HTML5中支持的音頻格式是什麼？

HTML5音頻格式支持因瀏覽器而異，最常用格式包括：1. MP3（.mp3，audio/mpeg，所有主流瀏覽器均支持，兼容性最佳）；2. WAV（.wav，audio/wav，支持較好但文件大，適合短音頻）；3. OGG（.ogg/.oga，audio/ogg，Chrome、Firefox、Opera支持，Safari和IE不支持，開源免費）；4. AAC（.aac/.m4a，audio/aac，Safari、Chrome、Edge支持，Firefox支持有限，常用於蘋果設備）。為確保兼容性，應在

HTML5 supports several audio formats, but the exact formats depend on the web browser being used, as there is no universal standard supported by all browsers. The most commonly supported audio formats in HTML5 are:

1. MP3

• File extension : .mp3
• MIME type : audio/mpeg
• Browser support : Widely supported in all major browsers (Chrome, Firefox, Safari, Edge, Opera).
• Notes : Proprietary format, but due to its popularity and hardware support, it's the most universally compatible option.

2. WAV (Waveform Audio File Format)

• File extension : .wav
• MIME type : audio/wav or audio/wave
• Browser support : Good support in Chrome, Firefox, Safari, Edge.
• Notes : Uncompressed format, so files are large. Best for short sounds or high-quality audio where file size isn't a concern.

3. OGG (Ogg Vorbis)

• File extension : .ogg or .oga
• MIME type : audio/ogg
• Browser support : Well supported in Chrome, Firefox, Opera. Not supported in Safari or Internet Explorer.
• Notes : Open, royalty-free format. Often used when targeting open-source or cross-platform compatibility.

4. AAC (Advanced Audio Coding)

• File extension : .aac , .m4a
• MIME type : audio/aac , audio/mp4
• Browser support : Supported in Safari, Chrome, and Edge. Limited support in Firefox.
• Notes : Commonly used in Apple ecosystems. Often delivered within an MP4 container.

How to Use Multiple Formats in HTML5

Because browser support varies, it's best to provide multiple sources within the <audio></audio> element so the browser can choose the first compatible format:

 <audio controls>
  <source src="audio-file.mp3" type="audio/mpeg">
  <source src="audio-file.ogg" type="audio/ogg">
  <source src="audio-file.wav" type="audio/wav">
  Your browser does not support the audio tag.
</audio>

In this example:

• The browser checks each source in order.
• It uses the first one it supports.
• The fallback text appears if none are supported.

Summary of Browser Support (as of recent versions)

✅ = Supported, ⚠️ = Partial support, ❌ = Not supported

For maximum compatibility, use MP3 as the primary format and include OGG as a fallback for open-source environments. WAV is useful for short clips, and AAC is ideal if targeting Apple devices.

Basically, you should provide at least MP3 and OGG to cover most users.

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