Mari Kimura is a New York composer and virtuoso violinist whose music includes haunting low notes on the violin

http://www.noiseaddicts.com/?p=16#more-16

Here is a sample of the sound that should not be possible.

She says: “As an artist you are always searching for ways to expand the sound.” Oh yes, in case you were wondering, there *is* an audio example. There are more examples of longer pieces here.