How to Convert a MID to an MP3
Files with the MID extension are musical sequences created using MIDI keyboards or composition programs. In order to play a MID file, a computer generally needs to have an onboard synthesizer chip. While most sound cards have these, they vary greatly in quality, making the MID format impractical for distributing music online. Improve the sound quality of a MID file and prepare it for online distribution using a free web-based conversion tool.
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Instructions
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Browse to the Online MIDI to MP3 Converter website using the link in the "Resources" section of this article. Click the "Browse" button, navigate to the location of the MID file on your computer, then double click it.
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Select a sample width for the converted MP3 file. For example, 24-bit samples sound best, but require a 24-bit sound card to play back and result in a very large file. In most cases, 16-bit samples are the appropriate choice.
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Select mono or stereo sound. In most cases, you should choose stereo.
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Select an instrument set. This is the set of MIDI instruments used to render the MID file as an MP3. Click the MP3 samples at the top of the page for help deciding which instrument set sounds best for your song.
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Select whether you would like to use anti-aliasing. In most cases, this results in a better-sounding conversion to MP3.
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Adjust the volume level, transposition and tempo of the song if desired. Unless you are converting a MID file to use as a backing track for karaoke, these selections are best left alone. These selections are primarily useful for adjusting a song to suit a particular singer's voice.
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Select a bit rate for the completed MP3 file. A higher bit rate will result in a better-sounding, but larger file; 192 Kbps or higher is recommended.
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Click "Convert File." After a moment, a download link will appear. Click "Download Your MP3" to download the converted file.
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Tips & Warnings
The MIDI to MP3 Converter also allows MID files to be converted to WAV files. A WAV file can be burned directly to a CD with no loss in quality.
