it's very easy to use a sequenser, performer, digital performer, LOGIC Pro, Cubase, and more..... for sample-dumps:
first you need MIDI-connections from the computer-midi-out to the sampler/synthesizer mids-in. and a cable from the sampler/synthesizer midi-out to the computer-midi-interface in.
startup your sequenser, and make a recording-track for your sampler/synthesizer. set the tempo not to slow, and not to fast. something like 100 BPM. don't change this anymore after the recording.
push the record-button of the sequenser, wait some bars, and tell the sampler/synthesizer to do a midi-sample-dump (send).
when finished, you can check your track if there is a lot of data recorded.
than you can set the sampler/synthesizer to receive a sample-dump, and push the play-button of your sequenser..wait..till ready!
this also works for sysex-dumps...
easy! :-)