Talk:Apple AAC

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Page discussion

Encoder bandwith and low pass filters

Just as in Fraunhofer encoder wiki, it's advisable to know apple encoder's default lowpass filters with bitrates, to be able to change defaults with --lowpass command option. Low pass filters is important to ascertain how the encoder chooses to omit high frequency information.

FFmpeg with AudioToolbox

In recent versions of FFmpeg on OS X it is possible to use the Apple encoders via AudioToolbox. AAC encoder is called aac_at. Unlike afconvert, it preserves metadata when encoding.