sonofzev@xxxxxxxxxxxx wrote:
>
> On Wed Jan 21 17:59 , Yan Seiner sent:
>
>
>> sonofzev@xxxxxxxxxxxx wrote:
>>
>>> Thanks Yan
>>>
>>> I did actually read this in my research. The documentation was a little too brief for me to extrapolate out for my needs. It may actually fix another problem I have with the default card but not this issue, which is to setup all MIDI devices in a specific order to make life easy.
>>>
>>> I need all MIDI devices in my setup and I can't intuitively see how this will set the order in which the MIDI ports appear in ALSA (and hence jack midi as a flow on).
>>>
>>> I will try and work it out.. but I just can't see it from this yet.
>>>
>>>
>> Oh well, this won't let you set your cards in order. The only way you
>> can do that is via udev.
>>
>> That wiki entry will allow you to set ALSA_CARD so that you use a
>> specific card of your choosing, no matter where it ends up at....
>>
>> udev really isn't that hard; what you want is to create a symlink
>> incorporating the physical path:
>>
>> KERNEL=="dsp*", \
>> SYMLINK+="sound/$env{PHYSDEVPATH}/dsp"
>>
>> I think that will work.
>>
>> Of course you end up with ridiculous device names like
>>
>> /dev/sound/devices/pci0000:00/0000:00:02.1/usb1/1-1/1-1.4/1-1.4.4/1-1.4.4.4/1-1.4.4.4.1/1-1.4.4.4.1:1.0/dsp
>>
>> (OK, that usb sound card is at the end of a daisy chain of 4 USB hubs,
>> but you get the idea.)
>>
>> You get names that don't change, but are not intuitive by any stretch of
>> the imagination.
>>
>> --Yan
>>
>> )
>>
>
> Cool,
>
> That sets up the device locations in /dev according to their bus location so I'm assuming this sets up the order to be fixed....
> It would be nice to setup them up in a preference order, however, this will probably do.
>
> I'll try this tonight after work
>
Once you get that to work, you can figure out how to match on physical
addresses, and create symlinks that make more sense.
udev is very zen-like; it's utterly incomprehensible until one day the
ghost of Alan Turing whacks you on the back of the head with an old 8K
core board and you shout, "God, why didn't I see that before!"
--Yan
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