Audio Conversion
Convert M4A to RMI Online — Free
Fast, free M4A to RMI converter. No registration required.
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処理後にファイルを自動削除
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すぐに変換を開始
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変換方法
1
Upload your .m4a file by dragging it into the upload area or clicking to browse.
2
Choose your output settings. The default settings work great for most files.
3
Click Convert and download your .rmi file when it's ready.
M4Aとは？
M4A is an audio-only MPEG-4 container, commonly using AAC encoding. It provides better quality than MP3 at similar file sizes.
形式の詳細
- 正式名称
- MPEG-4 Audio
- 拡張子
- .m4a
主な特徴
- Better than MP3
- Apple ecosystem
- AAC encoding
- Metadata support
RMIとは？
RMI is a Windows-specific variant of the MIDI format that wraps standard MIDI data inside a RIFF container. It was commonly used in Windows 3.1 and Windows 95 era multimedia applications.
形式の詳細
- 正式名称
- RIFF MIDI
- 拡張子
- .rmi
主な特徴
- RIFF container
- MIDI data
- Windows legacy
- Multimedia authoring
M4AとRMIの比較
| 特徴 | M4A | RMI |
|---|---|---|
| 正式名称 | MPEG-4 Audio | RIFF MIDI |
| 拡張子 | .m4a | .rmi |
| 最適な用途 | Better than MP3 | RIFF container |
よくある質問
Converting between lossless formats preserves perfect quality. When converting to lossy formats, our optimized encoding minimizes any audible difference. You can adjust bitrate to control quality vs. file size.
We preserve ID3 tags, album art, and metadata when both M4A and RMI support them. Some metadata may not transfer between incompatible formats.
Pro users can batch convert multiple audio files simultaneously. Free users convert one file at a time with up to 5 free conversions per day.
We support all standard sample rates from 8kHz (voice) up to 192kHz (studio quality). The default preserves your source file's sample rate.
Yes. Our audio converter handles music, podcasts, voice memos, and audiobook files. For podcasts, we recommend MP3 at 128-192kbps for the best balance of quality and file size.