Offizieller Kommentar
Hello,
The SP-16 will do live sampling from any audio source plugged into the input. It does not sample from the usb drive if the sample is longer then 64 secs. You don't need a CDJ to sample from a usb, the usb can be played from any usb player and connected to the audio input. The Record Button allows you to record triggers and midi information for live performances.
Hopefully this answers your questions.