[LAU] Focusrite Saffire Pro 40 - reliable?

Jeremy Jongepier jeremy at autostatic.com
Sun Mar 1 15:45:33 UTC 2015

On 03/01/2015 02:51 PM, Robert Jonsson wrote:
> Sorry to go off on a tangent but is USB comparable in performance to
> firewire under linux now? Latency? Number of channels? Mostly I'm asking
> about latency.
> Regards,
> Robert

Hello Robert,

It is comparable though I haven't tested my USB interface with more than
two channels. It runs well at 64/48000*3 (-n3 -p64 -r48000 so 4ms one
way system latency) and it can even run at -n3 -p8 but then I can only
start up Aqualung and listen to a track ;)
I've set up my system in a very similar way like Len described. Some
- RT kernel
- Jack has a RT prio that doesn't interfere with any other RT prio
- snd-hrtimer is loaded and all ALSA seq stuff uses that
- Light desktop environment (LXDE)
- Ext4 is mounted with options for maximum throughput

Basically I set everything up as described here:


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