Re: Problem getting USB DAC to work

2016-07-12 Thread John Westwood
Thanks Alan, I will do that :-) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

Re: Problem getting USB DAC to work

2016-07-11 Thread Alan Stern
On Mon, 11 Jul 2016, John Westwood wrote: > I think the MTP stuff is a red herring. I checked syslog when I use a DAC that > works (Audiolab MDAC) and that has the MTP lines too, but it doesn't have the > warning line about Unlikely big volume range. > > In addition, the working DAC has the follo

Re: Problem getting USB DAC to work

2016-07-11 Thread John Westwood
I think the MTP stuff is a red herring. I checked syslog when I use a DAC that works (Audiolab MDAC) and that has the MTP lines too, but it doesn't have the warning line about Unlikely big volume range. In addition, the working DAC has the following lines which are not present the non-working DAC:

Re: Problem getting USB DAC to work

2016-07-11 Thread John Westwood
I think the kernel is trying to use mtp-probe to acquire the device when it should be using usbcore? The device is a DAC and we want real-time streaming not file transfer which the Media Transfer Protocol (MTP) provides. If this is correct, how do I get the kernel to use usbcore? Thanks -- To un

Problem getting USB DAC to work

2016-07-11 Thread John Westwood
Hello I have an obscure USB DAC, Starting Point Systems DAC3. I cannot get it to work under Linux, it appears to be recognized but does not play sound. On my workstation I use Linux Mint 17.3 and I have disabled PulseAudio and use ALSA instead (I am sure my ALSA config is correct because I have u