Covenant has released a DVD set of their Skyshaper Tour which was about 18 month touring from russia to europe and then to america (north and south). The DVD set consists of 2 DVDs and 1 CD.

DVD1: A road movie of the tour. You get impressions on how some songs were created and the ideas behind them, what the artists do when they are not on stage (I was very impressed by the sound diary of the lead singer - storing sounds instead of text or pictures) and how they clean their tour bus. Between the interviews you can see some snippets of the live concerts.

DVD2: This is called a bonus DVD but thats pure understatement. It contains 13 live songs played in Köln (germany) + 3 bonus songs from the WGT 2004 in Leipzig (germany). That DVD alone is something other bands would sell as a full priced live DVD.

CD: is a live CD but a different collection of songs than you can find on the DVD.

I was not able to find a free mp3 sample but there are a few songs on myspace.com (also known as the biggest collection of ugly homepages ever seen on earth. Really. I never saw a personal homepage there that had at least a tininess of style).
Anyway, you can hear the song 20Hz there too, which is one of my favourite Covenant songs.