PlanetZ forums - scopeusers.com

Thanxs again to all, especially valis for his technical insight.
I am now looking at a laptop which comes with 2 5400rpm sata drive as standard features. But it also has IDE ports so in case it doesn't work I can alwas switch one or both to IDE (I still have an 7200RPM 2.5 ''IDE drive). Is 5400 sata ...

Thanks to all already. I am more confident now.
Anyone with specific laptop recomandations with S-ata drives ?

By the way does it interrupt the CPU in a similar way as IDE or does it always acces through PCI therefore compromising your scope acces to the cpu ?

OK. Thanks. Anybody else with good results ?

The title tells it all. Can someone tell me if S-ATA is okay for hardrives in order to manage throughput at low latencies for audio ?
More and more laptops come equipped with 1 or 2 S-ata drives so I would like to know before I buy.

Thank you all.

Geoff

I think you understand pretty much now. If you are playing sound straight from the DSP's (i.e. B2003) "latency" is only the time it takes to produce the sound and output it from the card (between 1ms and 2 ms depending whether you're using digital or analog outputs. D/A conversion takes a little ...

Your link relates to midi jitter which has nothing to do with latency.

The purpose of the test mentionned is to check the midi accuracy when playing notes.

You get confused when they say latency and actally mean deviation or jitter. It's inherent to Microsoft's opeating systems but some audio ...

Last, in order to answer your original question

does Magma chassis increase the Scope latency?

The answer is no.

Another thing about STS. 16 bit stereo voices are interleaved so that in only uses one 32 bits burst (2X16=32)to send 2 voices from your system memory to your dsp card. I believe it's the same for 16 bit asio drivers but if you use 24 bit asio drivers, one 24 bits voice will use one 32 bits burst ...

Yes I am talking about your ULLI settings which is the speed at which your card will communicate to your CPU and vice versa. It affects ASIO, STS voices and any plug-in that needs to access your system memory i.e. reverbs, delays, etc. It's measured in buffer sizes as exponent of 2 X 64 i.e. 2^0 X ...

To give you an idea of real figures, I use mine at 4ms flawlessly with Sx3.
I remember computing the troughput between the chassis and the laptops every time I had a new one. It's chipset dependent, cardbus controller dependent and OS dependent. All laptops aren't equal for sure.
I can have up to 64 ...