Akai MPC 5000 Reference Manual page 24

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This will allow the main mix of your MPC to be heard.
This will allow individual samples and sounds to be sent individually to be recorded.
Other examples of ways you can connect your MPC5000's outputs include connecting the [STEREO OUT] to a mixing board to mix the MPC
alongside other instruments, and using the [ASSIGNABLE MIX OUTS] to send certain sounds to external effects processors.
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Sources plugged into the [RECORD IN] jacks can be sampled to be used in Sample Programs. The [RECORD-IN] jacks are 1/4" / Mic combo
jacks, allowing either type of connector to be used. The input level for this jack is controlled using the [REC GAIN] knob.