On 03/01/2015 04:42 PM, Len Ovens wrote: > ice1712 - 16/2 > ens1370 - 32/2 > fw - 32/2 > USB - 64/2 > Intel HDA - 64/3 > > These seem to be based on the size of the HW buffer in the IF itself > and/or the bus protocol in use. AES67 suggests 16/3 (1ms) and I suspect > both FW and USB may bennefit from /3 as well after reading the AES67 > reasoning for 3 buffer use. <pissing contest alert>Fwiw, I can go down to 8/3 with my USB interface ;)</pissing contest alert> > Anyway, all of the things I do for a PCI audio IF, I would also do for > the USB or FW host card. In a desktop machine, I would tend not to trust > any onboard FW or USB hosting, choosing rather to buy a PCIe card and > treat that card the same as I would a PCI(e) audio card. I have found > with USB audio IFs that when setting up /etc/default/rtirq it is best to > single out the USB port I am using for sound. Forgot about that one, I have bought a separate PCIe USB card with a recommended host controller specifically for my USB interface and I also made sure its IRQ gets a high prio. Jeremy
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