[linux-audio-dev] Audio synchronization, MIDI API

[Phil Kerr]

Thanks John,

The mouse problem is caused by the kernel missing usbmouse, as I didn't 
have one to test it when I built the kernel (got one now so the next 
build should be ok).

It's great news that it's working with Nvidia cards, this is a mixture 
of X.org's X11R6.7.0 and Jennifer Dillon's modeline XF86Config.

Testing reports are always welcomed as getting feedback on how things 
work on different hardware configs is the best way to shake the bugs 
out.

Regards

Phil


On Tuesday, August 17, 2004, at 12:19  am, John Check wrote:

> On Sunday 15 August 2004 05:48 am, phil at plus24.com wrote:
>> The current top Ethernet standard specifies max transmission speed of
>> 10GBit/sec - 1394b is 800MBit/sec.
>>
>> You can also run Ethernet over Firewire.  IIRC the max. number of
>> devices on a 1394 chain is 63 making Ethernet more suitable for large
>> clusters of interconnected MIDI workstations.
>>
>> But to an extent arguing over which PHY layer is like a Vi / Emacs
>> flamewar.
>>
>> [plug]
>>
>> For a working example of a MIDI over Ethernet (and UDP) have a look at
>> IEEE P1639 (was called DMIDI):
>>
>> www.plus24.com/ieeep1639
>>
>> This acts as a bridge between ALSA and the network so all MIDI apps 
>> can
>> bounce MIDI data between remote machines without any code changes.
>>
>> I'm also working on an embedded Linux for clustering audio 
>> workstations,
>> Live CD available (USB mouse support broken just for now, PS/2 OK):
>>
>> www/plus24.com/m-dist
>>
>> This is also a call for participation in the final development of the
>> standard as well as application development.
>>
>
> I gave m-dist a whirl this afternoon and you my friend, are on the 
> right
> track. I may be able to help with testing.
> For some reason, my USB mouse wasn't autodetected (passing the 
> autoprobe
> option seemed to help) but it locked up once I got a desktop.
> I was impressed that it booted into X because I have an Nvidia card 
> and thats
> always a hassle.
>
>> Regards
>>
>> Phil
>>
>>
>> On Sunday, August 15, 2004, at 09:36  am, Steve Harris wrote:
>>
>> But if youre going to do that, why use ethernet? You'd need dedicated
>> NICs
>> and switches, so you may as well use firewire, which has dedicated
>> realtime channels, more bandwidth and doesnt require switching. 400meg
>> Firewire cards are down to about 7 or 8 euros in the UK now.
>>
>> The only disadvantage is that you can't (right now) cheaply run 
>> firewire
>> over long distances, but taht will change once firewire over CAT5 
>> cards
>> come down in price, and this is rarely an issue with clusters anyway.
>