DEV Community: 朱智勇

MIDI Editing 101: Turn Raw Audio into Music You Can Actually Edit

朱智勇 — Sun, 09 Aug 2026 09:31:40 +0000

Most musicians hit the same wall: they can record audio, but editing it feels like working with wet clay. You can't just grab a single note, slide it, and fix a slightly-off performance. Audio is stuck in time.

MIDI changes that. Here's a beginner's guide to what MIDI actually is, why it's so much easier to work with than raw audio, and how AI is closing the gap between the two.

What Is MIDI, Really?

MIDI (Musical Instrument Digital Interface) isn't sound. It's instructions — data that says "play this note, at this pitch, for this long, at this velocity." Think of it as sheet music for computers: it describes what to play, not the sound itself.

This is why MIDI is so powerful:

Move a note by milliseconds to tighten a performance
Change the tempo without pitch-shifting anything
Transpose an entire part up a fifth in one click
Swap a piano part for strings with zero re-recording
Fix wrong notes by dragging them to the correct pitch

Audio can't do any of that. Once a note is baked into a recording, it's stuck.

The Problem: Getting Audio Into MIDI

The catch has always been the same: your ideas live in audio, but your editing power lives in MIDI. You have a piano riff recorded as an MP3, but you want to adjust it — you're stuck.

Historically, your options were:

Replay it by hand into a MIDI keyboard — tedious and loses the original feel
Hire a transcription service — slow and expensive
Use pitch-detection plugins — often brittle on real recordings

None of them preserve the momentum of the original take.

How AI Transcription Helps

Modern AI transcription tools listen to an audio file, detect the note onsets and pitches, and produce editable MIDI data — often with surprising accuracy on clean, single-instrument recordings.

A good example is MP3 to MIDI, a free browser-based converter that works entirely on your device. You upload an MP3, it detects the notes, shows them in a piano roll you can click and edit, and exports a standard MIDI file.

The key point: you get the feel of your original recording as editable note data, not a sterile re-transcription.

A Beginner's Editing Workflow

Here's how to go from an MP3 recording to something you can genuinely edit:

Step 1: Record clean

The quality of your MIDI output depends heavily on the input. A clear, single-instrument recording with minimal background noise transcribes dramatically better than a dense mix. If you're recording a melody, keep it simple.

Step 2: Convert

Drop the MP3 into an AI converter like MP3 to MIDI. Choose the preset that matches your instrument — voice, piano, guitar, bass, or a full song. The model detects pitches and produces a piano roll.

Step 3: Clean up in the piano roll

This is where you take control. In the piano roll editor:

Delete false detections — short blips the model picked up
Quantize rhythm where you want it tight
Fix pitch — drag notes to correct pitch where the model guessed wrong
Adjust velocity to shape dynamics

Step 4: Export to your DAW

Export the .mid file and open it in Ableton, Logic, FL Studio, Reaper, or any DAW. Now you have a fully editable MIDI part you can build on — add harmony, change instruments, or use it as the skeleton for a full arrangement.

What to Expect (Honest Reality Check)

AI transcription is genuinely useful, but it's not magic:

Works well:

Solo voice and melodies
Piano and keyboard lines
Guitar and bass parts
Clean, isolated instruments

Needs work:

Full-band mixes with drums, bass, and vocals overlapping
Heavy reverb and effects
Percussion

For dense mixes, transcribe elements separately rather than expecting one clean result. And always trust your ears — the transcription is a starting point, not a verdict.

Why This Matters for Songwriters

The real payoff: you stop losing ideas. That melody you hummed into your phone, that piano riff you recorded as a voice memo — instead of sitting in your recordings folder forever, it becomes an editable MIDI part within minutes. You can develop it, arrange it, and turn it into a song.

Ideas that used to die in your voice memos app now become the seed of actual projects. That's the whole point of closing the gap between audio and MIDI.

Start Simple

If you're new to MIDI editing, don't overcomplicate it. Take a short, clean recording — a single voice or instrument — and run it through MP3 to MIDI. Play with the piano roll. Export the MIDI and try editing it in your DAW.

The more you work with MIDI, the more natural it becomes — and the more your audio recordings stop being dead ends and start being editable musical material.

How to Convert MP3 to MIDI with AI: A Complete Guide for Musicians

朱智勇 — Sat, 08 Aug 2026 00:41:07 +0000

Converting audio recordings into editable MIDI notes used to be tedious manual work. AI has changed that.

Whether you're a songwriter trying to transcribe a melody you hummed into your phone, a producer wanting to repurpose a piano part, or a student practicing transcription, converting MP3 to MIDI is now something you can do in minutes—right in your browser, for free.

Why Convert MP3 to MIDI?

An MP3 file is a recording: a waveform that captures the sound. A MIDI file is musical data: it stores note pitch, timing, duration, and velocity. Converting MP3 to MIDI is the process of listening to the audio and transcribing those notes into editable MIDI data.

