We have added a new button to Rotation window in Siglos Karaoke Professional that allows to open Audio Panel, a collection of audio-related controls all in one place.
It gives you access to karaoke playback volume, fill-in volume, key and tempo adjustment, and lyrics advance control (this is the same as Lyrics Advance setting in Display options page). Lyrics adjustment allows you to fix songs in which lyrics and audio do not match. Also it may be used to fix the delay introduced by a sound card. By default this setting resets for every song, but you may make it stick in Settings / KJ cont.
Happy singing!