For my audio samples I use Goldwave (on XP). I simply create a new empty 11KHz sound file. It is 16bit by default, so I save it (still empty) as an 8bit wav. I reopen this empty 8bit 11KHz file and record my audio track directly from any source, CD, web etc. then it is recorded in 8bit 11KHz, so I don't need to convert it !
The results aren't that bad and are less noisy than a conversion like 16bit 44KHz -> 8bit 11KHz.