James, I don't know if this is of any help, but you could always have a
peek at the PortAudio (www.portaudio.com) code (pa_linux_alsa.c). We don't
use snd_pcm_async_handler though, but implement async and blocking IO
ourselves.
Hope this helps
Arve Knudsen
On Thu, 06 May 200
e value which can be returned?
Regards
Arve Knudsen
On Thu, 04 Mar 2004 14:30:08 +0100, Arve Knudsen <[EMAIL PROTECTED]>
wrote:
Hi
A PortAudio user has been experiencing a problem with his SB128 (Ensoniq
AudioPCI driver), which we tracked down to a call to
snd_pcm_hw_params_get_bu
;s
also a "bug" in the documentation for snd_pcm_hw_params_set_buffer_size,
which mentions "dir", although its not part of the function signature.
Thanks
Arve Knudsen
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this helps
Arve Knudsen
On Wed, 04 Feb 2004 18:29:46 -0600, Nathan Morell <[EMAIL PROTECTED]>
wrote:
Hi guys, this is my first note to the list so I'm going to try and get
some background information to start on this task.
After talking with Bill, the author of gkrellm, I need to f
Ah, thanks. That did the trick indeed.
Arve Knudsen
On Sat, 17 Jan 2004 12:18:07 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Fri, 16 Jan 2004, Rene Rebe wrote:
Let's link a normal object and a shared obeject of the ALSAHelper:
[EMAIL PROTECTED]:~/develop/trunk/lowl
similar
problem and who does not appear to be using libtool (correct me here if
I'm mistaken).
Regards
Arve Knudsen
On Fri, 16 Jan 2004 19:57:23 +0100, Takashi Iwai <[EMAIL PROTECTED]> wrote:
At Thu, 15 Jan 2004 15:23:06 +0100,
Arve Knudsen wrote:
Hi
Like I explained in a post som
d as to what was going on .. :)
Regards
Arve Knudsen
On Fri, 16 Jan 2004 20:02:00 +0100 (CET), Rene Rebe <[EMAIL PROTECTED]>
wrote:
Hi all,
we experience a fairly strange problem with the versioned symbols in
the libasound.so. We have a C++ wrapper library which is normally
linked as s
0.1, and drivers compiled into 2.6.1-mm2.
Thanks
Arve Knudsen
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= 8003
0:7a = 57c3
0:7c = 414c
0:7e = 4720
On Wed, 14 Jan 2004 15:02:44 +0100, Takashi Iwai <[EMAIL PROTECTED]> wrote:
At Wed, 14 Jan 2004 14:57:03 +0100,
Arve Knudsen wrote:
On Wed, 14 Jan 2004 14:43:03 +0100, Takashi Iwai <[EMAIL PROTECTED]> wrote:
> At Wed, 14 Jan 2004 13:27:25 +0100,
On Wed, 14 Jan 2004 14:43:03 +0100, Takashi Iwai <[EMAIL PROTECTED]> wrote:
At Wed, 14 Jan 2004 13:27:25 +0100,
Arve Knudsen wrote:
I'm sorry i wasn't being more specific, but from browsing the archive
(http://www.mail-archive.com/[EMAIL PROTECTED]/msg10257.html)
no, it was a
. ALSA-lib is v1.0.1, while ALSA-driver is compiled into
kernel 2.6.1-mm2 (v1.0.1?). The problem is consistent across programs it
seems, specifically my own code and aplay (sets rate to 48000 if I open
hw).
Regards
Arve Knudsen
On Wed, 14 Jan 2004 13:09:05 +0100, Takashi Iwai <[EMAIL PROT
work?
Thanks
Arve Knudsen
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It could have to do with how the particular output plugin is written, or
the (in my opinion) somewhat retarded plugin model of xmms with sleeps
between writes to output.
Regards
Arve Knudsen
On Thu, 08 Jan 2004 15:47:13 +0100, Måns Rullgård <[EMAIL PROTECTED]> wrote:
Kristof vansant &
On Mon, 05 Jan 2004 15:55:46 +, <[EMAIL PROTECTED]> wrote:
Arve Knudsen <[EMAIL PROTECTED]> writes:
My ALSA card is quite capable of doing 44100
Can you verify that the ALSA API is in use, after configuring out OSS
and
JACK? I cannot see why this test should fail, granted your ca
quot;plughw:0,0";
outputParameters.device = paUseHostApiSpecificDeviceSpecification;
outputParameters.hostApiSpecificStreamInfo = &alsaStreamInfo;
It's device string will then be used when opening the output device.
