[PD] Fw: Latency

[Dan Wilcox]

Are you sure you really get 24 bit duplex? I don't think USB 1.1 has enough bandwidth. I was burned during a show at STEIM by accidentally switching the advanced switch on and the USB bus threw a kernel panic as soon as I hit a song with an [adc~]. Took me a while to figure that one out.

Sent from my phone.
-------------
Dan Wilcox
robotcowboy.com
danomatika.com

On Sep 18, 2010, at 2:59 PM, Claude Heiland-Allen <claudiusmaximus at goto10.org> wrote:

> On 18/09/10 00:44, Dan Wilcox wrote:
>> 
>> On Sep 17, 2010, at 5:39 PM, Ed Kelly wrote:
>> 
>>> I will sell my FA-101 and get a UA!
>> 
>> ... the UA-25 only has 2 ins and outs at 16bit, you can do 2 in at 24bit or 2 out at 24 bit, but not full duplex.
> 
> I think it's slightly more complicated than that!
> 
> With my UA-25 I get full duplex at 24bit with the sample rate switch set to 44.1kHz and 48kHz (and the advance mode switch set to 'on', in case that matters).  At 96kHz it is probably different, but I never tried that yet.  (This is with the original UA-25, which I believe has been discontinued - the later versions may have different behaviour.)
> 
> From my qjackctl messages pane:
> --8<----8<--
> apparent rate = 44100
> creating alsa driver ... hw:1|hw:1|256|3|44100|2|2|nomon|swmeter|-|32bit
> control device hw:1
> configuring for 44100Hz, period = 256 frames (5.8 ms), buffer = 3 periods
> ALSA: final selected sample format for capture: 24bit little-endian
> ALSA: use 3 periods for capture
> ALSA: final selected sample format for playback: 24bit little-endian
> ALSA: use 3 periods for playback
> --8<----8<--
> 
> 
> Claude