Quote:
Originally Posted by
yuka
β‘οΈ
I've managed to setup the card so it doesen't pop and crackle all the time. Stability is pretty good, however the minimum latency setting stresses the CPU really hard. I've noticed +50% CPU usage at that setting without doing anything (idling in windows desktop). And I have a pretty good computer, so I am stuck to using LOW at best. Also the firmware is messed up, there is also no way to turn off the soundcard on the interface itself (other then plugging off the cables which is annoying), and if you leave the soundcard on there is a bug that prevents your computer going to sleep. They are "working on fix", for months now. So yeah. I don't understand the logic behind the, lets fix the scroll thingie but introduce such annoying bug for it.. wow. Drivers could be better imo. Other then that the interface has great sounding mic preamps, awesome DI input which is really really good (sounds like an old console table that David Gilmour used on another brick from the wall solo) and pretty decent headphones amp which is able to drive my DT880pro at 250ohms. I wish it had RME drivers, then it would be perfect interface.
Generally when you decrease buffer length, it always leads to increased CPU usage consumption. This applies to DAWs, where larger chunks of data are processed more efficiently, and also to drivers, because short buffer means more calls and interrupts with its associated overhead.
USB interfaces with very efficient proprietary drivers (like RME), PCIe ones or Firewire interfaces with DMA.. has base CPU consumption for audio transfers via its driver so low, that its increase will be apparent with shorter buffers.
It can be seen by great latency table by Vin Curigliano
DAW Bench : DAW Performance Benchmarking
Check the CV and NCV columns, which tells how many instances of Kontakt is possible to use without audio dropouts.
Increase of CPU usage at your system during its apparent idling can be caused by mapping of Windows sounds through iD14 sound device. Audio transfers via WDM interface of its driver aren't much different from ASIO and are also affected by buffer settings. Sometimes just one minimized application like web browser can leave opened audio device although there is nothing playing.
Just for the test, you can try to disable iD14 from Windows playback devices list (right click context menu) to see if that "idle" load decreases.
I see your other listed iD14 negatives, but it would probably fall into cosmetic bugs category for me personally.
I treat every DAW computer, I'm installing, basically as more or less dedicated machine, where all power saving features should be disabled, when it is used for audio work.. This includes also settings, which prevent USB audio device to power off in saving mode, at USB root hub driver preferences. Similarly I usually employ customized High performance power profile at Windows (when someone doesn't want that, I will create shortcuts for easy switching).
Lack of power switch is common thing for bus powered USB interfaces and can be solved by simple in-line power switch, when required
USB Cable with Switch ID: 1620 - $2.95 : Adafruit Industries, Unique & fun DIY electronics and kits
(just one notice for its usage, there can be quite loud thump into connected speakers when turning on the interface, so just pay attention to power it before speakers).
And I also like Audient's sound (based on, what I've heard from iD22). I think they packed really good sounding interface to that affordable category (actually exceeding quite lot of more expensive pieces).. intuitive GUI for cue mix is plus for musicians. Quality of preamps, converters, volume control and headphone amp was really surprising for me at that price level and I feel those as its strong points.
Drivers (I'm not talking about mixer or GUI) are average.. IME not better or significantly worse among other similar USB class compliant interfaces, which are mostly implemented at XMOS microcontrollers with 3rd party driver.
Step up in terms of performance and efficiency are RME or MOTU USB devices, but I tend to prefer RME at Windows due to quite few issues with MOTU, I had in the past.
Somewhat in-between are Steinberg USB devices with their own driver and Yamaha USB streaming chip, which are quite reliable performers with lower CPU load.
So if one has sufficient budget for interface purchase, it is quite clear recommendation to me.. RME, possibly augmented by external preamps (for instance by Audient

). I feel that almost mandatory for live performance or heavy use of VSTi.. finding of alternatives is usually just waste of money and time.
In lower price levels, one has to pick and Audient and SPL are strong at audio quality. I feel them mainly as audio hardware companies, so I see they hadn't developed their audio streaming at FPGAs or dedicated chips, similarly I can see, they used 3rd party driver. But depending on intended use, its latency performance can be absolutely fine for lot of folks out there. Especially when they're not using any amp simulators, monitoring direct and when they use VSTis, actual performance means drawing of rectangles into piano roll (or they're sloppy chord pushers like me

), so longer latency isn't really an issue. On the other hand, they can appreciate quality of preamp and DI when recording live instruments or singing.
Michal