[[https://archive.org/details/jp.justsystem.beatjam| Archive.org resource]] 
 [[https://mega.nz/file/HFlQAI4I#iP8SedoINnc6qOoAc338QdtCy54U1TqDfJB2b9fojhg| ISO Mega Link v1.2.3.0]] {{ :software:beatjamnetmddrivers.zip | BeatJam NetMD Drivers}}

Beatjam started as a separate piece of software but was adapted to add netmd functionality. The rabbit hole goes deep.

Beatjam (at least some versions) [[https://support.justsystems.com/faq/1032/app/servlet/qadoc?QID=051412| supports conversion from ATRAC to other formats]], including in batch jobs.

At least one update can [[https://support.justsystems.com/faq/1032/app/servlet/qadoc?QID=052136| be found here]], possibly a good source for others as well

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News / Press Releases of features and versions of BeatJam:

https://av.watch.impress.co.jp/docs/20060116/dal219.htm
https://av.watch.impress.co.jp/docs/20051214/just.htm
https://av.watch.impress.co.jp/docs/20051207/just.htm
https://av.watch.impress.co.jp/docs/20050418/just.htm
https://av.watch.impress.co.jp/docs/20050405/just.htm
https://av.watch.impress.co.jp/docs/20010214/just.htm

https://web.archive.org/web/20050623004532/http://www3.justsystem.co.jp/download/beatjam/up/win/020513.html