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#11
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Re: Insert Issues - Use Pre I/O or 96 I/O?????
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#12
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Re: Insert Issues - Use Pre I/O or 96 I/O?????
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Yes, if you have PDC enabled and you enter the correct latency into the Setup->I/O->HW Insert dialog (per channel), Protools will compensate for the hardware insert delay. However, Protools is not clairvoyant .. it's doesn't know what the latency in the hardware insert path is. If you do not enter it correctly into the Setup->I/O->HW Insert dialog correctly, it will not be able to compensate correctly either. The PT 7 Reference manual (on or about page 70) discusses a technique to allow you to determine what the total latency path is from output converters -> hardware and back is. jeff |
#13
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Re: Insert Issues - Use Pre I/O or 96 I/O?????
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#14
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Re: Insert Issues - Use Pre I/O or 96 I/O?????
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I've never entered anything is those boxes and PT compensates for the D/A A/D round trip. Again, this is the whole point of automatic delay compensation. If you're using analog devices, all you need to do is turn on ADC. Digi knows the latency of its interfaces and compensates based on that. This is why companies like Aurora boast that their box has the same latency as a 192, so PT will work properly with it when using it for inserts. If it's a digital device (page 70 mentions an effect unit) you can then use that method to measure the inherent delay of the digital device and add that in the box. |
#15
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Re: Insert Issues - Use Pre I/O or 96 I/O?????
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You're right .. it knows about the interface delay ... but if the insert path adds any more delay then it doesn't. He mentions the Aphex Exciter .. which ( as I recall ) does add a very small amount of latency. I've had this come up a couple of times with the interns at our studio. It's a common misconception that PT will automatically figure out the external latency path if PDC is on .. and it won't.. jeff |
#16
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Re: Insert Issues - Use Pre I/O or 96 I/O?????
Jeff,
If it's an analog device, the only delay that needs to be compensated for is the D/A and A/D and PT does that automatically. I can of course come up with a specific device (you mention Aphex, I've never seen one that does) and certainly digital devices that need to use the user definable box, but otherwise it's done for you. The goal is to make PT behave like a console, inserting a comp or gate or eq and not having to do anything, and it works perfectly for that. Drew |
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