Musical instruments produce sounds.
Composers produce music.
Musical instruments reproduce music. Tape recorders, radios, disc players, etc., reproduce sound. A device such as a wind-up music box produces sound and reproduces music. A sampler, in essence a recording, transforming instrument, is simultaneously a documenting device and a creative device, in effect reducing a distinction manifested by copyright. Some of you, current and potential samplerists, are perhaps curious about the extent to which you can legally borrow from the ingredients of other people's sonic manifestations.