So if I understand you correctly, ewith the PCIe version, you can have 16 analog I/O's AND 8 ADAT I/O's via the LS-ADAT? And these are all independent of each other? i.e. I can record 24 independent sources?
Thanks,
Quote:
Originally Posted by David Hoatson  Latency: As Paul has already said, the round-trip latency of the AES16e (without the buffer size added in) is 4 samples - because there are no A/D or D/A converters. 2 samples on the input and 2 samples on the output. Add to that the buffer size latency (x2 if you are doing software monitoring) and that will be the total latency. Of course this doesn't include the external device you are connecting to. If it is an Aurora then you add 15 samples on the input and 8 samples on the output (@ 48kHz). Round-trip for software monitoring is then 27 samples plus 2X the buffer size. So for software monitoring with a buffer size of 64 that would be 3.23ms total. With hardware monitoring it would just be 0.56ms.
Cards Per System: The driver can handle up to 8 cards per system - but of course your mileage may vary depending on how your system is configured and how many free slots you have. Starting with OSX 10.4 Apple gave us Aggregate device support which means you can combine the i/o on multiple cards and that is what we expect you to use with your software (except Digital Performer which always supported multiple cards). I'm just trying to make it clear that the driver has always supported multiple cards, but the OS X audio applications (except DP) could only talk to one card at a time. Starting with OSX 10.4 that limitation is gone.
Channels Per Card: The AES16e comes with 16 i/o of AES/EBU built in (up to 192kHz without losing channel count), and another 16 channels of our LStream i/o (at 48kHz, 8 channels at 96kHz and 4 channels at 192kHz). The big difference from the standard PCI AES16 is these channels have their own separate streams, meaning they can carry their own audio - not mirrored from the AES/EBU channels. Currently we offer the LS-ADAT card and LS-AES card to expand the i/o using our LStream channels. LS-ADAT gives you 16 i/o @ 48kHz and LS-AES gives you 8 i/o @ 96kHz. If you really needed a 24-channel 96kHz AES/EBU solution, the AES16e w/LS-AES would do that. The down side is it ends up being a 2-card solution, but then the LS-AES could fit in the slot next to the video card on a Mac Pro (that doesn't have a PCIe connector). If you really need 32-channels of AES/EBU @ 96kHz then you would have to go with two AES16e's, so that would be a 2-card solution anyway.
OK, breaks over - back to work!
David A. Hoatson
Lynx Studio Technology, Inc. |