Hi, I think you have more or less answered your own question, but: On Tue, Jun 03, 2014 at 17:02:30 -0700, chris hermansen wrote: > On Tue, Jun 3, 2014 at 10:44 AM, Daniel Mack <daniel@xxxxxxxxxx> wrote: > > On 06/03/2014 07:26 PM, chris hermansen wrote: > > > usb-audio:2: clock source 19 is not valid, cannot use > > > > Apparently, the clock source selected by the driver reports that it is > > invalid (ie, missing phase lock of a optical link plug), and this is > > what the driver reports. > > Looking at the output of lsusb -v, I see that two terminals refer to > bCSourceID 19: > - INPUT_TERMINAL bTerminalID 5 'SPDIF interface' > - OUTPUT_TERMINAL bTerminalID 10 'USB Streaming' > > But looking at the fields in that Interface Descriptor, I can't see what > links me back to the INPUT or OUTPUT TERMINALs. > > AudioControl Interface Descriptor: > bLength 17 > bDescriptorType 36 > bDescriptorSubtype 2 (INPUT_TERMINAL) > bTerminalID 5 > wTerminalType 0x0605 SPDIF interface > bAssocTerminal 0 > bCSourceID 19 > bNrChannels 2 > bmChannelConfig 0x00000003 > Front Left (FL) > Front Right (FR) > bmControls 0x0040 > Cluster Control (read-only) > iChannelNames 0 > iTerminal 0 > [...] > AudioControl Interface Descriptor: > bLength 12 > bDescriptorType 36 > bDescriptorSubtype 3 (OUTPUT_TERMINAL) > bTerminalID 10 > wTerminalType 0x0101 USB Streaming > bAssocTerminal 0 > bSourceID 5 That is the SPDIF INPUT_TERMINAL. > bCSourceID 19 > bmControls 0x0000 > iTerminal 0 > [...] > AudioControl Interface Descriptor: > bLength 8 > bDescriptorType 36 > bDescriptorSubtype 10 (CLOCK_SOURCE) > bClockID 19 > bmAttributes 0x00 External Clock > bmControls 0x07 > Clock Frequency Control (read/write) > Clock Validity Control (read-only) > bAssocTerminal 0 > iClockSource 0 So CLOCK_SOURCE 19 is an external clock from the optical input, only used when using an SPDIF input, and only usable when an optical input is connected. Just to make things a bit more confusing, the SPDIF interface of the CM6631 isn't connected to anything in the Schiit Bifrost, it uses a separate CS8416 for SPDIF input. So I would expect the "clock source 19 is not valid, cannot use" message to show up even when connected to an optical input. Torstein ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
