VIENNA COMPUTER STRESS TESTS
Soon after the Vienna Instruments were released, the Vienna Symphonic Library (VSL) published a series of stress tests demonstrating the efficiency of this new product line on a variety of systems. The most advanced system at the time was the P4 and the Mac G5. Here are their published system results.

Source: www.vsl.co.at -> Forums –>Vienna Instruments->First Vienna Stress Tests Results on PC
First Vienna Instruments Stress Test Results on PC

We have tested the Vienna Instruments on various computers and doublechecked on similar machines. All computers are fully equipped DAW´s that are used in everyday studio work, no additional tuning.

More tests are in the works, with different processors and hosts. Our tests with Sonar, FX Teleport, Chainer, Plogue Bidule, Forte showed the same results, the Vienna Instruments behave the same way as in Steinberg Cubase SX or Vstack.

The test results for Audio Units on Apple will follow as soon as possible.

Please bear in mind, that the RAM available is also used by the hosts (around 300 MB) and Windows (another 300 MB), which is why the limit of RAM usage is 1.3-1.5 GB for the Vienna Instruments in a computer equipped with 2 GB RAM.

The testing routine: Play a (really stressy!) stress test song with different loading options (more instruments, less RAM, and the other way around). All instruments are playing all the time, using all kinds of matrices and patches, and of course including additional MIDI data like ModWheel and different assigned sliders.

You always see the maximum Vienna Instruments possible in the given setup without any sonic trouble.

TEST COMPUTER 1
Processor: Pentium 4, 3.2 GHz, Ram: 2 GB Data storage: internal SATA Host application: Cubase SX3 Soundcard: RME HDSP Multiface Latency at 512 Samples (12ms) / 1.2 GB Ram usage Maximum Vienna Instrument instances: 24 (CPU 75%) Maximum polyphony: 200 stereo voices / (CPU 75%) Latency at 256 Samples (6 ms) / 1.3 GB Ram usage Maximum Vienna Instrument instances: 20 (CPU 70%) Maximum polyphony: 200 stereo voices / (CPU 75%)

TEST COMPUTER 2
Processor: Pentium 4, 3 GHz, Ram: 2 GB Data storage: Firewire 400 Host application: Cubase SX2 Soundcard: RME DIGI 9652 Latency at 1024 Samples (24 ms) / 1.3 GB Ram usage Maximum Vienna Instrument instances: 24 (CPU 50%) Maximum polyphony: 200 stereo voices / (CPU 60%) Latency at 512 Samples (12 ms) / 1 GB Ram usage Maximum Vienna Instrument instances: 18 (CPU 50%) Maximum polyphony: 200 stereo voices / (CPU 60%) Latency at 256 Samples (6 ms) / 1.2 GB Ram usage Maximum Vienna Instrument instances: 14 (CPU 60%) Maximum polyphony: 180 stereo voices / (CPU 65%)

TEST COMPUTER 3
Processor: AMD 2.6 GHz, Ram: 2 GB Data storage: Firewire 400 Host application: Cubase SX3 Soundcard: Creamware Pulsar & Luna Latency at 13ms / 1.3 GB Ram usage Maximum Vienna Instrument instances: 20 (CPU 70%) Maximum polyphony: 200 stereo voices / (CPU 70%) Latency at 7 ms / 1.2 GB Ram usage Maximum Vienna Instrument instances: 16 (CPU 65%) Maximum polyphony: 174 stereo voices / (CPU 60%)

TEST COMPUTER 4
Processor: Pentium 4, 2.8 GHz, Ram: 2 GB Data storage: internal SATA Host application: VSTack Soundcard: RME DIGI9632 Latency at 512 Samples (12ms) / 1.4 GB Ram usage Maximum Vienna Instrument instances: 16 (CPU 70%) Maximum polyphony: 180 stereo voices / (CPU 70%) Latency at 256 Samples (6 ms) / 1.4 GB Ram usage Maximum Vienna Instrument instances: 8 (CPU 55%) Maximum polyphony: 160 stereo voices / (CPU 70%)

