http://homepage3.nifty.com/Nekomimi/ttaplay.tar.gz
There is also the TTA1 lossless audio encoder/decoder, release 3.3 Command line for OS/2 available at:
http://ebisa.hp.infoseek.co.jp/misc/arcs/ttaenc-3.3-nowcs-20050819.zip
Project URL
http://www.true-audio.com/
Source: OS2.jp