[linux-audio-user] Sound Blaster Live External USB does not work with jack

Peter Butler peter.butler at 141.com
Thu Aug 4 03:32:49 EDT 2005


> Probably jack uses another sample format, Could you try using jack
> with two channels and 16 bits?
> 
>>Also the USB MIDI interface seems to have stopped working with this kernel.
> 
> Make sure that the OSS driver (usb-midi) is _not_ loaded.

Thanks again for your help.  I submitted a bug report to the Ubuntu 
kernel package maintainer and CONFIG_USB_BANDWIDTH is no longer set in 
the default Ubuntu kernel (fixed in 2.6.12-5.5).  I also managed to make 
this work under 2.6.11 by increasing Periods/Buffer to 2, Frames/Period 
to 2048 and choosing "Force 16 bit" in Jack.

It works ok but with high latency (~90ms).  This is OK for me, I'm a 
hobbyist.  Also from what I understand USB audio has problems with 
latency under Jack.

Thanks again,

Peter



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