Audio Conversion
Convert RA to M4A Online — Free
Fast, free RA to M4A converter. No registration required.
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200万以上のファイル変換
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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 .ra 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 .m4a file when it's ready.
RAとは？
RealAudio is an audio format developed by RealNetworks for streaming. While less common today, legacy RA files are still found in archived media content.
形式の詳細
- 正式名称
- RealAudio
- 拡張子
- .ra
主な特徴
- Streaming format
- Legacy media
- Low bitrate
- Web streaming
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
RAとM4Aの比較
| 特徴 | RA | M4A |
|---|---|---|
| 正式名称 | RealAudio | MPEG-4 Audio |
| 拡張子 | .ra | .m4a |
| 最適な用途 | Streaming format | Better than MP3 |
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 RA and M4A 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.