, practice tools and instrument support.
More complete MIDI editor
Better adaptation for small keyboards
More sounds, including SF2 workflow improvements
More export options
Improved demos and example projects
Future compatibility with more instruments
Tester build
Want to test SMB?
Send a short email with your DAW, MIDI keyboard and the kind of songs you want to practice or prepare.
Join the test
This opens an email to pisounds@proton.me.