Convert RMI to Android Audio — Free Online Converter
Convert RIFF MIDI (.rmi) to Android Audio (.android-audio) 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 .m4a file when it's ready.
About RMI to Android Audio Conversion
RMI (RIFF MIDI) wraps Standard MIDI performance data inside Microsoft's Resource Interchange File Format container, adding structured metadata chunks (DISP, INFO) that plain .mid files lack. Created for the Windows Multimedia Extension APIs, RMI is recognized only by legacy Windows audio subsystems. Android Audio is an optimized audio preset targeting Android smartphones and tablets, producing OGG Vorbis or MP3 files tuned for the Qualcomm Hexagon DSP and ARM NEON SIMD extensions present in modern Android hardware.
Converting RMI to Android Audio first strips the RIFF envelope to access the enclosed MIDI stream, synthesizes it through a SoundFont engine to produce a PCM waveform, then encodes to Vorbis or MP3 at settings matched to Android's hardware decoders. The result is a mobile-ready audio file from legacy Windows MIDI content.
Why Convert RMI to Android Audio?
Android has no RIFF MIDI parser — the platform's MediaCodec framework does not recognize the .rmi extension or its RIFF container structure. Even if the enclosed MIDI data could be extracted, Android's built-in Sonivox synthesizer produces inconsistent results across manufacturers. Converting to an Android-optimized audio file eliminates synthesizer dependency and guarantees identical playback on every Android device.
Android's Qualcomm Hexagon DSP provides hardware-accelerated Vorbis decoding on Snapdragon chipsets, while Samsung's Exynos processors use dedicated audio DSP blocks for MP3 and OGG. Targeting Android Audio ensures the output leverages these hardware decoders for minimal battery drain during playback.
Common Use Cases
- Playing legacy Windows RIFF MIDI audio on Android smartphones without synthesizer dependencies
- Converting corporate Windows kiosk MIDI content for Android-based digital signage deployments
- Migrating legacy .rmi ringtone collections to Android-compatible audio files
- Rendering RIFF MIDI game soundtracks for Android game ports
- Preparing Windows-era MIDI compositions for streaming on Android music players
How It Works
FFmpeg reads the RIFF container, extracts the enclosed MIDI data, and routes it through a FluidSynth-based software synthesizer loaded with a General MIDI SoundFont. The rendered PCM audio is then encoded to OGG Vorbis (libvorbis, quality 5 ~160 kbps VBR) or MP3 (libmp3lame, 192 kbps CBR) depending on the Android Audio preset profile. Vorbis is preferred for Android because it receives hardware decode acceleration on Qualcomm and MediaTek SoCs, reducing CPU overhead and battery consumption.
Quality & Performance
Output quality depends primarily on the SoundFont used during MIDI synthesis, not the Android encoding step. A high-quality GM SoundFont (FluidR3_GM, MuseScore_General) produces rich instrument timbres that the Vorbis encoder preserves faithfully at quality 5. The Android-optimized encoding adds no perceptible degradation beyond what the synthesis step introduces. Battery-efficient hardware decoding does not affect audio fidelity.
Device Compatibility
| Device | RMI | Android Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| 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 OGG Vorbis for Android — it receives hardware DSP acceleration on Qualcomm Snapdragon and MediaTek Dimensity chipsets
- 2Load a high-quality SoundFont before conversion since the synthesis step determines final musical quality
- 3Add Vorbis comment metadata (title, artist) during conversion for proper display in Android music apps
- 4Test on both Qualcomm and Samsung devices to verify consistent playback across hardware decoder implementations
- 5Keep the original RMI files as source for future re-rendering with improved SoundFonts
RMI to Android Audio bridges legacy Windows MIDI with modern Android hardware. The SoundFont determines musical quality; the Android preset ensures battery-efficient hardware-accelerated playback.