Recently spent some time optimizing #roctoolkit latency over Ethernet.

So far, achieved 7ms for transport + 12ms for two USB sound cards.

This is the photo of my test bench for measurements.

Legend: R1, R2 - #raspberrypi; S0, S1, S2 - sound cards; L1, L3 - jack cables; L2 - ethernet cable.

Roc runs on R1 and R2 and streams sound from S1 to S2.

On PC, I run #signalestimator that writes sound to S0 output, reads it back from S0 input, and measures latency.

#linuxaudio #audioprogramming

#signalestimator got support for correlation-based latency measurement, which is very reliable and precise.

Thanks Mike (https://github.com/baranovmv) for implementing it and Samuel Blum at ViveSound (https://www.vivesound.com/) for sponsoring development!

https://github.com/gavv/signal-estimator/issues/3