^^I wouldn't say sampling is recording. There are different forms of sampling. Sampling directly from the source, for example Kanye West - Thru the wire which samples Chaka Khans - Through the fire (The speeded up mickey mouse vocals). The other form of sampling is replaying the sample, for example re-creating a riff with live instrumentation/synthesizers. Kanye probably uses both. Im not sure if interpolation is sampling aswell but this is basically recreating a sample but making it with a slight variation. Hope that has cleared things up for you a bit. You can also sample drum hits, snares etc and incorporate it into your own music.