CAP_01 Follow falling notes
Watch the target part move toward the hit line while the virtual keyboard shows the active range.
MIDI practice / Live
MIDI Practice Simulator — Play Along with Falling Notes
Turn any local MIDI file into a focused keyboard practice session with falling notes, adjustable tempo and instant timing feedback.
Capability map
What the MIDI practice simulator does
CAP_02 Play with your keyboard
Use the on-screen keyboard, computer keys or a supported external MIDI keyboard without uploading your file.
CAP_03 Practice at your pace
Slow down a difficult passage, change BPM and restart the target track whenever you need another attempt.
Workflow
How to practice MIDI with a keyboard
STEP_01 Import
Drop a standard .mid or .midi file into the simulator. The file is parsed locally in your browser.
STEP_02 Choose a part
Select a non-conductor track so you can focus on the melody, bass line or instrument you want to learn.
STEP_03 Play and review
Start the session, follow the hit line and use the accuracy, combo, missed and wrong-note feedback to guide your next attempt.
№ 03 — Practice
How MIDI practice scoring works
The simulator compares each incoming note with the selected track on the same MIDI timeline. Notes close to the target onset receive a timing result, while notes that pass the timing window without an input are marked missed. A wrong note is reported separately so you can see whether the problem was timing or pitch. Simultaneous target notes are grouped as a chord and show their completion progress while each note keeps its own timing result.
The first version is designed for focused repetition rather than a course or leaderboard. Select one part, mute the rest if you prefer to listen to a guide, reduce the tempo and repeat the same section until the feedback becomes consistent. For detailed arrangement inspection, open the online MIDI player; for changing notes or simplifying a part, continue in the online MIDI editor.
Only use public practice tracks when their source and license permit your intended use. Miditor keeps license records for its curated catalog on the MIDI licenses page. Local files remain a private browser session, but local access does not change the copyright status of the music.
MIDI practice FAQ
Questions about MIDI keyboard practice
Do I need a MIDI keyboard?
No. You can click the virtual keyboard or use the computer-key mapping. A supported MIDI keyboard is an optional input device.
Does Miditor upload my MIDI file?
No. A local file is parsed in your browser for the practice session. Miditor does not need an account or a server upload for local practice.
Can I slow down a difficult passage?
Yes. Choose a speed from 0.5× to 2× or set a BPM between 30 and 240. You can reset the session and try the target track again.
Why is my MIDI keyboard not detected?
Web MIDI requires a supported secure browser context and permission. If the browser does not expose Web MIDI, use the virtual or computer keyboard instead.
How do I calibrate MIDI input timing?
Open the input timing guide, start at 0 ms and play five repeated notes. Adjust the compensation in 5 ms steps until the timing feedback is centered. The setting only affects external MIDI input.
Can I reuse MIDI files from another website?
Only when the individual file has permission for your intended use. Check its source and license; a download button or a public page is not a blanket redistribution license.