Convert MIDI to WMA — Free Online Converter
Convert Standard MIDI File (.midi) to Windows Media Audio (.wma) online for free. Fast, secure audio conversion with no watermarks or registration....
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How to Convert
Upload your .midi file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .wma file when it's ready.
About MIDI to WMA Conversion
MIDI (.midi) files continue to serve as the standard interchange format between music creation tools — when a composer moves a project from Sibelius to Logic Pro, from MuseScore to Cubase, or from an algorithmic composition script to a DAW, the .midi file carries the complete musical content in a universally understood format. The .midi extension is particularly common in institutional and enterprise environments where formal file naming conventions favor complete extensions.
WMA (Windows Media Audio) is Microsoft's proprietary audio codec family, encompassing WMA Standard (lossy), WMA Professional (high-resolution lossy), and WMA Lossless. Converting MIDI to WMA renders the composition through software synthesis and encodes it in Microsoft's codec for deployment within Windows-centric enterprise infrastructure where WMA is the standardized audio format.
Why Convert MIDI to WMA?
Enterprise environments standardized on Microsoft technology stacks — SharePoint for content management, Windows Media Services for streaming, System Center for deployment — often mandate WMA as the audio format for consistency and management simplicity. When these organizations need custom audio content (training narration intros, corporate event music, branded hold music) composed as MIDI, WMA is the required delivery format.
Automotive infotainment systems in vehicles from certain manufacturers (particularly those using Windows Automotive or Microsoft Connected Vehicle Platform) may prioritize WMA playback. Custom MIDI compositions for in-vehicle alerts, startup sounds, or branded audio experiences must be delivered as WMA for certified compatibility with these platforms.
Common Use Cases
- Rendering MIDI-composed corporate training intro music to WMA for SharePoint media libraries
- Converting MIDI brand jingles to WMA for Windows-based enterprise content management systems
- Producing WMA hold music from MIDI compositions for Microsoft Skype for Business phone systems
- Creating WMA audio from MIDI for automotive infotainment systems using Windows Automotive platform
- Delivering MIDI-rendered custom alerts as WMA for Windows-based digital signage management systems
How It Works
FFmpeg synthesizes the .midi event stream through a SoundFont engine to produce stereo PCM audio. The PCM is encoded using the wmav2 codec (Windows Media Audio v2), which applies a modified discrete cosine transform (MDCT) with psychoacoustic bit allocation at the target bitrate. The encoded stream is packaged in an ASF (Advanced Systems Format) container with a Global Header Object (containing file properties, stream properties with WMA-specific format data, and content description) and a Data Object containing timestamped WMA data packets.
Quality & Performance
WMA Standard at 192 kbps provides transparent quality for synthesized MIDI content — encoding artifacts are inaudible. However, WMA's compression efficiency lags behind modern codecs: AAC achieves equivalent quality at 128-160 kbps, and Opus at 96-128 kbps. The SoundFont quality remains the dominant factor. For corporate audio, use clean, professional-sounding SoundFonts with modest reverb — corporate content should sound polished, not dramatic.
Device Compatibility
| Device | MIDI | WMA |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Recommended Settings by Platform
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Tips for Best Results
- 1Use 192 kbps WMA Standard for transparent quality in enterprise audio applications
- 2Embed complete ASF metadata (title, artist, album, copyright) for proper display in Windows Media Player and SharePoint
- 3Test WMA playback on the target enterprise system before batch processing — SharePoint versions and Windows Media Services configurations vary
- 4Consider FLAC instead of WMA for Windows 10+ environments where lossless quality is needed — native FLAC support eliminates the WMA quality compromise
- 5For cross-platform enterprise scenarios, produce both WMA (for Windows infrastructure) and M4A (for Apple devices) from the same MIDI source
MIDI to WMA serves Microsoft-centric enterprise deployments where WMA is the mandated or preferred audio format. It is a compatibility-driven conversion rather than a quality-driven choice.