Re: [LAU] A2J-MIDI Bridge error

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To: <linux-audio-user@...>
Date: Saturday, December 21, 2013 - 7:06 pm

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On 12/21/2013 03:59 PM, Kevin Utter wrote:

the only sound device I have available at this time is the built-in on-b=
oard sound. Alsamixer reports it as "card: HDA Intel PCH, Chip: Realtech=
ALC892." Apparently my Rolland OctaCapture isn't supported at present, =
or I would be using that.

Hello Kevin,

Using the onboard sound shouldn't be an issue.

> Currently my Jack-2 settings are: =96realtime =96timeout=3D4500 =96no-=
m_lock -d alsa =96device=3DHW:0 =96rate=3D44100 =96period=3D256 =96dither=
=3Dshaped midi=3Dnone. I haven't had a chance to try larger latency yet, =
but I could do that once I'm playing back sequences.=20

Try removing the --no-m_lock setting. You also don't need a --dither
setting, afaik you only need this in very specific usercases.

> Is there any reason to do anything with "nice" on either A2J or anythin=
g else? I think I have most of the recommended optimizations for audio d=
one, except for the rt kernel, but just wondered about nice, since I've s=
een it used, but don't see any recommendations about it.

=46rom the JACK FAQ page "How do I configure my linux system to allow JAC=
K
to use realtime scheduling?" (http://jackaudio.org/linux_rt_config):

"Contrary to a lot of misinformation on the web, there is no reason to
include a line here that provides enhanced "niceness" control, which is
completely irrelevant for realtime scheduling and low latency audio
applications. "

> The uname -a shows:

:57:18 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
f Linux. =20

You could try the Ubuntu low-latency kernel.

Best,

Jeremy

> Thanks much for your help.

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Messages in current thread:
[LAU] A2J-MIDI Bridge error, Kevin Utter, (Fri Dec 20, 5:37 pm)
Re: [LAU] A2J-MIDI Bridge error, Jeremy Jongepier, (Fri Dec 20, 6:58 pm)
Re: [LAU] A2J-MIDI Bridge error, Kevin Utter, (Sat Dec 21, 2:59 pm)
Re: [LAU] A2J-MIDI Bridge error, Jeremy Jongepier, (Sat Dec 21, 7:06 pm)
Re: [LAU] A2J-MIDI Bridge error, Jeremy Jongepier, (Sat Dec 21, 7:11 pm)
Re: [LAU] A2J-MIDI Bridge error, Len Ovens, (Sat Dec 21, 5:04 pm)
[LAU] How to turn off hyperthreading?, david, (Sun Dec 22, 6:34 am)
Re: [LAU] How to turn off hyperthreading?, Gene Heskett, (Sun Dec 22, 9:52 am)
Re: [LAU] How to turn off hyperthreading?, Moshe Werner, (Sun Dec 22, 6:57 am)
Re: [LAU] How to turn off hyperthreading?, david, (Sun Dec 22, 7:24 am)
Re: [LAU] How to turn off hyperthreading?, Len Ovens, (Sun Dec 22, 4:37 pm)
Re: [LAU] How to turn off hyperthreading?, Jeremy Jongepier, (Sun Dec 22, 8:04 pm)
Re: [LAU] How to turn off hyperthreading?, Len Ovens, (Sun Dec 22, 11:25 pm)
Re: [LAU] How to turn off hyperthreading?, Len Ovens, (Sun Dec 22, 9:23 pm)
Re: [LAU] A2J-MIDI Bridge error, Paul Davis, (Fri Dec 20, 6:09 pm)
Re: [LAU] A2J-MIDI Bridge error, Ralf Mardorf, (Fri Dec 20, 6:01 pm)