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Latency
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Sound Surgeon
Crater / Mish-kah
Started Topics :
250
Posts :
2244
Posted : Aug 18, 2002 22:18
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can anyone explain what is it?
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A.Rosengren
Solid Snake
Started Topics :
266
Posts :
4139
Posted : Aug 19, 2002 06:08
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Its and delay  the time it takes for the sound youve created to travel from your comp/equip to the speakers/monitors, often u talk bout it in Milliseconds cus if its seconds youre in trouble
A
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Pavel
Troll
Started Topics :
313
Posts :
8649
Posted : Aug 19, 2002 21:31
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Ok Baba i'll try to explain this as easy as possible.
Now, you have 6 different devices that you use for making a music. 1 - Midi Controller, 2 - Sound/Midi Card, 3 - CPU, 4 - RAM, 5 - Bus, 6 - Speakers.
Suppose you are using Fruity loops as sequencer and Pentagon as a VSTi which you trigger by your Midi Keyboard ok? Now this is (roughly) the order of things to happen before you hear a sound in your speakers:
1. You trigger a note in the MIDI keyboard, let's say c3.
2. The command enters the MIDI interface in your Sound/Midi card.
3. The Sequencer (Fruity Loops, which is executed by CPU and uses your RAM) gets the command from the Midi interface through the Bus and understands that it should play c3 note on the chosen VSTi (Pentagon).
4. Pentagon is triggered and sends the sound back to Fruity.
5. Fruity sends the signal through Bus to Sound/Midi card.
6. The Sound/Midi card sends the sound to speakers.
Now where all this latency created your asking yourself?
It's mostly created on step 5 and 6. Why?
Because the information doesn't just go from the programm to Sound/Midi card fluidly, it is sliced to little chunks and then passed through buffers. Buffers are the chips on Motherboard and Sound/Midi card that store information for a very little time. The Latency created because this buffers hold the information until there's vacant place in the Bus. Bus is like a Highway inside your PC, and it's always jammed with virtual vehicles.
The information can stuck there for quite a while if you are running a lot of applications, even the smallest things like screen savers, animated mouse cursors and ofcourse CPU time eaters like anti viruses.
That's the reason why you have this latency.
How to improve the latency? There are some possible ways. Use more proffessional Sound Card that have better buffers and newer latency reduction technologies like Luna cards with it's ULLI technologies which reduces the latency to 2ms!
Or, on the cheaper side, download newer drivers.
ASIO drivers are not bad, ASIO 2 is cool also.
And there's also KX drivers for SB Live!
That's it basically, hope it'll be helpful
 Everyone in the world is doing something without me |
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Sound Surgeon
Crater / Mish-kah
Started Topics :
250
Posts :
2244
Posted : Aug 19, 2002 22:38
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nicey nice space ninja......roll us a giant
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