GOT IT!
I'd forgotten to change the code that registers the jack
output ports; it was using the same name each time.
So apparently my de-interleaving code was fine
(though it's a bit more efficient now, thanks for the hint John.)
Houston, we have stereo.
--PW
On Fri, Jun 14, 2002 at 01:31:39A
On Thu, Jun 13, 2002 at 06:11:52PM -0400, rm wrote:
> On Thu, Jun 13, 2002 at 04:42:55PM -0400, Paul Winkler wrote:
> > Something's odd here...
> > I'm trying to de-interleave the stereo output from sfront
> > into discrete channel buffers suitable for jack. Everything's
> > fine when number of ch
This prompted me to look at my course notes, and here's a quote:
"A patent may be granted for an invention only if
following conditions are satisfied:
" The invention is new;
" It involves an inventive step;
" It is capable of industrial application;
" The grant for a patent for it is not exclud
On Thu, Jun 13, 2002 at 04:42:55PM -0400, Paul Winkler wrote:
> Something's odd here...
> I'm trying to de-interleave the stereo output from sfront
> into discrete channel buffers suitable for jack. Everything's
> fine when number of channels = 1; but when it's 2, it seems
> that I get the left ch
No, but this is the reason why most organ consoles have a mirror allowing
the organist to watch the conductor and why in many cathedrals there is a
separately located set of pipes for use with choral music (generally
controlled by an upper manual, labelled "choir"). As long as the organist
follows
On Thu, Jun 13, 2002 at 12:41:52 -0400, Paul Winkler wrote:
> > Nonsense! What about tubas ?
> > I admit a guitar would feel pretty awful w/ 10 ms latency,
>
> And yet electric guitarists do it all the time. Ever stood 10 feet away
> from your amp? It's no big deal, you get used to it.
Thats tr
Something's odd here...
I'm trying to de-interleave the stereo output from sfront
into discrete channel buffers suitable for jack. Everything's
fine when number of channels = 1; but when it's 2, it seems
that I get the left channel in both outputs. I've confirmed
that the left and right outputs ar
On Thu, Jun 13, 2002 at 01:29:11PM +, Charlieb wrote:
>
>
> *
> Charlie Baker [EMAIL PROTECTED]
> "when everything isn't roses, you don't get
>any headroom" - Thomas Dolby "New Toy"
> *
>
> The pipe organ example is a good one - there is a huge variety of delay on
> pipe organs, probably beyond the half second (I don't have the figures, but
> there's often a significant delay between keypress and note as well as the
> acoustic delay). I'm fine with small delays, but fast passages
On Thu, 2002-06-13 at 01:39, Dan Hollis wrote:
> "We hold a patent on MaGIC"
Curious.
--
Bob Ham: [EMAIL PROTECTED] http://pkl.net/~node/
My music: http://mp3.com/obelisk_uk
GNU Hurd: http://hurd.gnu.org/
On Thu, 13 Jun 2002, Fred Gleason wrote:
> On Wednesday 12 June 2002 16:37, Billy Biggs wrote:
>
> > I see only two options: Go all the way, ask all users to pay, lose
> > personal ownership of the project and turn it into a product, or ask
> > nothing and expect nothing. Anything in between p
> How about the 1.0-1.5 ms latencies that everbody tries to obtain (or
already
> has) in both Linux/Win world? That always made me wonder if this isn't
just
> hype like the 192 kHz issue.
>
> I'm not a professional musician, but a 25 ms latency makes me more than
> happy.
I would say that for pla
In my experience, audible separation of acoustic events normally happens
around 20ms (ignoring phase effects). Most instruments (including guitar)
are entirely playable with this sort of delay.
The pipe organ example is a good one - there is a huge variety of delay on
pipe organs, probably beyond
On Thursday 13 June 2002 13:15, xk wrote:
> I'm not a professional musician, but a 25 ms latency makes me more than
> happy.
It really depends upon the specific application. For some problem-spaces
(radio automation, for example), latency is just not a very important issue.
For others (e.g. l
On Thursday 13 June 2002 11:59 am, dgm4 wrote:
> Lamar Owen wrote:
> >French Horn. Its bore is as long as a tuba's. I have played horn before,
> > and there is a definite, barely detectable delay between initiation of
> > the note and the perception of the note (which is both by ear and by hand
> You certainly can't play an instrument with 10ms latency.
See:
http://ccrma-www.stanford.edu/groups/soundwire/delay_p.html
http://www-ccrma.stanford.edu/groups/soundwire/delay.html
http://www-ccrma.stanford.edu/groups/soundwire/WAN_aug17.html
These experiments show the limits of musical laten
Not really hype, they are slightly different issues.
(I work with Barry and we discussed this issue earlier)
Achieving system latencies down to 1 - 2 ms is good as it's an indication of
the overall latency of the system. Typically a system can spike at a lot
higher than the values you mention
> There's a psychoacoustic phenomenon known as the Haas effect which states
> that a direct sound and it reflections (echos) are percieved as a single
> sound by the brain, where the time difference between the two is less than
> about 30ms. So if the brain can't distinguish between sounds at this
Ok, ahm,
as I somehow clicked too fast the last time, I don't need to quote the
email. I just want to thank you for your wishes
on the group photo :-)
Hope I'll be there next year!
Cheers, Alex
On Thursday, June 13, 2002, at 01:11 PM, Joern Nettingsmeier wrote:
> hello everyone !
>
> the photos from the joint LAD/ALSA booth at LinuxTag 2002 in
> karlsruhe/germany are now available at
> http://www.linuxdj.com/audio/lad/events.php3 .
