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ASIO vs Core Audio Latency measured at 32, 64, 128 buffer. Asio much faster
Old 22nd July 2019
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jrp's Avatar
ASIO vs Core Audio Latency measured at 32, 64, 128 buffer. Asio much faster

Hi Folks,

did some testing today. This is a simple loop test with Reaper (driver compensation set to off!)
I had notoced before that performance with ableton live was about the same with osx @ 32 samples buffer and windows @ 64 samples while reported latencys where lower on windows. So i started an investigation

Asio is much faster on my system. I would like to know if that is typical, if it varies with different interfaces or if it´s a general thing with asio being a bit faster.

Little click played back and recorded using 32, 64 and 128 samples buffer settings. All at 96khz

- Interface Motu PCIe 424 with 24io

- i7 2600k, Gigabyte z68xp-ud3, GTX1060, Sata3 SSD

- Unoptimized Windows10 with steam in background (forgot to turn it off). Latest ASIO driver.

- High Sierra Hackintosh with Core Audio and latest Motu Control Panel software

Win 32 Samples Buffer: Latency 166 samples (1,73ms @ 96k)

OSX 32 Samples Buffer: Latency 229 samples (2,34ms @ 96k)

Win 64 SamplesBuffer: Latency 229 samples (2,34ms @ 96k)

OSX 64 Samples Buffer: Latency 294 samples (3,06ms @ 96k)

Win 128 Samples Buffer: Latency 358 samples (3,73ms @ 96k)

OSX 128 Samples Buffer: Latency 423 samples (4,41ms @ 96k)
Attached Thumbnails
ASIO vs Core Audio Latency measured at 32, 64, 128 buffer. Asio much faster-latency-win-vs-osx.jpg  
Old 22nd July 2019
Lives for gear
norbury brook's Avatar

ASIO has always been more efficient, it makes less kernel calls per sample than core audio. Core audio has the advantage of being able to use more than one interface and is built into the OS if that's really an advantage :D

your results are normal and to be expected.

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