OpenRCT2

Table of Contents

Compression methods
Names
Other files

Lossless audio compression saves space compared to the original RCT2 WAV files. No audio data is lost; it is simply stored more efficiently.

The RCT2 audio is stored without much metadata. Data about original composers, performing artists, and the title of each piece of music can be added to the RCT2 music. For an implementation of these suggestions, check this project.

Compression methods

All three of these have very similar compression ratios.

The RCT2 soundtrack stored as FLAC is 58% of its original size, to 251 MB from 436 MB.
TAK works perfectly and can restore the WAVs to checksum-identical original files, but it's not natively cross-platform and it's not available under the GNU General Public License.
WavPack has near-identical compression results to TAK or FLAC, while remaining in WAV format. Neither FLAC nor WavPack can restore the WAVs to what they were like TAK can.

Names

All tracks have names: both "_____ style" and an even more official name (check the sound credits). We have heard from the composer for the RCT2 soundtrack that our track listing is correct. This listing is consistent with the MusicBrainz tagging style.

Filename	Style name	Official name
css3.dat	Dodgems beat style	Dodgems beat
css4.dat	Fairground organ style (1)	Children of the regiment (Die Regimentskinder; Julius Fučík)
css5.dat	Fairground organ style (2)	Serenade, op. 21 (Jonny Heykens)
css6.dat	Fairground organ style (3)	In Continental Mood (anonymous)
css7.dat	Fairground organ style (4)	Wedding Journey (Traumfahrt; traditional)
css8.dat	Fairground organ style (5)	Tales from the Vienna Woods (Johann Strauss jr.)
css9.dat	Fairground organ style (6)	Slavonic Dance (traditional)
css11.dat	Fairground organ style (7)	Das Alpenhorn (traditional)
css12.dat	Fairground organ style (8)	Bella Bella Bimba (tradtional)
css13.dat	Fairground organ style (9)	The Blond Sailor (traditional)
css14.dat	Fairground organ style (10)	Poet & Peasant Overture (Franz von Suppé)
css15.dat	Fairground organ style (11)	Waltz Medley (medley of waltzes from Johann Strauss jr.)
css17.dat	(none)	(Title music)
css18.dat	Roman fanfare style	Caesar's March
css19.dat	Oriental style	Ninja's Noodles
css20.dat	Martian style	Invaders
css21.dat	Jungle drums style	Jungle juice
css22.dat	Egyptian style	Pharaoh's Tomb
css23.dat	Toyland style	Eternal Toybox
css24.dat	(none)	(Circus show)
css25.dat	Space style	Voyage to Andromeda
css26.dat	Horror Style	Vampire's Lair
css27.dat	Techno Style	Brimble's Beat
css28.dat	Gentle Style	Drifting to Heaven
css29.dat	Summer Style	Mid Summer's Heat
css30.dat	Water Style	Atlantis
css31.dat	Wild West Style	Wild West Kid
css32.dat	Jurassic Style	Blockbuster
css33.dat	Rock Style	Airtime Rock
css34.dat	Ragtime Style	Searchlight Rag (written by Scott Joplin)
css35.dat	Fantasy Style	Flight of Fantasy
css36.dat	Rock Style 2	Big Rock
css37.dat	Ice Style	Hypothermia
css38.dat	Snow Style	Last Sleigh Ride
css39.dat	Medieval Style	Pipes of Glencairn
css40.dat	Urban Style	Traffic Jam
css41.dat	Organ Style	Toccata (written by Charles-Marie Widor)
css42.dat	Mechanical Style	Manic Mechanic
css43.dat	Modern Style	Techno Torture
css44.dat	Pirates Style	What shall we do with the Drunken Sailor (traditional)
css45.dat	Rock Style 3	Space Rock
css46.dat	Candy Style	Sweat Dreams (sic!)

Other files

css1 is a special WAV for sound effects.
css2 contains the long "crowd" sound effect.
css10 and css16 are nearly empty, and are probably unused. The rest are seemingly just WAV files named as DATs. Check the header: RIFF %. WAVEfmt.
css35 is titled "MPEG-1 layer III audio" and though its bitrate is high (488 kbps as FLAC), it's possible that it was transcoded from MP3.