Nero AAC/AAC+ UI

Download Nero AAC/AAC+ UI (Windows only)

Download Nero's AAC/AAC+ encoder & decoder files needed for UI

Features

Encode WAV or FLAC files to MPEG-4 AAC/AAC+
Decode from FLAC or AAC/AAC+ to WAV
Automatic tagging of AAC/AAC+ files from FLAC files that have tags (only English character set supported at the moment)
Change the priority of AAC/AAC+ and FLAC encoder and decoder programs on-the-fly

Setup

Loading encoder & decoder files

After downloading the Nero AAC/AAC+ encoder/decoder files, click Options on the Nero AAC UI program and load Nero's AAC encoder (neroAacEnc.exe) and decoder (neroAacDec.exe) files into the following locations:

To convert FLAC files to AAC you will also need to load the flac.exe file (which you can download from here).

If you're using an Intel processor that supports SSE you can use the neroAacEnc_SSE.exe encoder file (which should be faster at encoding) instead of neroAacEnc.exe.

Quality / Bit rate

Sets the quality (between 0.0 and 1.0) or bit rate (between 0 and 425 kbps) level to use for encoding.

If the audio mode is VBR (recommended) you will be setting the quality level, and if any of the other audio modes are used you will be setting the bit rate level.

The bit rate values for different quality levels are taken from the values given on this Hydrogen Audio thread:

Approx Bit rate kbps	Quality
~15	0.05
~32	0.15
~63	0.25
~99	0.35
~146	0.45
~197	0.55
~248	0.65
~299	0.75
~350	0.85
~401	0.95

AAC

Encode WAV or FLAC files to AAC/AAC+.

Decode

Decode AAC/AAC+ or FLAC files to WAV.

Options

Brings up the Options dialog box to load the required neroAacEnc.exe/neroAacEnc_SSE.exe, neroAacDec.exe and flac.exe files; allows you to set default encoder settings; the output directory and the output file extension.

FLAC

FLAC command line options

Monkey's Audio

-c5000 stands for Insane (Slow and sometimes gives worse compression)
-c4000 stands for Extra High compression level and it's recomended
-c3000 - High
-c2000 - Normal
-c1000 - Fast

TAKC

TAKC -mode [-p# -wm# -v -overwrite -l# -w] infile [outfile]

-mode      -e encode, -d decode, -t test decode, -te test encode
-p#        select encoder preset #
             T/F/N/H/E or 0-4 for Turbo/Fast/Normal(default)/High/Extra
             Append M (-p2m) to increase the evaluation level to the maximum.
-wm#       1/0 to enable(default)/disable saving(encode)/restoring(decode) of
           non-audio wave file meta data
-v         verify encoded frames (when encoding)
-overwrite overwrite existing output files (without confirmation!)
-l#        select log file level #
             0 = no log file (default)
             1 = log results
             2 = log results and diagnostics
             Append A (-l1a) to append new results to an existing file.
-w         wait for enter key when finished
infile     specify file or directory (Dir\*) to be processed
outfile    specify output file or directory (Dir\*)

Wavpack

Wavpack command line options

Encoder type

This allows you to force the Nero AAC encoder to use one of the AAC profiles.

Recommended option: Auto

Options:

Auto (the Nero AAC encoder automatically chooses which AAC profile to use based on what quality / bit rate value is being used)
LC-AAC (low complexity AAC -- this is the standard kind of AAC used in iTunes etc used at bit rates of 80 kbps and above. This profile provides the highest audio quality at these bit rates -- AAC+ does not provide higher audio quality than standard AAC at bit rates higher than about 80 kbps.)
HE-AAC (high-efficiency AAC -- also known as AAC+ -- this is a more efficient AAC profile used at very low bit rate levels)
HE-AACv2 (HE-AAC version 2 -- also known as AAC+ -- this is a more efficient AAC profile used for extremely low bit rate levels.)

Audio mode

This allows you to choose which kind of bit rate mode to use for encoding.

Recommended option: VBR