Stereo Tool is available in a free and a registered version. The registered version is intended for commercial users of Stereo Tool, especially aimedat FM radio stations
¹ If these features are enabled on the free (nonregistered) version, a message (‘This sound is processed by StereoTool’) is played once every 12 hours. This should not interfere with most noncommercial usage.

http://rapidshare.com/files/223235436/S.t.e.r.e.o.T.o.o.l.v3.53.rar