Extra plugins you may need

[Dr.Flay]

WACUP is very complete but there are a few extra file formats and input/output solutions you may need.
NOTE: Wacup already plays Shockwave Flash SWF files, so don't bother looking for a plugin.

Vorbis OPUS input plugin by BogProg Software
http://bogproghome.hopto.org/forums/viewtopic.php?f=6&t=2

AC3/DTS input plugin by AC3Filter
https://ac3filter.net/wiki/WinampAC3 (Web Archive link)
https://sourceforge.net/projects/ac3filter/files/winampac3/

RealMedia audio/video and RTSP/PNM streams input plugin by Tara
http://musiclivesonline.com/software/watara.html (Web Archive link)
https://www.free-codecs.com/download/Real_Audio_Input_Plugin_for_Winamp.htm (v1.0.3b)
Instructions say you need to install Realplayer or Realplayer Alternative.
You can use the Media Player Classic standalone RealMedia splitter instead.
https://sourceforge.net/projects/mpcbe/

OFR OptimFROG lossless audio input plugin by Florin Ghido.
http://losslessaudio.org

Weird MPEG Variants will often play back on regular MP3 decoders, but will ignore extra data.
You may need a specific plugin to hear the extra frequency bands, channels or lossless audio.
You should convert any of these files to a better supported format and disable the plugin after being used.

Thompson MP3Pro input plugin by Coding Technologies
www.codingtechnologies.com/products/mp3pro.htm (Web Archive link)
https://www.free-codecs.com/download/mp3pro_decoder_plugin_for_winamp.htm

Thompson/Fraunhofer Lossless MP3HD input plugin by Technicolor
http://all4mp3.com/learn/mp3HD.php (Web Archive link)
https://winampheritage.com/plugin/mp3hd-input-plug-in-v1-5-0/221984

[Mits]

Thanks for the info! By listing them I presume you have tested them as fully working in the December build and for portable installations too?

Since it seems you're a plugin expert, have you any idea what is the condition for a 3rd party plugin to be accepted by Wacup as legit and be listed as a candidate plugin in Preferences? I am trying to test the MAD input plugin (indispensable imho for any music player) as well as the old WASAPI-NT plugin in case it works better than the not-so-yasapi bundled, but they are not even listed as installed (and yes, I have the 'Allow 3rd party plugins'checkbox checked).

Thanks in advance for any tips!