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With the Quantum, Presonus has a rock-solid performer. Prior to the Quantum interfaces, I wasn't a huge fan of Presonus audio interfaces. The better USB-2 audio interfaces are just under 5ms total round-trip latency at a 64-sample ASIO buffer size 44.1k. That yields 1ms total round-trip latency (verified with RTL Utility).Īt 44.1k using a 64-sample ASIO buffer size, Quantum yields 3.4ms total round-trip latency. Quantum (unlike many audio interfaces) will allow you to select a 32-sample ASIO buffer size when working at 96k. If you looking for lowest possible round-trip latency, it's hard to beat the Presonus Quantum. If you're running a recent make well-configured machine, it's quite possible to (effectively) work at 32 or 64-sample ASIO buffer size. If I just needed to play I could have smaller buffers, but I usually have some tracks with virtual instruments - drums, synths, samplers, and some audio tracks with warping.Ĭlick to expand.If an audio interface yields super low round-trip latency at a 32-sample ASIO buffer size, it's going to yield low round-trip latency at a 128-sample ASIO buffer size.
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With no less than 128 sample buffers, ever, sometimes 256. I personally always work at 48 kHz for compatibility with Axe-FX and Helix Native. It’s the only plugin I know that sounds worse as you raise the sampling rate, but who knows, there may be others. There are also weird examples like Helix Native that always works internally at 48 kHz, so if you work at a different rate it’ll do double sample rate conversion in real-time, will add latency, consume more CPU and cause aliasing distortion. But that also costs a lot of CPU, and, really, plugins should oversample without these tricks. Sampling rate - well, that’s another topic for debates, the thinking is that when you raise the sampling rate it sort of forces everything into higher oversampling, so you get less aliasing. Plugins you use also matter - some of them don’t work properly with very low buffers. Click to expand.Whatever works for you, it depends a lot on how powerful your computer is, what else is running etc.