Re: [LAU] Focusrite Scarlett 18i8

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To: A list for linux audio users <linux-audio-user@...>
Date: Saturday, January 11, 2014 - 10:20 am

On Fri, Jan 10, 2014 at 11:20 PM, Fons Adriaensen wrote:

It's reported as -81dB on line-in with jnoisemeter.

The mic stage when turned right up (for my cheap SM57 copy) has
background noise of -65 dB (with mic still on, and quite a bit of
background noise, so not a great test), when the mic is switched off
(but still connected) it is -95dB. In practice, it doesn't seem that
noisy to my uneducated ears, but I guess others will have different
opinions.

The one thing I would say is that I am not that impressed with
realtime performance overall. It is really only stable down to about
128/2. If I use Mixbus, I have to use 256/2 on jack. According to
jack_iodelay this is around 27ms round trip. However, despite this, I
haven't really noticed any audible delay that makes recording
difficult. 128/3 seems better - around 15ms round trip according to
jack_iodelay.

With a realtime kernel - 3.6.4-bbq-rt-rt10, I can push jack right down
to 64/2 - (approx 10ms round trip according to jack_iodelay) but this
leads to xruns with minor stresses on the CPU.

James
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Messages in current thread:
[LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Tue Jan 7, 3:10 pm)
Re: [LAU] Focusrite Scarlett 18i8, Robin Gareus, (Wed Jan 8, 4:06 am)
Re: [LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Wed Jan 8, 1:41 pm)
Re: [LAU] Focusrite Scarlett 18i8, Robin Gareus, (Wed Jan 8, 2:52 pm)
Re: [LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Wed Jan 8, 3:43 pm)
Re: [LAU] Focusrite Scarlett 18i8, Robin Gareus, (Wed Jan 8, 4:04 pm)
Re: [LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Wed Jan 8, 10:21 pm)
Re: [LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Wed Jan 8, 4:24 pm)
Re: [LAU] Focusrite Scarlett 18i8, Jeremy Jongepier, (Wed Jan 8, 8:40 am)
Re: [LAU] Focusrite Scarlett 18i8, James Stone, (Fri Jan 10, 8:42 pm)
Re: [LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Fri Jan 10, 10:20 pm)
Re: [LAU] Focusrite Scarlett 18i8, James Stone, (Fri Jan 10, 10:48 pm)
Re: [LAU] Focusrite Scarlett 18i8, Fons Adriaensen, (Fri Jan 10, 11:20 pm)
Re: [LAU] Focusrite Scarlett 18i8, James Stone, (Sat Jan 11, 10:20 am)
Re: [LAU] Focusrite Scarlett 18i8, Tim Goetze, (Wed Jan 8, 9:37 am)
Re: [LAU] Focusrite Scarlett 18i8, James Stone, (Thu Jan 9, 9:23 pm)
Re: [LAU] Focusrite 2i4, Tim Goetze, (Fri Jan 10, 10:33 am)
Re: [LAU] Focusrite 2i4, James Stone, (Fri Jan 10, 10:40 am)
Re: [LAU] Focusrite 2i4, Tim Goetze, (Mon Jan 27, 2:34 pm)
Re: [LAU] Focusrite 2i4, James Stone, (Mon Jan 27, 2:44 pm)
Re: [LAU] Focusrite 2i4, Tim Goetze, (Fri Jan 10, 11:33 am)
Re: [LAU] Focusrite 2i4, Kees van Veen, (Fri Jan 10, 4:30 pm)
Re: [LAU] Focusrite 2i4, Tim Goetze, (Mon Jan 13, 8:58 am)
Re: [LAU] Focusrite 2i4, James Stone, (Mon Jan 13, 10:49 am)
Re: [LAU] Focusrite 2i4, Tim Goetze, (Mon Jan 13, 12:25 pm)
Re: [LAU] Focusrite 2i4, James Stone, (Sat Jan 11, 7:52 pm)
Re: [LAU] Focusrite 2i4, Jeremy Jongepier, (Sat Jan 11, 10:22 pm)
Re: [LAU] Focusrite 2i4, Kees van Veen, (Sun Jan 12, 9:19 pm)
Re: [LAU] Focusrite Scarlett 18i8, James Stone, (Wed Jan 8, 10:55 am)
Re: [LAU] Focusrite 2i4, Tim Goetze, (Wed Jan 8, 12:07 pm)