什么是 MP3 文件？
随处可用的通用音频格式
MP3 files are one of the most common audio file formats. Almost every player on any platform can open an mp3 file. The MP3 file format is a compressed file format with an intentional loss of audio quality. However, the loss should be negligible for the typical user. It was developed by the Moving Picture Experts Group (MPEG) and uses ‘Layer 3’ audio compression.
The audio compression preserves the audio within a normal human’s hearing range, while discarding unnecessary information outside of that range. MP3 files are usually used to store music and audiobooks with ‘near-CD quality sound’ (aka Stereo at 16-bit), but due to the great compression algorithm, the file size is around 1/10th of the WAV or AIF file equivalent. The quality of an MP3 file depends largely on the compression bit rate. Common bit rates are 128, 160, 192, and 256 kbps. And higher bit rates result in higher quality files that also require more disk space. MP3 files are easily handled and transcribed by Sonix, please try to upload higher bitrate quality audio files which will improve your transcript’s accuracy.
MP3 文件的常见用途
- 音乐分发
- 播客节目
- 有声读物
- 语音录音
- 音乐流媒体
- Spotify 下载
- 播客应用
- 音乐播放器
- 录音笔
- 网络下载
谁会使用 MP3 文件？
记者、学术研究人员和口述历史工作者经常处理 MP3 采访，因为几乎每一款手持录音机和口述录音应用都能导出这种格式。它也是电台档案、课堂录制系统和通话录音服务常用的交付格式，因为这些场景需要能在任何设备上播放的小文件。
MP3 与 WAV：应该选择哪一个？
WAV 文件存储未压缩的 PCM 音频，保留完整的录制信号，但其体积大约是同等 MP3 的十倍。MP3 会永久丢弃大多数听众察觉不到的音频细节，从而保持文件小巧、便于分享和播放，但这也使它不适合用作剪辑或归档母版。录制或制作源音频时请选择 WAV；当文件大小和通用兼容性比最高保真度更重要时请选择 MP3。
将 WAV 转换为文字