dennis@ubuntu:~$ sudo apt-get install gstreamer0.8-plugins
Reading package lists... Done
Building dependency tree... Done
The following extra packages will be installed:
  gstreamer0.8-a52dec gstreamer0.8-aa gstreamer0.8-artsd gstreamer0.8-caca
  gstreamer0.8-festival gstreamer0.8-jack gstreamer0.8-mad gstreamer0.8-mikmod
  gstreamer0.8-mpeg2dec gstreamer0.8-sid gstreamer0.8-swfdec jackd
  liba52-0.7.4 libid3tag0 libjack0.80.0-0 libmad0 libmikmod2 libmpeg2-4
  libsidplay1-c102 libsndfile1 libswfdec0.3
Suggested packages:
  qjackctl jack-tools meterbridge libjackasyn0 sidplay-base xsidplay
The following NEW packages will be installed:
  gstreamer0.8-a52dec gstreamer0.8-aa gstreamer0.8-artsd gstreamer0.8-caca
  gstreamer0.8-festival gstreamer0.8-jack gstreamer0.8-mad gstreamer0.8-mikmod
  gstreamer0.8-mpeg2dec gstreamer0.8-plugins gstreamer0.8-sid
  gstreamer0.8-swfdec jackd liba52-0.7.4 libid3tag0 libjack0.80.0-0 libmad0
  libmikmod2 libmpeg2-4 libsidplay1-c102 libsndfile1 libswfdec0.3
0 upgraded, 22 newly installed, 0 to remove and 2 not upgraded.
Need to get 164kB/1174kB of archives.
After unpacking 3486kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://us.archive.ubuntu.com hoary/main libsndfile1 1.0.10-2 [164kB]
Fetched 164kB in 0s (216kB/s)
Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/libs/libsndfile/libsndfile1_1.0.10-2_i386.deb  MD5Sum mismatch
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?