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Pulsar II pro ULLI allow the shortest latency setting (the top line:4ms...),but when I choose it ,my audio and VST instrument play back always got "be-be--po-po..clip noise",even second one (6ms....) got same problem,till I set it to third line (10ms...)then all problem is gone,why have this kind of problem?any setting wrong or my system is too slow?

PIII800
CUSL-2C
512mb ram
30G HD ATA100
MATROX G400 32mb DH
Nuendo 1.5.3 and logic audio 4.8.1

Jerry
Taiwan

Lowest ULLI setting is machine-dependant. Just set it to the lowest that seems to run stable.
A 'first generation' card, like Pulsar1, has no real ULLI drivers and will not perform lower than 13ms @ 44.1kHz.
A second generation card should be easily use 7ms latency, faster is a bonus.

*Hardware I/O's are always at 0ms.

*XTC uses more complicated driver routings (going back and forth over the ASIO drivers)and will thus have longer latencies. There's a 'dummy DSP effect' to insert in a chain of XTC plugins in your VST mixer. It will enhance XTC latency.

*Using cubase's 'Plugin delay compansation', you can have VST synths, recorded, who are actually played, anticipating on the latency. All Cubase's *recorded* audio will then play with 0ms latency.
I did notice the built-in VST Compressor causes too much delay to use it, regardless of real-time or recorded input.

*VSTsynths, played live thru software, will 'suffer' from the ULLI latency.

*My experience says 0ms latency doesn't count for Rewire channels, they appear to be treated as 'live' inputs in VST environment.

*But once recorded into wav in VST, they will be sample-accurate

Best wishes,

at0mic.

<font size=-1>[ This Message was edited by: atomic on 2001-12-29 07:30 ]</font>

Especially when you use STS sampler, it would be best on 13ms @ 44.1kHz, according your PC performance.