Michael B Allen ha scritto: >On Sat, May 30, 2009 at 2:36 AM, Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote: > > >>It helps if you give information about the sound card, not about yourself. >> >> > >It's not a sound "card". It's a little external box connected by USB. >When I plug it in, it is recognised by the USB layer and installs the >snd-usb-audio module: > >May 30 10:30:20 proton kernel: usb 4-1: new full speed USB device >using uhci_hcd and address 2 >May 30 10:30:20 proton kernel: usb 4-1: configuration #1 chosen from 1 choice >May 30 10:30:20 proton kernel: usb 4-1: New USB device found, >idVendor=0763, idProduct=2010 >May 30 10:30:20 proton kernel: usb 4-1: New USB device strings: Mfr=1, >Product=2, SerialNumber=0 >May 30 10:30:20 proton kernel: usb 4-1: Product: Fast Track >May 30 10:30:20 proton kernel: usb 4-1: Manufacturer: M-Audio >May 30 10:30:21 proton kernel: usbcore: registered new interface >driver snd-usb-audio > >Also a new device is added: > ># cat /proc/asound/cards > 0 [Intel ]: HDA-Intel - HDA Intel > HDA Intel at 0xfe020000 irq 17 > 1 [Track ]: USB-Audio - Fast Track > M-Audio Fast Track at usb-0000:00:1a.1-1, full speed > >However, amixer does not change: > ># amixer info >Card default 'pulse'/'PulseAudio' > Mixer name : 'PulseAudio' > Components : '' > Controls : 4 > Simple ctrls : 2 > >Clearly this is because the PulseAudio server is in the way. > >If I go to the GNOME desktop menu System > Preferences > Hardware > >Sound I now see "USB Audio" under Audio Conferencing : Sound capture >and under Default Mixer Tracks I see an additional 4 entries that >reference "USB Audio" and "Fast Track (Alsa mixer)". > >My ALSA packages seem to have version number 1.0.17. > > > >>The documentation is primarily in the code. One of Alsa's weak points has >>always been documentation. But is it documentation you want or do you want >>your card to work? >> >> > >When I described myself I was informing the list that I am capable of >diagnosing and fixing complex linux issues because I am a seasoned >programmer and have scientific discipline. However, due to the fact >that the sound system on Linux transcends the kernel, user space and >desktop sound server, I am completely at a loss as to where to even >begin. > >I first need to identify the component that may be responsible for >getting capture to work on the Fast Track USB (not "pro" or "ultra"). >Is there no document that describes how ALSA interfaces with the >capture capability of a device? > >Is there a way to debug ALSA so that it will record more information >somewhere that might identify the component(s) responsible. > >What is the communications protocol used over USB to send commands to >this device? > >Mike > > > >>>Ultimately I want to test and characterize small audio circuits and >>>right now I have only a mic level input. I happen to have this M-Audio >>>thing so I was hoping to get a really good high sample rate, high >>>impedance, low noise from it. >>> >>>Mike >>> >>> > >------------------------------------------------------------------------------ >Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT >is a gathering of tech-side developers & brand creativity professionals. Meet >the minds behind Google Creative Lab, Visual Complexity, Processing, & >iPhoneDevCamp as they present alongside digital heavyweights like Barbarian >Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com >_______________________________________________ >Alsa-user mailing list >Alsa-user@xxxxxxxxxxxxxxxxxxxxx >https://lists.sourceforge.net/lists/listinfo/alsa-user > > > ok, maybe I understand something... :'( then, there's a small possibility to find a way to be able to make this audio device works fine? gabriele ------------------------------------------------------------------------------ Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp as they present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://p.sf.net/sfu/creativitycat-com _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
