Re: Quattro MIDI

[Patrick Shirkey <pshirkey@boosthardware.com>]

Takashi Iwai wrote:
> At Wed, 23 Oct 2002 09:37:31 +0200 (METDST),
> Clemens Ladisch wrote:
> 
>>Takashi Iwai wrote:
>>
>>>Clemens Ladisch wrote:
>>>
>>>>It seems the USB subsystem only loads the first id_table entry it finds
>>>>for each interface. As a quick fix, remove the Quattro entry from
>>>>usbquirks.h, but I'm going to write a patch to use both pcm and MIDI.
>>>
>>>ok, i'll remove it.
>>
>>The Quattro id_table entry matches both PCM and MIDI interfaces because I
>>removed the interface class from most entries nine days ago. I did this
>>because my Roland SC-8820 didn't hotplug because the kernel didn't pass
>>the interface class to the hotplug scripts because the device class isn't
>>zero. However, devices with different interfaces do have device class zero
>>(well, I hope they do :), so using the interface class for matching
>>shouldn't prevent hotplugging for these devices.
>>
>>This patch adds interface class matching for some devices with both PCM
>>and MIDI interfaces.
> 
> 
> thanks!
> committed to cvs now.
> 

I haven't tested this patch yet but from last nights cvs I can report 
that the quattro is giving much better results while using jack.

If I run with lowlat and all the options for latency control I can get a 
pure sine wave from ecasound.

Alsaplayer also performs much better.

I will investigate more obviously :)



-- 
Patrick Shirkey - Boost Hardware Ltd.
For the discerning hardware connoisseur
Http://www.boosthardware.com
Http://www.djcj.org - The Linux Audio Users guide
========================================

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and put_symbol I think we used to have..."
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