概述
WAV是用于专业录音的无压缩音频。MP3是音乐和播客中使用最广泛的有损格式。FLAC是无损压缩 - 比WAV小且没有质量损失。
理解无损（WAV、FLAC）和有损（MP3）之间的区别是正确选择的关键。
正面比较
音频质量
WAV: WAV 是无损压缩 - 完美的逐位音频，零质量损失。
MP3: MP3 使用有损压缩。在 320kbps 时，大多数人听不出差别。
Winner: WAV / FLAC（平局）
文件大小
WAV: WAV 非常大 - 一首 3 分钟的歌曲大约为 30-50MB。
MP3: MP3 非常小 - 同一首歌曲在 320kbps 时大约为 7MB。比 WAV 小 5-8 倍。
Winner: MP3
兼容性
WAV: WAV在Windows、macOS和所有专业音频软件中原生支持。
MP3: MP3 是最通用的音频格式 - 每个设备和应用程序都支持它。
Winner: MP3
元数据标签
WAV: WAV 的元数据支持有限 - ID3 标签没有本地标准化。
MP3: MP3 对 ID3 标签的支持非常出色 - 艺术家、专辑、封面、歌词等。
Winner: MP3 / FLAC
编辑
WAV: WAV 非常适合音频编辑 - 每个数字音频工作站（DAW）都原生支持它。
MP3: 不推荐使用 MP3 进行编辑 - 重新编码会增加代际损失。
Winner: WAV
Uncompressed, Lossy, and Lossless
These three occupy the three fundamental audio storage strategies. WAV stores raw, uncompressed PCM samples in a RIFF chunk structure, an exact digital recording with no encoding step.[1][2] MP3 is lossy, using a psychoacoustic model to discard masked, inaudible information for dramatic size reduction.[3] FLAC is lossless, using linear prediction and Rice coding to shrink the file while reconstructing the original samples bit-for-bit.[5][6]
File Size and Fidelity
WAV is the largest, since it applies no compression, but it preserves the signal perfectly and incurs no decode overhead.[2] FLAC delivers the same perfect fidelity as WAV at roughly half the size by removing only statistical redundancy.[5] MP3 is by far the smallest because it permanently removes audio data, which cannot be restored to the original.[4]
Editing and Compatibility
WAV's lack of encoding makes it instantly readable and editable without a decode step, which is why it is standard in recording and audio editing.[1] A practical limitation of WAV is that its original specification used 32-bit size fields, constraining individual files to roughly 4 gigabytes, an issue for very long high-resolution recordings.[2] MP3 is the most universally playable of the three; FLAC support is wide but slightly less universal, particularly on older hardware.[4]
Metadata and Standardization
FLAC and MP3 carry embedded metadata, Vorbis comments and ID3 tags respectively, including artist, album, and cover art; WAV's metadata support is more limited and less consistently implemented.[3][5] WAV was defined by Microsoft and IBM as part of the RIFF specification; MP3 within the MPEG process; and FLAC as an open, royalty-free format maintained by the Xiph.Org Foundation.[1][6]
Applications
WAV is preferred in recording and editing where an unencoded, instantly accessible master is needed.[1] FLAC suits archiving and high-fidelity libraries that need WAV-quality audio in less space. MP3 is used for distribution, podcasts, and portable playback thanks to its small files and universal support.[4]