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Lowest practical latency with Quantum 2626 on PC

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asked Nov 2, 2020 in Thunderbolt - Quantum by mortenjhnk (220 points)
Hi

I am running Studio One 5 on a PC, and I am considering to ditch my USB interface and go with a Quantum 2626 to get that low latency. It seems that most people using Thunderbolt interfaces are using Macs and I guess that they are a bit better in getting very low latency. I do not have that option so what is a practially achievable latency on PC - in a session with 10-20 tracks? Are there any pitfalls to avoid? (And yes, my PC is Thunderbolt 3 compatible although I haven't bought the TB3 card yet..)

Regards,

Morten Jøhnk

1 Answer

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answered May 27, 2021 by kendallmiles1 (490 points)

Here are my latency figures from Ableton. I have a pretty high end PC, and it is stable at a buffer size of 256. Sometimes I will have to switch to 512 towards the end of my projects. I have the Asus EX3 thunderbolt card. Unfortunately I have many issues with the stability of this interface, but trying to get it fixed through support. This interface would be great if I didn't have to struggle to get it to work properly without restarting/reseting all the time. 

(Buffer size 32) - overall latency:  2.72ms, input latency: .91ms, output latency: 1.81ms

(Buffer size 64) - overall latency: 3.45ms, input latency: 1.63ms, output latency: 1.81ms

(Buffer size 128) - overall latency: 6.35ms, input latency: 3.08ms, output latency: 3.27ms

(Buffer size 256) - overall latency: 12.2 ms, input latency: 5.99ms, output latency: 6.17ms

(Buffer size 512)- overall latency: 23.8ms, input latency: 11.8ms, output latency: 12ms

(Buffer size 1024)- overall latency: 47ms, input latency: 23.4ms, output latency: 23.6ms

(Buffer size 2048)- overall latency: 93.4ms, input latency: 46.6ms, output latency: 46.8ms

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