Yunasoft is an application coming from Japan, but it is not really an MP3 encoder - actually, it is a frontend to the FhG MP3 ACM codec.

It offers several features related to tagging and whether to save output as WAV-wrapped MP3 streams or standard MP3 files.

The main difference between versions 0.4.3e and 0.7 hosted here is that 0.7 supports batch operations (encoding, and stripping the RIFF headers from WAV files). But starting with 0.7 the developer required that users register for free at their web site to obtain a registration key. Without that key, the program encodes no more than 30 seconds of audio for each file.

The registration form and the website have been gone for decades, so I am providing here a key found at a "serial numbers" page:
Mail address: UCF@UCF.com
Registration key: EDs6@5E3ARhHfmwL6mzMG8JFIQKT1iMFh
(big thanks to UNITED cRACKING FORCE for the key)

It is interesting to notice that Yunasoft version 0.7 refuses to work with the 1.0.0.48 (professional) ACM codec, but works fine with codec version 3.4. Version 0.4.3 works with both.

A mirror of the YunaSoft webpage can be visited at the Internet Archive.


Date: 1998-04-18
Version: 0.7
Interface: Graphical
Platform: Win32
Download: wav2mp307.exe - 821kB

Date: 1997-10-11
Version: 0.4.3e
Interface: Graphical
Platform: Win32
Download: wav2mp3043e.exe - 807kB