The .SAP (Slight Atari Player) Format is a file that contains music data for the Atari POKEY sound chip. 

There are a whole bunch of tools that can play .SAP files. ASAP and SAP Player are two popular examples (there's a whole list of them '[l[http://asma.atari.org/[Here] ).

You can make .SAP files in Windows using '[[Raster Music Tracker] or '[[XPMCK].

Alternatively, if you prefer to track on real hardware (or emulating), you can try the following programs:
- '[l[https://atarionline.pl/utils/3.%20Muzyka/Chaos%20Music%20Composer/Chaos%20Music%20Composer%20v2.2%20%282015-06-03%29%28L.K.%20Avalon%29%28PL%29%28en%29%5Bh%20Marek%20Sasnal%5D.xex?PHPSESSID=hoptvvq9upq4vm8p7jekks66j1[Chaos Music Composer]
- '[l[https://atarionline.pl/utils/3.%20Muzyka/Music%20ProTracker/Music%20ProTracker%202.4s%2B.xex?PHPSESSID=hoptvvq9upq4vm8p7jekks66j1[Music ProTracker]
- '[l[https://atarionline.pl/utils/3.%20Muzyka/Theta%20Music%20Composer/Theta%20Music%20Composer%20v2.0h%20%282004-12-10%29%28Lewandowski%2C%20Marcin%29%28PL%29%28en%29%5Bstereo%5D.xex?PHPSESSID=hoptvvq9upq4vm8p7jekks66j1[Theta Music Composer]

The .SAP format only allows 4 channel (mono) mode. Stereo mode is a hack, so battle entries that use this should therefore be submitted in '[l[http://battleofthebits.com/lyceum/View/sapx2%20(format)[sapx2] or Wildchip catagories.