41 minutes 'o music on a 21 min mini cd

How is it done?

[Yidaki]

Just saw it in a funny tv show. The question was:

A well known german band recored 42 minutes of songs on a 21 minute mini cd.
How did they do it?

german fellows, please go fishing. :)

<edit>Damn. The thread title should read 42 minutes 'o music on a 21 minutes mini cd.</edit>

[werty]

I was interested in this and did some research:

If you have a mono recording, you could double the length of a CD by recording half the sound on the left track and half on the right.

http*//www.idt-microsynergy.com/support/faqs/cdrfaq/part2/faq-doc-16.html

[Yidaki]

Yep, that's it, werty. Isn't it funny!? I gonna try it myself just for fun.

[werty]

Did you get it to work?