Unfortunately this is an Ubuntu bug report forum (as in, a place to provide information useful to Ubuntu developers in fixing bugs in Ubuntu). It's not a general support forum for Ubuntu, and also isn't either a bug report forum or support forum for Debian.
You should search for your problem at http://www.debian.org/Bugs/ and if you do not find it, report it there.
For what it's worth, the external microphone seems to work fine with standard Ubuntu 8.04 builds of software:
Unfortunately this is an Ubuntu bug report forum (as in, a place to provide information useful to Ubuntu developers in fixing bugs in Ubuntu). It's not a general support forum for Ubuntu, and also isn't either a bug report forum or support forum for Debian.
You should search for your problem at http:// www.debian. org/Bugs/ and if you do not find it, report it there.
For what it's worth, the external microphone seems to work fine with standard Ubuntu 8.04 builds of software:
linux-image- 2.6.24- 16-generic (Ubuntu build 2.6.24-16.30)
alsa-base (Ubuntu build 1.0.16-0ubuntu4)
alsa-utils (Ubuntu build 1.0.15-3ubuntu2)