A 128 Kbps AAC file generally sounds much better than a 128 Kbps MP3 file. Pentium 4), you can’t compare bit rates between AAC and MP3 files. Just as you can’t compare megahertz ratings across different chip families (like Pentium III vs. They sound thin and tinny compared to a file encoded at, say, 160 Kbps. When you encode an MP3 file, the transfer and compression of the audio data into the new format is measured in kilobits.įiles encoded with lower bit rate settings-like 64 kilobits per second-don’t include as much audio information from the original sound file. Geeks measure size and storage capacity in bytes, but network speeds and data-transfer speeds have always been measured in bits. So why are audio files measured in kilo bits (thousands of bits) and not the more familiar kilo bytes?įorce of habit.
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