This matters because MIDI is infinitely editable:

Move, resize, join, or delete individual notes
Change the tempo or key without re-recording
Export to any DAW (Ableton, Logic, FL Studio, Reaper, Cubase)
Print sheet-music-style notation from the note data

How AI MP3 to MIDI Conversion Works

Modern MP3-to-MIDI converters use machine-learning models trained on thousands of hours of music. The model listens for note onsets, sustained pitches, and polyphony (multiple simultaneous pitches).

The output is a piano-roll style preview where each detected note is shown as a block you can click and edit.

What works best

AI transcription works remarkably well on single-instrument audio:

Voice and humming
Piano
Guitar
Bass
Other solo pitched instruments

Full-band mixes are harder. Drums, vocals, bass, chords, and effects overlap, and a dense mix is harder for the model to separate cleanly. Think of the result as a starting point for a sketch, not a finished transcription.

Step-by-Step: Convert MP3 to MIDI Online

Here's how to convert an MP3 to MIDI in your browser using MP3 to MIDI, a free tool that runs entirely on your device—no signup, no upload, your audio never leaves your computer.

Step 1: Upload your MP3

Visit mp3tomidi.io and drop an MP3 file (up to 20 MB / 3 minutes) into the upload area. Because everything runs locally, there's no wait for a server and no privacy risk.

Step 2: Choose the closest audio type

Select the preset that best matches your recording: voice, piano, guitar, bass, another solo instrument, a full song, or "Not Sure." The preset tunes detection sensitivity for that instrument type.

Step 3: Preview and edit the notes

The tool shows the original audio next to a piano roll of detected notes. You can adjust pitch and timing of individual notes, change detection sensitivity, increase minimum note length to remove short false detections, or enable pitch bends for expressive vocals or guitar.

Step 4: Download your MIDI

Export a standard .mid file and open it in your DAW or notation software to continue refining.

Tips for Better Results

Start with clean audio — little noise, distortion, or reverb transcribes best
Try a short section first — a 30-second clip is faster to check than a full 3-minute track
One instrument at a time — mono transcription of a single voice or instrument beats a dense mix
Match the preset to the recording — the right preset improves detection noticeably
Treat it as a starting point — automatic transcription is a time-saver, but your ears are still the final judge

Common Questions

Can any MP3 be converted to MIDI?
The tool accepts standard MP3 files up to 20 MB and 3 minutes. Clear solo melodies transcribe more cleanly than dense mixed songs.

Does it support chords and polyphonic audio?
Yes—it can detect multiple pitches at the same time. It still works best on one instrument at a time.

Is my MP3 uploaded to a server?
No. In browser-based tools like MP3 to MIDI, the audio is decoded and analyzed entirely on your device.

What's the difference between MP3 and MIDI?
MP3 is recorded sound. MIDI is editable note instructions (pitch, timing, duration, velocity). Converting MP3 to MIDI transcribes the notes; it doesn't preserve the original voice or instrument tone.

Can it separate a song into individual tracks?
No. It produces MIDI note data from the audio you provide; it doesn't do stem separation into separate drum/bass/guitar/vocal tracks.

Start Converting Today

Free MP3-to-MIDI transcription in your browser is a game-changer for musicians who want to capture ideas fast and keep them editable. Give it a try with a short, clear recording first, and you'll see how quickly AI can turn an audio idea into music you can edit.

This guide was written for musicians, songwriters, producers, and students who want to work with MIDI without the tedious manual transcription grind. Built by the team behind MP3 to MIDI.

Building a Small SEO Guide Site for an Upcoming Game

朱智勇 — Thu, 25 Jun 2026 07:51:05 +0000

Building a Small SEO Guide Site for an Upcoming Game

I’m currently testing a small SEO project: a niche guide site for an upcoming game called Stupid Never Dies.

Instead of building a broad gaming blog, I’m trying a narrower approach. The site focuses on one game and creates separate pages for different search intents, such as release date, PS5 information, characters, combat styles, bosses, and companions.

Why This Type of Site

Large gaming keywords are difficult for a small new website. A new or upcoming game can be easier to test because the search demand is still developing.

The main idea is:

one page for one core keyword
avoid mixing too many search intents into one page
keep facts conservative when official information is limited
use Google Search Console to decide what to expand next
build internal links between related pages

Example Topic

Stupid Never Dies is planned for PlayStation 5 and PC via Steam. It has a punk zombie action RPG style, with Davy, Julia, monster forms, Body Hack upgrades, combat styles, and boss encounters.

Because the game is still upcoming, many details are not confirmed yet. That makes content accuracy important. I try not to write things like file size, performance mode, or pre-order details unless they are officially confirmed.

What I’m Watching

The most useful data so far is not traffic volume, but early search queries.

If Google starts showing impressions for a query like “stupid never dies ps5,” that tells me a PS5-focused page may be worth building. If searches around “Julia” or “Davy” appear repeatedly, the characters page may need more detail.

Here is the site I’m working on:

https://stupidneverdies.org/

It’s still small, but it has been useful as a real test of niche SEO, content structure, internal linking, and search intent.