I have now checked latency at various buffer settings. Here is an example screenshot documenting these measurements:
From this screenshot, one can see that at Buffer Size 512 Samples, Input Latency (IL) is 32ms and Output Latency (OL) is 32 ms.
Here are other measurements:
Buffer Size…Input Latency…Output Latency
512…32ms…32ms
384…23ms…26ms
256…15ms…20ms
192…10ms…17ms
128…9.4ms…14ms
64…5.9ms…11ms
All of the above measurements were made under the same conditions, after the iMac computer had sat all night in sleep mode, with the following apps loaded (not running) in the background (not including Cubase):
Finder, Safari, Chrome, Itunes, Quicktime, Activity Monitor, Preview. I also had a USB MIDI keyboard plugged in.
I tried unplugging and plugging in the keyboard, and turning off the background apps one at a time. There was no appreciable difference in the above values in doing so.
I rebooted the machine, and took the following couple of measurements, after opening and closing Chrome (the MIDI keyboard, and of course eLicenser, were still plugged into USB ports):
Buffer Size…Input Latency…Output Latency
512…32ms…32ms
128…9.5ms…14ms
Are not these latency values for Built-In Audio extremely high?!
In Steinberg’s online tutorial, “Cubase 8, Chapter 2”, (How to Get Cubase Connected | Getting Started with Cubase Pro 8 - YouTube)the IL and OL are shown (@~3:50 into the video) to be only 7.9ms and 14.7ms for Built-in Audio on his Mac. It is not clear in the video what his Buffer setting is set to for Built-in Audio.
Besides my atrocious latency values (doucumented above), here is another issue raised by that video: Why is the latency for the Yamaha Steinberg FW less than Built-in Audio?!? Built-in Audio should typically be a computer’s lowest latency configuration. Adding an external interface should not decrease latency for today’s powerful computers. How can that Steinberg EXTERNAL interface possibly being doing a lower latency A/D conversion than the motherboard A/D converter? Is the ASIO Driver adding additional (slow) processing to the Mac’s CoreAudio that consequently makes it preferential (from the perspective of minimizing latency) to use an EXTERNAL (typically expensive) interface?!?