You can convert your MIDI file to MP3 format without using specialised conversion software by using Audacity, a free audio editor. Audacity is a robust, powerful open-source audio recorder and editor that can do far more than you’d expect from a free programme.
1. Launch Audacity. If you don’t already have it, you can download from
2. Configure your outputs and inputs. Check where the audio is being sent in your MIDI recorder or DAW. Your Audacity input should correspond to your MIDI recorder’s outputs.
Your MIDI recorder outputs can be found in the audio preferences of that application.
Select an option from the drop-down menu next to the microphone icon in Audacity.
3. Select your output mix. Choose mono or stereo, as desired, from the drop-down menu next to the speaker icon.
4. Examine your levels. Toggle Audacity into Record Ready mode, press Pause (the two vertical blue lines), then Record (the red dot). Play your MIDI file, and then adjust the input level (the slider next to the microphone) in Audacity so that the level metres rarely touch 0.
5. You should record your music. When you’re happy with the levels, rewind your MIDI file to the beginning, then press the Record button in Audacity, followed by the Play button for your MIDI file. On the Audacity track, you should see audio waves forming.
6. Stop the recording. When the song has finished playing, click the yellow Stop button in Audacity, followed by the stop button in your MIDI playback software.
7. Verify your file. Click the green Play arrow in Audacity, and listen to your song to make sure everything is as you wish it.
8. You should export your song. Select Export…” from the File menu, and in the resulting export window, name your file and choose MP3 Files from the drop down menu.
You can also select WAV, AIFF, WMA, and a variety of other output formats—select the one that best meets your needs.
9. Enjoy your new file!
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