On Tue, Apr 28, 2009 at 11:59:36PM +0200, Lennart Poettering wrote: I know, but 0. I've had flexible hotplugging setups before, so what's the point ?

1. I *want* stable indices, and

2. according to the info on the CCRMA site the modproble lines above should give me stable indices. If not, has ALSA been mutilated to ignore these lines ?

Well, I don't care how I would do it so long as I can finally find a way to do it. I want to load up 1 box with 4 sound cards (preferably el cheapo USB cards) and hoot the outputs of 4 radios to the inputs of the cards. (I prefer identical cards if possible.) I want to tune each radio to a different station and record each 24x7. now I want the stations to record consistently. So far I have not run across a solution that didn't assume different cards. Any ideas anyone/ all the best,

On Wednesday 29 April 2009 07:45:08 Simon Fielding wrote: Thanks, I have got to try this out... And remember to report back... drew _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev

Doing these things with indexes is just broken. It's like network interfaces. Everybody learned to use names for them instead of the low-level ifindex. Now it's time people learn the same for audio devices.

Why?

it could be that many ppl are using qjactcl and the latter may not be as flexible as the command line. I am not in front of my DAW so it is just speculations. Rui could comment on qjackctl's ability to select an ALSA device by name instead of the usual hw:n. Since I have not fiddled with this for ages, I simply cannot remember. J.

On Wed, Apr 29, 2009 at 5:09 AM, Fons Adriaensen <fons(a)kokkinizita.net> wrote: jack ... -d alsa -d AnyALSA:deviceName,WillDo ....

From: hollunder(a)gmx.at <hollunder(a)gmx.at> Subject: Re: [LAD] alsa card order To: linux-audio-dev(a)lists.linuxaudio.org Date: Wednesday, April 29, 2009, 12:12 PM On Wed, 29 Apr 2009 17:55:28 +0200 Fons Adriaensen <fons(a)kokkinizita.net> wrote: wrote: without e.g. .... speakers speakers Subwoofer speakers samples (capture) at irq 17 21 In my case, excerpt of aplay -L: ... default:CARD=UA25 UA-25, USB Audio Default Audio Device ... In qjackctl: hw:UA25 So for the terratec that would be: hw:EWS88MT aplay -l lists the usable subdevices as well, usually you can use them with like hw:0,2 or something like that, so I guess [devicename],[subdevicenumber] could work as well. HTH Regards, Philipp _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev

Doing these things with indexes is just broken. It's like network interfaces. Everybody learned to use names for them instead of the low-level ifindex. Now it's time people learn the same for audio devices.

