LAME MP3 Encoder 3.99.5 (64-bit)

LAME MP3 Encoder 64-bit is an open source audio encoder for Windows PC. The encoder is not a graphical application that you can double-click, but a command-line tool, usable from the Terminal application (which lives in the Utilities folder inside the Applications folder) or other graphical applications.

LAME MP3 Encoder Features:

• Many improvements in quality in speed over ISO reference software. See history.
• MPEG1,2 and 2.5 layer III encoding.
• CBR (constant bitrate) and two types of variable bitrate, VBR and ABR.
• Encoding engine can be compiled as a shared library (Linux/UNIX), DLL , Directshow filter or ACM codec (Windows).
• Free format encoding and decoding.
• GPSYCHO: a GPL'd psycho acoustic and noise shaping model.
• Powerful and easy to use presets.
• Quality better than all other encoders at most bitrates.
• Fast! Encodes faster than real time on a PII 266 at highest quality mode.
• MP3x: a GTK/X-Window MP3 frame analyzer for both .mp3 and unencoded audio files.

Note: The download is a compiled LAME MP3 binary (not a source code).