TEST COMPUTER 5
Processor: Pentium 4, 2.4 GHz, Ram: 1.5 GB Data storage: Firewire 400 Host application: VSTack Soundcard: Steinberg VSL 2020 Latency at 512 Samples (12ms) / 1 GB Ram usage Maximum Vienna Instrument instances: 16 (CPU 60%) Maximum polyphony: 200 stereo voices / (CPU 80%) Latency at 256 Samples (6 ms) / 1 GB Ram usage Maximum Vienna Instrument instances: 14 (CPU 60%) Maximum polyphony: 200 stereo voices / (CPU 80%)

TEST COMPUTER 6
Processor: Laptop Pentium M, 2 GHz, Ram: 2 GB Data storage: Firewire 400 Host application: Cubase SX3 Soundcard: RME HDSP Multiface Latency at 512 Samples (12ms) / 1.2 GB Ram usage Maximum Vienna Instrument instances: 14 (CPU 65%) Maximum polyphony: 160 stereo voices / (CPU 65%) Latency at 256 Samples (6 ms) / 1.1 GB Ram usage Maximum Vienna Instrument instances: 10 (CPU 55%) Maximum polyphony: 150 stereo voices / (CPU 65%)

TEST COMPUTER 7
Processor: Pentium 3, 1 GHz, Ram: 2 GB Data storage: Firewire 400 Host application: VStack Soundcard: RME DIGI 9632 Latency at 512 Samples (12ms) / 0.6 GB Ram usage Maximum Vienna Instrument instances: 5 (CPU 70%) Maximum polyphony: 90 stereo voices / (CPU 65%)

First Vienna Instruments Stress Test results on Mac OS X
So here they are, the first official test results with the new Vienna Instruments as Audio Units on Mac.

As on the PC platform, we have tested the Vienna Instruments on various computers and doublechecked on similar machines. All computers are fully equipped DAW´s that are used in everyday studio work, no additional tuning.

More tests are in the works, with different processors and hosts. Test results for the Quad will be released as well, we expect more Vienna Instruments to be loaded with maximum amount of RAM.
The limit of RAM usage is about 2.8 GB for the Vienna Instruments in a computer equipped with 4 GB RAM, that translates to 47000 samples.

The testing routine: Play a (really stressy!) stress test song with different loading options (more instruments, less RAM, and the other way around). All instruments are playing all the time, using all kinds of matrices and patches, and of course including additional MIDI data like ModWheel and different assigned sliders.

You always see the maximum Vienna Instruments possible in the given setup without any sonic trouble.

TEST COMPUTER 1
Processor: G5, 2 x 2.5 GHz, Ram: 4 GB OS 10.4.2 Data storage: Firewire 800 Host application: Logic 7.1.1 Soundcard: RME HDSP MADI with 648 MADI Interface Latency at 512 Samples (12ms) / 2.5 GB Ram usage Maximum Vienna Instrument instances: 24 (CPU 90%) Maximum Samples loaded: 45000 Maximum polyphony: 300 stereo voices / (CPU 70%) Latency at 256 Samples (6 ms) / 1.74 GB Ram usage Maximum Vienna Instrument instances: 23 (CPU 70%) Maximum polyphony: 200 stereo voices / (CPU 75%)

TEST COMPUTER 2
Processor: iMac G5 single, 1.8 GHz, Ram: 2 GB OS 10.4.5 Data storage: Firewire 400 Host application: Logic 7.1 Soundcard: Built in Audio Latency at 512 Samples (12ms) / 1.08 GB Ram usage Maximum Vienna Instrument instances: 11 (CPU 85%) Maximum Samples loaded: 17400 Maximum polyphony: 250 stereo voices / (CPU 80%) Latency at 256 Samples (6 ms) / 1 GB Ram usage Maximum Vienna Instrument instances: 9 (CPU 85%) Maximum polyphony: 160 stereo voices / (CPU 80%)