Audio Buffer Round-Trip Latency Calculator
What part of monitoring latency comes from buffering, and what remains in converters or drivers?
Method, formula and assumptions
One buffer duration = frames / sample rate x 1000 ms. Multiply by the total count of input plus output buffers, then add the entered measured driver/converter latency.
Input definitions and supported units
- Frames in each buffer: Whole-number count, from 1 to 65536; must be positive.
- Sample rate (Hz): Whole-number count, from 8000 to 384000; must be positive.
- Total input and output buffers: Whole-number count, from 1 to 20; must be positive.
- Measured extra latency (ms): Measured or assumed numerical value, from 0 to 1000; zero is supported where the stated method permits it.
Worked example with answer
256 frames at 48 kHz lasts 5.3333 ms. Two buffers plus 3 ms extra produce 13.6667 ms round trip, of which 21.9512% is extra latency.
How to use the results
Compare two buffer settings while holding the measured extra latency constant. Lower buffers reduce only the buffering term and can increase dropout risk.
Results retain full precision internally and display up to four decimal places. Very small nonzero results use scientific notation rather than appearing as zero. Check the labels before comparing values across units.
Limitations and references
The buffer count must describe your actual signal path. This does not measure a driver, account for plug-in lookahead automatically, or guarantee real-time performance.
The method is a self-contained arithmetic, geometric or explicitly stated mathematical model. There are no imported tariffs, empirical presets or equipment specifications; measured values and allowances must come from your own process.
Related planning tools
Creator & reviewers
Creator persona
- Casey RowanUnits, conversions & measurement
Reviewer personas
- Devon ShawFormula & assumptions review
- Sage MitchellClarity & usability review