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VI and preload for streaming?
Last post Mon, Jun 18 2007 by herb, 6 replies.
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Posted on Mon, Jun 18 2007 07:14
by tele
Joined on Wed, Jan 12 2005, Posts 110
Jut bought my first VI and was looking for an option to adjust the sample preload in seconds, as I know it from Halion, but couldn't find it.
In the accompanying printed manual I saw no mentioning of streaming, but I assume the VI does streaming from HD?
Is there a "preload in seconds" option, or is that done automatically?

tele
Posted on Mon, Jun 18 2007 07:57
by DG
Joined on Wed, May 12 2004, Posts 8608
tele wrote:
Jut bought my first VI and was looking for an option to adjust the sample preload in seconds, as I know it from Halion, but couldn't find it.
In the accompanying printed manual I saw no mentioning of streaming, but I assume the VI does streaming from HD?
Is there a "preload in seconds" option, or is that done automatically?

tele

You have no option, as it is all done automatically.

DG
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Posted on Mon, Jun 18 2007 09:48
by tele
Joined on Wed, Jan 12 2005, Posts 110
thanks for that explanation. So does VI have a fixed preload time? Or does it change the preload according to the circumstances.
Even on a fast machine, circumstance change with the number of active VIs playing. E.g. more preload time need when running lots of instances.


tele
Posted on Mon, Jun 18 2007 11:21
by nliberg
Joined on Fri, Dec 02 2005, Posts 232
tele wrote:
thanks for that explanation. So does VI have a fixed preload time? Or does it change the preload according to the circumstances.
Even on a fast machine, circumstance change with the number of active VIs playing. E.g. more preload time need when running lots of instances.

tele


It's fixed - each stereo sample uses 64 kB as preload buffer. I assume that another 64 kB is used for looped instruments or instruments with release samples.
It's a bit unfortunate that it cannot be changed, but maybe the developers argued that RAM use isn't very important for small arrangements and for large ones one needs higher preload buffer sizes anyway so the ease of implementation was deemed more important than making it configurable.

Nils
Posted on Mon, Jun 18 2007 11:44
by tele
Joined on Wed, Jan 12 2005, Posts 110
Thanks for the info.
64 kb, how many milliseconds would that be?
My calculation for 24 bit with 44100 samples per second. About 0.25 seconds I assmume, providing the 64k are unpacked already.

tele
Posted on Mon, Jun 18 2007 12:01
by herb
Joined on Mon, Aug 05 2002, Posts 4618
You have to calculate a 16bit size, because of the compressed format.

best
Herb
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