Free online 3GP to MID converter

A phone recording may be in 3GP, while a sequencer, keyboard, or ringtone editor needs MIDI note events in a MID file. Converting it requires estimating the notes from the recording; MID cannot store the original audio waveform.

What the 3GP format is

3GP is a multimedia container commonly used by mobile phones for recordings and video clips. Its audio may use codecs such as AMR or AAC, and a 3GP file can contain audio alone or audio with video.

What the MID format is

MID files store MIDI instructions such as note pitches, timing, and instrument assignments, rather than recorded sound. They are useful for editing notes in a sequencer or playing a part on a MIDI-compatible device; their small size comes from storing performance instructions instead of audio.

How to convert 3GP to MID

Online on 101convert.com

1. Open the 3GP-to-MID converter page on 101convert.com and upload the 3GP file.
2. For a batch, add the other files as well. Check the per-file size limit shown on the page.
3. Start the conversion, then download the resulting MID file.

Offline with desktop software

For an open-source workflow, use FFmpeg to decode the audio and Spotify’s Basic Pitch to transcribe it. Install both, then run these commands in a terminal:

1. Convert the recording to a mono WAV file: ffmpeg -i input.3gp -ar 22050 -ac 1 input.wav
2. Run transcription: basic-pitch output input.wav. Basic Pitch writes a MIDI file in the output directory.

Use the actual filename in place of input.3gp. FFmpeg must be able to decode the audio stream in the recording.

Quality and limitations

This is audio-to-MIDI transcription, not a lossless format change. The output estimates pitches and note timing, so it can contain missed or incorrect notes, especially with speech, noisy audio, drums, or overlapping instruments. It does not retain the original voice, instrument timbre, or other sound; playback uses the instrument selected by the MIDI player.