Latency Probe
Shows how long audio takes between two nodes, and what the time is spent on.
Right-click → Tools → Latency Probe, click Choose nodes, then click the node to measure From and the node to measure To (Esc cancels). Hover the card to highlight the route.
The card shows the delay in ms and splits the slowest route into In (input device buffering), Block (one engine block), FX (plugin latency), DAW (a trip through Virtual ASIO) and Out (output device buffering). Several routes show as a range.
It is the engine's estimate from buffer sizes and reported plugin latency; delay a driver does not report is not included.
When audio cannot get through, the card says why instead: No audio arrives, Muted on the way, Switcher set is off, Blocked by a loop, Stops at Virtual ASIO (the DAW's own routing is invisible to Routling) or Device offline.