Free online WMA to MUSICXML converter

WMA stores recorded sound, while MUSICXML stores written musical notation, so this conversion is needed when an audio recording must be edited as a score in MuseScore, Sibelius, Finale, or another notation program. It is not a direct format change: the audio must first undergo automatic or manual music transcription.

What the WMA format is

WMA, or Windows Media Audio, is a compressed audio format developed by Microsoft for music, voice recordings, streaming, and downloaded media. Windows Media Player, Windows Media Encoder, older Windows phones, and some legacy recording applications commonly create WMA files.

A WMA file contains sampled audio, not notes, measures, clefs, durations, or key signatures. Even lossless WMA does not contain notation data; it only preserves the recorded waveform more accurately than lossy WMA.

What the MUSICXML format is

MUSICXML is an XML-based interchange format for symbolic music. It represents notes, rests, voices, rhythms, dynamics, articulations, lyrics, instruments, measures, and basic layout information.

Notation applications such as MuseScore, Finale, Sibelius, Dorico, and many library-management tools can import or export MUSICXML. The format is useful when a score must be edited, transposed, re-engraved, archived, or transferred between notation programs.

MUSICXML cannot preserve the original recording, microphone effects, expressive timing, or unpitched environmental sound. It describes an interpretation of the audio as notation.

How to actually convert WMA to MUSICXML

Recommended desktop workflow

1. Decode the WMA file to WAV. FFmpeg provides a reliable intermediate format. Run:
   ffmpeg -i input.wma -ac 1 -ar 44100 -c:a pcm_s16le transcription.wav
   Mono WAV reduces processing complexity; 44.1 kHz, 16-bit PCM is suitable for most transcription tools.
2. Transcribe the audio to MIDI. Use an audio-to-MIDI recognizer such as WIDI Recognition System, or another music-transcription application that accepts transcription.wav. Set the tempo or time signature manually if the software offers those controls, then save the result as transcription.mid.
3. Open the MIDI file in MuseScore. Select File → Open and choose transcription.mid. In the MIDI import options, choose the correct quantization resolution, split tracks by instrument when appropriate, and disable unnecessary humanization if the source has a steady tempo.
4. Correct the imported notation. Check the key signature, tempo, time signature, tuplets, ties, rests, beaming, enharmonic spelling, voice assignments, and instrument ranges. Automatic transcription commonly creates extra short notes and incorrect rhythmic divisions.
5. Export MUSICXML. In MuseScore, choose File → Export, select MusicXML, and save as transcription.musicxml or the compressed transcription.musicxml.gz format if the receiving application supports it.

You can also try the free converter on 101convert.com without installing software. For this particular conversion, the service must perform audio-to-notation recognition; a normal audio-format converter cannot create meaningful MUSICXML from WMA.

When the recording contains a single melody

Monophonic vocals, flute, whistle, or a clearly isolated lead instrument usually produce better results than full mixes. Trim silence, remove reverb where possible, and provide a recording with a stable tempo before running recognition.

Quality and compatibility limitations

Automatic transcription estimates pitch and rhythm from the waveform; it does not recover the score used to perform the recording. Chords, overlapping instruments, drums, legato vocals, vibrato, rubato, reverberation, background noise, and changing tempo can cause wrong notes or measures.

Lossy WMA encoding may obscure attacks and high-frequency harmonics, making pitch detection less reliable. Converting WMA to WAV changes the container and encoding, but does not restore information already removed by compression.

MIDI import settings affect the final MUSICXML more than the WMA extension does. Review the score in the target notation program after export because different applications interpret voices, tuplets, repeats, lyrics, and page-layout data differently. If the WMA contains speech, sound effects, or a dense performance, manual transcription may be required because no valid conventional score can be inferred automatically.