Hope this helps
Arve Knudsen
---
quot;plughw:0,0";
outputParameters.device = paUseHostApiSpecificDeviceSpecification;
outputParameters.hostApiSpecificStreamInfo = &alsaStreamInfo;
It's device string will then be used when opening the output device.
Hope this helps
Arve Knudsen
---
mode could be nonblocking), followed by
snd_pcm_hw_params_any and then snd_pcm_hw_params_get_channels_max. Has
anyone experienced similar behaviour?
Thanks in advance
Arve Knudsen
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On Mon, 05 Jan 2004 09:26:21 +, Nick Ing-Simmons
<[EMAIL PROTECTED]> wrote:
Arve Knudsen <[EMAIL PROTECTED]> writes:
patest_write_sine produces a noise but it isn't a sine wave (by ear
there are some "sharp edges" in the waveform).
That is the potential killer ..
helps
If nothing else it serves as example code for oss/alsa/jack setup.
Will not rule it out.
Appreciate the feedback
Arve Knudsen
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Become an expert in LINUX or just sharpen your
ld you
wish to write cross-platform programs, PortAudio supports different
platforms. I don't know the current state of all the implementations, but
Windows MME and ASIO should be well functional and SGI IRIX seems to be
coming along.
Hope this helps
Arve Knudsen
On Fri, 02 Jan 2004 18:1
On Mon, 15 Dec 2003 09:59:16 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Sun, 14 Dec 2003, Arve Knudsen wrote:
On Mon, 15 Dec 2003 01:17:26 +0900, Patrick Shirkey
<[EMAIL PROTECTED]> wrote:
> If we have a DB of info how would we define the abilities of each
devic
y exclusive access if it is to be modified.
Hope some of this makes sense
Arve Knudsen
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ib I
would think alsa_driver.c would be the place to look.
Hope this helps
Arve Knudsen
On Wed, 10 Dec 2003 00:38:50 -0800, Ryan Cassidy <[EMAIL PROTECTED]>
wrote:
Hello all,
I am trying to understand the specifics of the mechanism that JACK uses
to perform audio duplexing (simultaneous play
On Mon, 8 Dec 2003 17:57:03 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Mon, 8 Dec 2003, Arve Knudsen wrote:
Wether its done via the control or pcm interface, it'd be good to have a
loose coupling between configuration and streams, so one could could
access
configur
in use. Shouldn't we at least
aim for the same flexibility with ALSA?
Regards
Arve Knudsen
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On Mon, 8 Dec 2003 12:39:25 +0100, Frank Barknecht <[EMAIL PROTECTED]>
wrote:
Hallo,
Arve Knudsen hat gesagt: // Arve Knudsen wrote:
On Mon, 8 Dec 2003 11:49:45 +0100, Frank Barknecht <[EMAIL PROTECTED]>
wrote:
>Which reminds me to ask: how does Portaudio currently cope with
>
On Mon, 8 Dec 2003 11:49:45 +0100, Frank Barknecht <[EMAIL PROTECTED]>
wrote:
Hallo,
Arve Knudsen hat gesagt: // Arve Knudsen wrote:
I'm one of the developers responsible for the ALSA implementation of a
cross
platform audio wrapper called PortAudio (www.portaudio.com), which
gathers
On Sun, 7 Dec 2003 21:44:16 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Sun, 7 Dec 2003, Arve Knudsen wrote:
On Sun, 7 Dec 2003 21:00:13 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
> On Sun, 7 Dec 2003, Arve Knudsen wrote:
>
>> > We all
On Sun, 7 Dec 2003 21:00:13 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Sun, 7 Dec 2003, Arve Knudsen wrote:
> We all think in the same way, but there's no simple solution for this
> problem. I prefer to have such configuration information in an
user-space
&g
On Sun, 7 Dec 2003 20:38:48 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Sun, 7 Dec 2003, Arve Knudsen wrote:
On Sun, 07 Dec 2003 14:19:28 -0500, Paul Davis
<[EMAIL PROTECTED]> wrote:
>>>> I'd like to be able to query the capabilities (number of
chann
self as clearly. I am aware of the
Hammerfall problem, as its also somewhat painful in Windows. Logic
Audio never quite coped with it, from what I remember. But there
seems to be a separation between obtaining information about a card,
and actually acquiring it.
