Has anybody had any experience with ASIO performance under heavy load/processing demands on C7.5? More specifically, can anybody assertain that their multicore CPU capacity is properly utilized by Cubase under high-load conditions?
As my standard VSTi template has grown larger over the last year or so, I’ve also grown more concious that Cubase’s processing performance was more easily reaching its max “capacity”, which I define as the point where I start getting real-time audio playback drop-outs. Since moving to C7.5, I decided to formally assess my “system’s capacity”. Two scenarios: Cubase in standalone, and then Cubase with Vienna’s VEP5 hosting all my VSTi template (which is the way I traditionally work).
I’ve recently run a lengthy series of tests for the two scenarios (C7.5 standalone, then C7.5+VEP), under same conditions: a number of concurrent audio tracks plus insert FX’s, and a number of VSTi’s plus insert FX’s, and a number of FX’s on the master bus. Fairly simple tests. Then two different set of tests: First, point was to increase number of FX’s keeping audio and VSTi tracks fixed until ASIO drop-outs in realtime playing started to show (by hearing and red indicator on Cubase’s VST performance meter). Second, point was to increase number of tracks while keeping FX’s fixed.
My system: Intel 990X @ 4.34GHz on Intel DX58SO2, 24GB Patriot DDR3 2000, system and multisample/VSTi drives on SSD’s, and a couple RAID arrays on SLI card for archiving and multimedia. Running Cubase 7.5 on Win7 x64. Mackie Onyx FireWire 24-bit/48kHz at 128 buffer, 5.4ms latency.
On Cubase: Multiprocessing was enabled, ASIO Guard enabled (disabled produced worse performance), audio priority was in “boost”.
System performance was monitored in several ways, through Cubase’s VST performance monitor, using Intel’s Extreme Tuning monitor utility, using Windows Resource Monitor. LatencyMon was used before tests to confirm external system drivers/services where not a factor/issue on ASIO latency and performance.
Without delving into other details at this point for brevity’s sake, my key observations are two-fold:
a) C7.5 standalone: I very rarely saw the multicore in-use count go over 2, although VST performance was peaking out.
b) C7.5+VEP5: I managed to substantially and importantly increase the VSTi+FX count hosted on VEP before maxing out. I could see the multi-core count move to 6 during the playback and heavy load. I was even able to add extra audio tracks on C7.5 before maxing out. So VEP as “middle-ware” proved to be a considerable improvement.
Bottom line, my preliminary conclusion is that I’m quite puzzled and very confused about C7.5 multiprocessing capabilities. Something did not look or feel right, performance was well under what was expected.
Has anybody done some research on this? Actual hands-on experience?