>
> those who asked for t-shirts will find a link to t
Lamar Owen wrote:
>On Thursday 13 June 2002 09:29 am, Charlieb wrote:
>
>>On Thu, 13 Jun 2002, Steve Harris wrote:
>>
>>>MAS works over LANs, and should be capable of 10ms latency, which isn't
>>>very low by BTW. You certainly can't play an instrument with 10ms
>>>latency.
>>>
>
>>Nonsense! What
> > >You certainly can't play an instrument with 10ms
> > > latency.
> >
>
>
>Really? You might want to check my math on this, but if the speed of sound
>in air at 75 degrees F is about 1135 feet/second, then it takes about
>0.00088 seconds, or 0.88 ms, for the sound to travel 1 foot. So in 1
On Wed, 12 Jun 2002, Steve Harris wrote:
> Have a look at MAS, they had an impressive demo at LinuxTag:
> http://mediaapplicationserver.net/
>
> It works with X but doesn't require it IIRC.
>
> That API is not that similar to jack, but hey.
Thanks for mentioning us, Steve!
We're focused on netw
On Wednesday 12 June 2002 16:37, Billy Biggs wrote:
> I see only two options: Go all the way, ask all users to pay, lose
> personal ownership of the project and turn it into a product, or ask
> nothing and expect nothing. Anything in between puts everyone in a bad
> position: users might fee
On Thu, Jun 13, 2002 at 09:43:44 -0400, Lamar Owen wrote:
[latency and instruments]
> there is a definite, barely detectable delay between initiation of the note
> and the perception of the note (which is both by ear and by hand in the case
> of the horn). The long bore is one reason the horn's
> > MAS works over LANs, and should be capable of 10ms latency, which isn't
> > very low by BTW. You certainly can't play an instrument with 10ms
> > latency.
>
Really? You might want to check my math on this, but if the speed of sound
in air at 75 degrees F is about 1135 feet/second, then it ta
On Thu, Jun 13, 2002 at 02:02:49 +0200, Dave Griffiths wrote:
> One of the things I'm always slightly disappointed in Linux apps (including my
> own) is the lack of originality of interface and ideas, too many clones of
> existing solutions - when we have the freedom and lack of commercial worries
On Thu, Jun 13, 2002 at 01:29:11 +, Charlieb wrote:
> > MAS works over LANs, and should be capable of 10ms latency, which isn't
> > very low by BTW. You certainly can't play an instrument with 10ms
> > latency.
>
> Nonsense! What about tubas ?
> I admit a guitar would feel pretty awful w/ 10
> You certainly can't play an instrument with 10ms
> latency.
in 10ms sound travels somewhat more than 3 meters.
that why i use nearfield monitors :)
--martijn
On Thursday 13 June 2002 09:29 am, Charlieb wrote:
> On Thu, 13 Jun 2002, Steve Harris wrote:
> > MAS works over LANs, and should be capable of 10ms latency, which isn't
> > very low by BTW. You certainly can't play an instrument with 10ms
> > latency.
> Nonsense! What about tubas ?
> I admit a g
Ok so I hit play in Ardour, here is what I got
numid=13,iface=PCM,name='Output Peak',index=1
; type=INTEGER,access=r,values=2,min=0,max=0,step=0
: values=0,0
numid=13,iface=PCM,name='Output Peak',index=1
; type=INTEGER,access=r,values=2,min=0,max=0,step=0
: values=0,0
numid=13,ifa
*
Charlie Baker [EMAIL PROTECTED]
"when everything isn't roses, you don't get
any headroom" - Thomas Dolby "New Toy"
*
On Thu, 13 Jun 2002, Steve Harris wrote:
> On Thu, Jun 13, 2002 at 11
On Thu, Jun 13, 2002 at 11:45:13 +0200, Men Muheim wrote:
> Thanx for the info. Unfortunately it does not really get clear to me
> what the project does. I think the difference to my approach is that I
> am talking about LAN and low latency (10ms)
MAS works over LANs, and should be capable of 10m
> The problem seems to be either...
>
> A) That there aren't enough of these people to go around.
>
> B) That these people aren't in touch with the people who want to
> write code, or just have a hard time coordinating with them.
>
> or C) That these people aren't very deeply invol
hello everyone !
the photos from the joint LAD/ALSA booth at LinuxTag 2002 in
karlsruhe/germany are now available at
http://www.linuxdj.com/audio/lad/events.php3 .
those who asked for t-shirts will find a link to the image there. it's
probably easier to find a print shop close to you and roll y
Chris Butt wrote:
>
>
> But yeah, could something like agnula or the lad site have a 'so you
> want to help but you can't compile alsa' or 'things for people with
> little skill but enthusiasm'?
sounds like a very good idea to me. i'll think about it some more.
ideas welcome. (preferably off-li
> Indeed I have and it is, in fact, what I plan to be spending most of
> this summer working on. I don't know if you've seen gison's magic,
but
> it sounds very similar what you're doing:
>
> http://magic.gibson.com/
Looks interesting. Thanks for the info.
Magic seems to be a "network like" r
> Concerning the timing issues, one of the problem raised by audio
> transmission is the audio cards clock skew of the different stations
> involved in the transmission.
> I've done some work on this topic. It's available as a technical
report at
> ftp://ftp.grame.fr/pub/Documents/AudioClockSkew.p
Thanx for the info. Unfortunately it does not really get clear to me
what the project does. I think the difference to my approach is that I
am talking about LAN and low latency (10ms)
Men
> -Original Message-
> From: [EMAIL PROTECTED]
[mailto:linux-audio-dev-
> [EMAIL PROTECTED]] On Beha
Peter Hanappe wrote:
>
>I wondered if it would be possible to write a JACK driver (i.e.
>replacement for current ALSA driver) that would stream the audio over
>a network. The driver is a shared object, so it's technically possible.
>I was thinking of the timing issues.
>
Concerning the timing iss
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