These are larger files than those of the lossy formats. Delivers a sound that's superior to Audible formats 2, 3, and 4. Uncompressed and 64 kbps, deemed to have CD-quality sound. Format 4, with a bitrate 32 kbps, has sound quality comparable to an MP3. Format 3 at 16 kbps delivers sound equal to that of an FM radio. Lossy format 2 delivers 8 kbps of sound, on a par with AM radio. Lossy format that carries up to six channels of music.Īn enhanced version of Dolby Digital that offers increased bitrates and support for more audio channels. Lossy format, and the most popular of the audio types used for digital music. Often used on audio CDs, the data isn't compressed, so the files are large, but the quality is good. The iPhone 4 is capable of playing a variety of audio formats, including MP3, MP3 VBR, WAV, AAC, protected AAC, HE-AAC, Apple Lossless, AIFF and formats. When decompressed, the audio is identical to the original. Provides lossless compression of digital audio. You can't burn these to CDs.ĭelivers no quality loss of music tracks at all. HE-AAC files are also called MPEG-4 AAC files.Īll songs sold on iTunes before 2009. A lossy format that includes Digital Right Management (DRM). HE-AAC and HE-AAC v2 (High-Efficiency Advanced Audio Coding)īoth versions are lossy compression formats good for software media players, streaming music, and internet radio. A lossy audio format optimized for streaming audio and low-bitrate applications
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