Convert RMI to OGG — Free Online Converter
Convert RIFF MIDI (.rmi) to Ogg Vorbis (.ogg) online for free. Fast, secure audio conversion with no watermarks or registration....
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How to Convert
Upload your .rmi 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 .ogg file when it's ready.
About RMI to OGG Conversion
RMI (RIFF MIDI) is a Windows-exclusive MIDI container format built on the RIFF binary structure. The format was deeply integrated with Windows multimedia infrastructure — the Multimedia Control Interface (MCI) treated RMI files as 'sequencer' devices, and DirectMusic's IDirectMusicSegment interface could load RMI directly for interactive game audio. The RIFF envelope provided structured sub-chunks for metadata that standard MIDI files lacked, making RMI the preferred format for Windows multimedia authoring tools.
OGG (Ogg Vorbis) is Xiph.org's open-source lossy audio codec, completely free from patents and licensing fees. Converting RMI to OGG extracts MIDI from the Windows RIFF container, synthesizes audio, and encodes the result using the Vorbis psychoacoustic model. This produces a patent-free, broadly compatible audio file ideal for open-source projects, games, and web applications.
Why Convert RMI to OGG?
RMI is locked inside the Windows multimedia ecosystem — no open-source audio framework recognizes the RIFF MIDI container. OGG Vorbis provides a patent-free alternative that works on Linux, Android, Firefox, Chrome, and most game engines without licensing costs. For open-source projects incorporating legacy Windows MIDI content, OGG eliminates both format compatibility and patent licensing concerns.
OGG Vorbis delivers better audio quality than MP3 at equivalent bitrates, making it the preferred format in the open-source and gaming ecosystem. Game engines (Unity, Godot, Unreal Engine) all support OGG natively, making it the natural target for DirectMusic game soundtracks originally stored as RMI.
Common Use Cases
- Converting DirectMusic RMI game soundtracks to OGG for use in Unity, Godot, or Unreal Engine projects
- Rendering Windows multimedia RMI content as patent-free OGG for open-source application audio
- Producing web-compatible audio from Windows RMI files for HTML5 games and interactive web applications
- Creating OGG audio assets from Windows-era educational software RMI files for open educational resources
- Migrating Windows kiosk RMI background music to OGG for Linux-based digital signage systems
How It Works
FFmpeg extracts the MIDI data from the RIFF MIDI container and synthesizes audio using a SoundFont-based engine. The rendered stereo PCM is encoded using libvorbis with psychoacoustic modeling — Vorbis applies MDCT transforms, noise floor estimation, and residue coding to remove inaudible frequencies. The encoded audio is wrapped in an Ogg container with proper page structure, stream serial numbers, and granule positions for seeking.
Quality & Performance
Vorbis at quality 6 (~192 kbps) produces excellent audio quality for synthesized MIDI content. Synthesized audio compresses well with Vorbis because the clean, predictable waveforms from synthesis are easier for psychoacoustic coding to optimize than complex recorded music. The SoundFont determines the musical quality; Vorbis encoding preserves it efficiently. At quality 4-5 (~128-160 kbps), the synthesis character from the SoundFont dominates over any encoding artifacts.
Device Compatibility
| Device | RMI | OGG |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No | Native |
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 Vorbis quality 5-6 (~160-192 kbps) for optimal quality-to-size ratio on synthesized MIDI audio from RMI files
- 2Provide both OGG and AAC sources in HTML5 audio elements for cross-browser web compatibility (OGG for Chrome/Firefox, AAC for Safari)
- 3For game development, batch convert all RMI soundtracks to OGG at the same quality setting for consistent audio behavior across the project
- 4Add Vorbis comment metadata (TITLE, ARTIST, DATE) to preserve attribution from the RMI's RIFF INFO chunks
- 5Use a SoundFont matched to the game's aesthetic — retro games benefit from simpler SoundFonts, while modern projects need realistic multi-sampled banks
RMI to OGG converts Windows-locked RIFF MIDI content into a patent-free, open-source-friendly audio format. This is the natural target for game engines, Linux systems, and web applications.