QUEERY: What samplers are out there let you record and instantaneously play back from a keyboard

["Rick Walker (loop.pool)" <GLOBAL@cruzio.com>]

Is anyone aware of a sampler (preferably inexpensive) that allows you to
sample an instrument and, instantaneously play that sample live from a
keyboard.    I am really interested in found sound and would love to be 
able
to create keyboard samples that an audience could see were being created 
and
then played in front of their faces by either a wind synth or a keyboard,

thanks,  Rick Walker (loop.pool)