fpMP3Enc is a multithreaded version of LAME that uses the Fiber Pool multi-threaded framework to take advantage of modern multi-core CPUs.
Uses LAME version 3.98.2. Includes x86 and x64 compiles for Windows. Also includes a multithreaded FLAC encoder.

The license of this software is Freeware, you can free download and free use this audio converter software.