Skip to main content


Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: SuperFast LAME multi-threaded MP3 encoder (Read 4185 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

SuperFast LAME multi-threaded MP3 encoder

Hi folks,

I just published the 3rd preview release of fre:ac with my SuperFast multi-threading technology. You can download it from GitHub.

This release adds support for multi-threaded LAME MP3 encoding. It scales very well with the number of CPU cores and can achieve a 3.5x speed-up on a quad core CPU. On my i7-6900K, I was able to measure up to 12x speed-up when running with all 16 threads (in most scenarios, however, either decoding or HDD/SSD speed will be a bottleneck before going to such speeds).

Two key points distinguish SuperFast LAME from previous attempts to build multi-threaded MP3 encoders:

  • It keeps the bit-reservoir enabled in order to achieve the same quality as the original encoder.
  • It uses an unmodified LAME encoder library, so the encoder can be swapped out for your own version.

Making it work while keeping the bit-reservoir enabled was actually the greatest challenge. Here is a technical article on how this is implemented: SuperFast LAME technical details

I plan to implement this technology on top of the command line LAME frontend in the future. For now, my priority is on releasing fre:ac 1.1 beta and final versions, though.

Thanks in advance for trying the preview and posting your results and opinions!

Re: SuperFast LAME multi-threaded MP3 encoder

Reply #1

Re: SuperFast LAME multi-threaded MP3 encoder

Reply #2
Bravo! I shall try this out in the upcoming weeks and let you know of the results.