Sample Rate (Hardware)

• In general, there should only ever be one block in a flowgraph that has the ability to throttle sample flow.

• Otherwise you need to be very careful with multiple, unsynchronised clock sources: they will eventually go out of sync and cause overflows/underruns as their production/consumption rates will differ.

• This is the 'two clock' problem (discussed later)
• Work arounds: allow non-blocking I/O, and/or tweak resampling rates to account for the clock offsets