For speech 128 kbps or even 64 kbps can be used as the bit rate if preferred.Īpple Lossless (Apple proprietary, lossless, smaller than WAV/AIFF)Īpple Lossless Encoding (sometimes referred to as ALAC - Apple Lossless Audio Codec) is also an Apple proprietary format. If you choose lossy formats (MP3 or AAC) the minimum bit rate setting you should use for music is 160 kbps, though 256 kbps is probably to be preferred - and in use on an iPod is unlikely to be distinguishable from WAV or AIFF (or Apple Lossless). The two main benefits are that you can fit many more songs into the device (for 256 kbps files you can fit about 10 times as many songs) and compressed files improve battery life, because disk reads are relatively heavy on battery power. There are several advantages to using a compressed format on iPods and iPhones. If you have plenty of storage space on your device or a relatively small music library you may wish to consider the larger lossless WAV or AIFF formats.
MP3 should be considered if you think that in the future you may wish to switch to an alternative portable music player or phone. You can always convert lossless audio to a lossy format, but you can't convert lossy audio back into higher-quality lossless formats.AAC is the default format set in Apple Music/iTunes and the format Apple uses for audio files sold from the Apple Music/iTunes Store, so is the most obvious choice if you solely use Apple products. Lossless formats also allow you to future-proof your audio, should you ever acquire better equipment for listening.
That said, if storage space isn't an issue and you have high-quality speakers or headphones, a lossless format might be the way to go. As long as you don't set the bitrate too low, it's unlikely you'll be able to tell much difference between lossless and lossy audio, especially if you're listening on your phone through earbuds. Lossy formats are fine in most situations. This reduces the overall sound quality, but also makes it a much smaller file and therefore easier on your hard drive. Lossy formats use a lower bitrate, stripping out a good portion of an audio file's data.Lossless formats have all the original data intact and are therefore much bigger files.
The first step to reducing the size of audio files is to recognize whether your audio is "lossless" or "lossy". Should You Choose Lossless or Lossy Audio Compression?
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