Pulse round trip times @ sample rate 96 ks/s From a WREN impulse generator out through RME (1), then to a Nord modular, back to RME back into wren, back to output (2). The Nord adds about 1 ms delay to the round trip time. The difference in time between (1) and (2) is measured by setting the impulse firing rate in Wren and listening to the timing difference trough headphones. This is accurate to within +/- 25 ct (limited by the timing resolution of the LFO used) .. which is about +/- 3 %. +----------+-------------+--------+--------+--------+ | samples | buffer time | WASAPI | DS | MME | +----------+-------------+--------+--------+--------+ | 8 | 83 µs | 72 ms | 91 ms | - | | | | | | | | 16 | 166 µs | 65 ms | 71 ms | - | | | | | | | | 32 | 333 µs | 67 ms | 73 ms | - | | | | | | | | 64 | 667 µs | 65 ms | 97 ms | 116 ms | | | | | | | | 128 | 1.3 ms | 76 ms | 97 ms | 116 ms | | | | | | | | 256 | 2.7 ms | 67 ms | 97 ms | 116 ms | | | | | | | | 512 | 5.3 ms | 69 ms | 97 ms | 116 ms | | | | | | | | 1024 | 10.7 ms | 76 ms | 97 ms | 113 ms | | | | | | | | 2048 | 21.3 ms | 89 ms | 103 ms | 119 ms | | | | | | | | 4096 | 42.6 ms | - | - | 84 ms | | | | | | | | 8192 | 85.2 ms | - | - | 119 ms | +----------+-------------+--------+--------+--------+