Thread: [jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu 7.10

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jazzplusplus-devel

[jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu 7.10

From: Pete S. <pst...@gm...> - 2008-05-22 05:02:59

Just wanted to report this.  Unfortunately, the qjackctl/qsynth/Jazz++ 
playback exhibited more latency problems than I have heard on any other 
distribution/OS.

I'll post the kernel configuration at a later date.  Maybe I have 
something configured incorrectly.
Pete

Re: [jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu 7.10

From: D.B. M. <db...@ho...> - 2008-05-22 05:55:55

Greetings,


----------------------------------------
> Date: Thu, 22 May 2008 05:02:50 -0700
> Subject: [jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu 7.10
> 
> Just wanted to report this.  Unfortunately, the qjackctl/qsynth/Jazz++ 
> playback exhibited more latency problems than I have heard on any other 
> distribution/OS.

Oh dear....I was expecting this of sorts. There are a number of threads
out there related to kernel latency issues in Ubuntu ...

One thread I saw from a developer read something like..."it appears
that the Ubuntu developers have made every effort to make a linux
kernel upgrade next to impossible for users to successfully complete
on Ubuntu installations"

Note - I am *not* 'distro-centric'  - I am just the reporting scribe ;-)

> 
> I'll post the kernel configuration at a later date.  Maybe I have 
> something configured incorrectly.
> Pete

Please do - you can imagine how many 'FAQ' entries are going
to be directly related to one linux distro or another, and I do 
intend to document such things as they obviate themselves..

One thing you might check, is that artsd isn't trying to keep hold 
of the sound device....(I recall seeing something along this line)


On a bright and useful note with this, I am dedicating a system box
here specifically for testing Jazz++ on various linux distros - this 
should help uncover things like this, and help me create useful
docs targetting what specific linux distro users need to do to
get Jazz++ running (properly..) on the distro of their choice.

The machine isn't running yet (still got to finish it off), but I'll
annouce it again (along with specs) just as soon as it's up and running.


Regards,

Donald B  

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Re: [jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu 7.10

From: Pete S. <pst...@gm...> - 2008-05-26 18:17:12

Attachments: config-2.6.22-14-generic.gz

PS = Pete Stieber
PS>> Just wanted to report this.  Unfortunately, the
PS>> qjackctl/qsynth/Jazz++ playback exhibited more
PS>> latency problems than I have heard on any other
PS>> distribution/OS.

DM = D.B. Moore
DM> Oh dear....I was expecting this of sorts. There are
DM> a number of threads out there related to kernel
DM latency issues in Ubuntu ...
DM>
DM> One thread I saw from a developer read something
DM> like..."it appears that the Ubuntu developers have
DM> made every effort to make a linux kernel upgrade
DM> next to impossible for users to successfully complete
DM> on Ubuntu installations"
DM>
DM> Note - I am *not* 'distro-centric'  - I am just the
DM> reporting scribe ;-)

PS>> I'll post the kernel configuration at a later date.
PS>> Maybe I have  something configured incorrectly.

DM> Please do - you can imagine how many 'FAQ' entries
DM> are going to be directly related to one linux distro
DM> or another, and I do intend to document such things
DM> as they obviate themselves.

The config file for the Ubuntu 7.10 setup with latency problems is attached.

DM> One thing you might check, is that artsd isn't trying
DM> to keep hold of the sound device....(I recall seeing
DM> something along this line)

Unfortunately, the Ubuntu disk I was experimenting on goes in my main 
development box (the one I'm writing this email with) and I can't switch 
to try this at the moment.

DM> On a bright and useful note with this, I am dedicating
DM> a system box here specifically for testing Jazz++ on
DM> various linux distros - this should help uncover things
DM> like this, and help me create useful docs targetting
DM> what specific linux distro users need to do to
DM> get Jazz++ running (properly..) on the distro of their
DM> choice.
DM>
DM> The machine isn't running yet (still got to finish it
DM> off), but I'll annouce it again (along with specs) just
DM> as soon as it's up and running.

I have my new Dell Precision T3400 that holds a Core 2 Extreme Q6850 
quad core processor running at 3GHz setup with a SATA drive bay.  The 
disk that came with the machine (230GB) is my primary development 
environment (Windows XP + Visual Studio).  I have 4 other 80 GB SATA 
drives I can pop into the machine.  So far I have Fedora 9 and Ubuntu 
7.10 on two of these drives.

I also have an old ASUS A7N8X Deluxe MB that holds an AMD Athlon (I 
don't remember the speed) that I am running Mandriva 2008.0 on.  It too 
has an IDE drive bay, so I may be able to try a few disrtos there.

I also have a Mac mini to work on the Mac port.

Pete

Re: [jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu 7.10

From: D.B. M. <db...@ho...> - 2008-05-26 20:44:16

Greets,

----------------------------------------
> Date: Mon, 26 May 2008 18:17:03 -0700
> Subject: Re: [jazzplusplus-devel] Successful Jazz++ build and run on Ubuntu	7.10
> 
> PS = Pete Stieber
> PS>> Just wanted to report this.  Unfortunately, the
> PS>> qjackctl/qsynth/Jazz++ playback exhibited more
> PS>> latency problems than I have heard on any other
> PS>> distribution/OS.
> 
> DM = D.B. Moore
> DM> Oh dear....I was expecting this of sorts. There are
> DM> a number of threads out there related to kernel
> DM latency issues in Ubuntu ...
> DM>
> DM> One thread I saw from a developer read something
> DM> like..."it appears that the Ubuntu developers have
> DM> made every effort to make a linux kernel upgrade
> DM> next to impossible for users to successfully complete
> DM> on Ubuntu installations"
> DM>
> DM> Note - I am *not* 'distro-centric'  - I am just the
> DM> reporting scribe ;-)
> 
> PS>> I'll post the kernel configuration at a later date.
> PS>> Maybe I have  something configured incorrectly.
> 
> DM> Please do - you can imagine how many 'FAQ' entries
> DM> are going to be directly related to one linux distro
> DM> or another, and I do intend to document such things
> DM> as they obviate themselves.
> 
> PS>> The config file for the Ubuntu 7.10 setup with latency problems is attached.
 
This kernel isn't too much different from the mandriva makeup, expecting
one critical thing -- CONFIG_HZ = 250

I doubt it could've run the softsynth oscillators accurately with
that setting - it would've sounded disturbingly distorted...


Regards,

Donald B


PS: the ubuntu kernel has a lot of stuff builtin that people should
never need.....
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