dBpoweramp m4a Help

dBpoweramp m4a FDK (AAC) Encoder
This m4a Encoder creates m4a files encoded with AAC.
Supported by this Codec

- Encoding: Yes [.m4a (AAC)] Requires dBpoweramp reference
- Multi-processor Encoding: Yes (with dBpoweramp reference)
- Decoding: No
- Gapless Encoding: Yes

Compression Options

The encoding can either be constant bitrate, or Variable bitrate (only standard sample rates, LC encoding and channels supported). For bitrates below 48kbps HE v2 profile is used, below 96kbps HE is used and LC profile for all other birates.

Command Line

dBpoweramp Reference allows compressions from the command-line, commands specific to this codec:

> -bitrate [level] set encoding bitrate

> Example: "c:\program files\illustrate\dBpoweramp\coreconverter.exe" -infile="c:\afile.wav" -outfile="c:\outfile.m4a" -convert_to="m4a FDK (aac)" -bitrate 128

Terminology

> Encoding: compress and write an audio file,
> Decoding: uncompress, or read an audio file,
> ID Tags: meta data such as artist & album are embedded inside the audio file,
> Lossless: compression without audio quality loss,
> Lossy: audio quality is sacrificed (how much depends on bitrate and codec used) to achieve smaller files,
> Gapless: allows the decoder to decode audio stream without gaps (silence),
> Explorer Audio Popup: a dBpoweramp function, hold the mouse over a supported audio file and details contained are displayed,
> Multi-processor Encoding: for dual processor, or multi core processors multiple files can be compressed at once fully using both (or more) CPUs.
> Command Line: text interface, where commands are typed (start >> run >> cmd to get to the command line)

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