I don't know what to tell you. That 'page of text' contains what are called 'hyperlinks' (I'm using Mozilla as a browser, so for me, they show up as blue underlined text). These hyperlinks will take you to other 'pages of text' (which may themselves have more hyperlinks) or will link to files.
One of these hyperlinks will download the 'source code' for the program. If you download this source code then you will have to compile it (use the search function of this forum to find lots of informaton about compiling). The line with that hyperlink looks like this:
Ardour is available in source code form. The current release is 0.9beta10.2
I have enabled the text above so that it may function as a hyperlink (though some sites are able to disable links from sites other than their own, so it may or may not work).
Another of the hyperlinks on the 'page of text' that you found will take you to another 'page of text' with the title 'Planet CCRMA at home'. If you scroll down almost halfway through the page, you will find yet another hyperlink which says 'Ardour'
This hyperlink will take you to another 'page of text' (this one is pretty big so it may take a while to load) and it should actually do the scrolling for you to a section entitled 'Ardour'. Here you will find several hyperlinks which will download RPM files. RPM files are Redhat software packages, but I think they are essentially compatible with Mandrake. The hyperlinks are on a line that looks like this:
ardour-0.9beta10.2-1 [7.3 | 8.0 | 9 | fc1]
I haven't enabled these links as there is one for each of the 7.3, 8.0, and 9 version of Redhat, and I'm not sure which of these is most compatible with Mandrake 8.1 (perhaps you could start another thread and someone else can help you there).
Another word of warning, the section on ardour contains the following line:
has to be running for Ardour to be of any use.
So you will probably have to install 'Jack' as well. I've never heard of it and would be quite surprised if it is included in Mandrake. Click where it says 'Jack' on that page and it should take you to the download area for Jack. Now remember, you may have to click on other hyperlinks before you actually get to download the file.
Or ... you could try Audacity
. <<<----<< This is a hyperlink to the Audacity homepage. If you go there, look on the left hand side where it says 'Download'. Just below this is a picture of a penguin and a devil, and the words Linux/Unix. Click those words. That will take you to another 'page of text'. if you scroll down the page, you will see a section that describes how to install Audacity on Mandrake.