Re: [SoX-users] Loopback latency issue

[Darryl L. <dar...@un...>]

Is your virtual machine exactly the same (OS version) as your physical PC?
It might be a driver issue with different versions.


From: Maxim Doumkine <ma...@co...>
Reply to: "sox...@li..." <sox...@li...>
Date: Saturday, 11 July 2020 at 3:58 am
To: "sox...@li..." <sox...@li...>
Subject: [SoX-users] Loopback latency issue

Hello everyone,

We are trying to build a Sox based real-time sound altering app, and we’ve got everything working on our LUbuntu 16.04 stations except for an issue w latency.

When we test it on actual hardware, we are having a latency of about 2 seconds, when we test it on our virtual machine the latency is more like 250ms.

sox -t pusleaudio default -t pulseaudio null pitch n
Whenever we add the null loopback or aloop, we experience a delay. No amount of config tinkering seems to affect this latency on an actual workstation.

We’d appreciate an advice or any input but would be equally glad to hire a consultant for a fee to get this resolved.

Thank you.