Slow day at work so I've been doing some testing. I'm using Fedora 11 preview on my spare R&D PC. I've got a Behringer UMA25S which is a 25 key MIDI keyboard with built in USB soundcard. I haven't removed anything from F11 so pulseaudio et al is still installed. Problem 1 F11 no longer loads snd_seq (oss support which loads snd_seq conflicts with PA). I just manually modprobe'd snd_seq pending a proper fix. Action 1 Plug everything in. Run the following command for each device in /dev/snd udevadm info -a -p $(udevadm info -q path -n /dev/snd/DEVICE_NAME) and save the outputs. You can use these to determine how to specify an individual device/card in the udev rules. Action 2 I added the following lines to /etc/udev/rules/90-alsa.rules (each line starts with either # (for a comment) or KERNEL so if your mail reader breaks them up, join them back together. You will need different tests to identify your individual cards using the information gathered above :- # Make HDA Intel Card0 always KERNEL=="controlC*", SUBSYSTEM=="sound", DRIVERS=="HDA Intel", NAME="snd/controlC0" KERNEL=="hw*", SUBSYSTEM=="sound", ATTR{name}=="Realtek ALC880", NAME="snd/hwC0D2" KERNEL=="pcmC*c", SUBSYSTEM=="sound", DRIVERS=="HDA Intel", NAME="snd/pcmC0D0c" KERNEL=="pcmC*p", SUBSYSTEM=="sound", DRIVERS=="HDA Intel", NAME="snd/pcmC0D0p" # Make UMA25S Midi Card3 KERNEL=="midi*", SUBSYSTEM=="sound", ATTRS{product}=="UMA25S", ATTRS{manufacturer}=="BEHRINGER", NAME="snd/midiC3D0" KERNEL=="controlC*", SUBSYSTEM=="sound", ATTRS{product}=="UMA25S", ATTRS{manufacturer}=="BEHRINGER", NAME="snd/controlC3" # Make UMA25S Sound Card1 if in left front USB port KERNEL=="controlC*", SUBSYSTEM=="sound", ATTRS{busnum}=="2", ATTRS{devnum}=="5", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/controlC1" KERNEL=="pcmC*c", SUBSYSTEM=="sound", ATTRS{busnum}=="2", ATTRS{devnum}=="5", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/pcmC1D0c" KERNEL=="pcmC*p", SUBSYSTEM=="sound", ATTRS{busnum}=="2", ATTRS{devnum}=="5", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/pcmC1D0p" # Make UMA25S Sound Card2 if NOT in left front USB port # On a different USB bus KERNEL=="controlC*", SUBSYSTEM=="sound", ATTRS{busnum}!="2", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/controlC2" KERNEL=="pcmC*c", SUBSYSTEM=="sound", ATTRS{busnum}!="2", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/pcmC2D0c" KERNEL=="pcmC*p", SUBSYSTEM=="sound", ATTRS{busnum}!="2", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/pcmC2D0p" # Same USB bus, Different port KERNEL=="controlC*", SUBSYSTEM=="sound", ATTRS{busnum}=="2", ATTRS{devnum}!="5", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/controlC2" KERNEL=="pcmC*c", SUBSYSTEM=="sound", ATTRS{busnum}=="2", ATTRS{devnum}! ="5", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/pcmC2D0c" KERNEL=="pcmC*p", SUBSYSTEM=="sound", ATTRS{busnum}=="2", ATTRS{devnum}! ="5", ATTRS{product}=="USB Audio CODEC*", ATTRS{manufacturer}=="Burr-Brown from TI*", NAME="snd/pcmC2D0p" Action 3 Reboot and test it all. I started qjackctl and the USB soundcard showed up fine as card 1. I fired up a whysynth and connected the keyboard through jack - sound worked fine. Then I stopped jack, unplugged the UMA25 and tried a different USB port - even better, it now showed up as card2 in qjackctl and still worked once I told qjackctl to use card2 now. Problem 2 Move the card back to the original USB port and try again. It still shows as card2 ! A little investigation (lsusb) showed that although the card was back in the same place, it no longer had devnum==5. Each time you unplug and replug the device, even into the same physical socket, it gets a new devnum. This means that the usb devnum is not a reliable way of uniquely identifying a usb soundcard. Problem 3 /proc/asound/cards etc no longer correctly reflect the card numbers/names. This doesn't seem to affect Jack but I'm not sure where to start tracking this down to fix it. Perhaps someone with a bit more knowledge could take a look at this. Conclusion All told, a bit of a mixed bag of results but hopefully this may help someone to start a little further investigation and maybe we can make the udev/alsa combination do what is needed. Cheers, Simon _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev

On Tue, 28.04.09 23:36, Fons Adriaensen (fons(a)kokkinizita.net) wrote: Since F10 ALSA card indexes are not stable anymore to allow flexible hotplugging setups. You don't need stable indexes. Simply use the card names instead. You can find them in /proc/asound/cards. i.e. use "front:AudioPCI" instead of "front:6" as device strings. That way you don''t need to configure anything and always have stable device strings.

Lennart

Fons Adriaensen wrote:

"options" does not work with aliases; use: options snd-intel8x0 index=0 ...

Since ALSA 1.0.16, you can instead use: options snd slots=snd-intel8x0,snd-mpu401,snd-ice1712