Perhaps this could
On Sun, 7 Dec 2003 19:40:23 +0100 (CET), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Sun, 7 Dec 2003, Arve Knudsen wrote:
I'd like to be able to query the capabilities (number of channels,
buffer
size etc.) of ALSA devices in the system, even if they should be in use
by
some ot
is my
current approach, but I'd like to query the devices without first
acquiring exclusive access. If there is currently no way around acquiring
a device for querying, maybe this requirement could be loosened in a
future version of ALSA?
Regards
Ar
a 'Device or
resource busy' message. This is with the number of channels set to 10,
since the number of ADAT channels is halved. Is this a known
defect of the
Hammerfall driver?
Thanks
Arve Knudsen
From the Hammerfall Light Alsa sound card page:
Known bugs
- 96kHz and 88.2kHz not accessibl
bad, I
would like to see this card working as well as under Windows.
Regards
Arve Knudsen
Me too. I own the same card in one of my systems. This is really the
downside to Linux audio. Without dedicated developers that own the cards
and
continue working on improvements support stalls out. The best
to 10,
since the number of ADAT channels is halved. Is this a known
defect of the
Hammerfall driver?
Thanks
Arve Knudsen
From the Hammerfall Light Alsa sound card page:
Known bugs
- 96kHz and 88.2kHz not accessible via PCM interface
Ok, thanks. I suppose I should've investigated a little bett
ect of the
Hammerfall driver?
Thanks
Arve Knudsen
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On Sat, 01 Nov 2003 01:10:27 +0100, Arve Knudsen <[EMAIL PROTECTED]>
wrote:
On Fri, 31 Oct 2003 18:27:16 +0100, Arve Knudsen <[EMAIL PROTECTED]>
wrote:
Hi
Whenever I turn on xrun detection, setting stop_threshold to buffer
size instead of -1, snd_pcm_start refuses to work. The
On Fri, 31 Oct 2003 18:27:16 +0100, Arve Knudsen <[EMAIL PROTECTED]>
wrote:
Hi
Whenever I turn on xrun detection, setting stop_threshold to buffer size
instead of -1, snd_pcm_start refuses to work. The exit message to do
with broken pipe. I figured it might be caused by an empty buffer
frames
available), but it makes no difference. This happens with both my cards,
nForce2 onboard and RME DIGI9636. If someone could point out the cause of
this, I'd truly appreciate it. If it matters I am running a development
kernel, 2.6.0 test9-mm1.
Thanks
Arve Kn
On Fri, 12 Sep 2003 16:51:26 +0200 (METDST), Clemens Ladisch
<[EMAIL PROTECTED]> wrote:
Arve Knudsen wrote:
I did a little test where I set start threshold to buffer size,
acquire memory using snd_pcm_mmap_begin (number of returned frames
equals buffer size), fill the buffer an
On Thu, 11 Sep 2003 14:17:59 +0200 (METDST), Clemens Ladisch
<[EMAIL PROTECTED]> wrote:
Arve Knudsen wrote:
What's the purpose of set_start_threshold?
The stream will automatically start when the buffer has been filled up
to the amount specified by start_threshold.
Ok, obviou
a bit brief regarding
certain things.
Thanks
Arve Knudsen
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[EMAIL PROTECTED]
Hi
Is it safe to call snd_pcm_close for a pcm which failed to open (assuming
the pcm handle is !NULL)? Not that important, but it might simplify my
code somewhat.
Regards
Arve Knudsen
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On Fri, 22 Aug 2003 15:11:08 +0200 (CEST), Jaroslav Kysela <[EMAIL PROTECTED]>
wrote:
On Thu, 21 Aug 2003, Arve Knudsen wrote:
Hi
I'm not sure if I quite understand the alsa-lib docs regarding the
snd_pcm_hw_params API; in addition to an approximate integer value, one
might specify
the
case, couldn't this be handled with floats directly?
Regards
Arve Knudsen
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that I was not able to insert the standalone
alsa modules. I decided to change the drivers in the kernel tree to be
compiled as modules instead of static, and modprobing the snd-rme9652 now
works. I would prefer static linking of this driver though.
Regards
Arve Knudsen
I just installed the 2.6.0 beta kernel to play around a bit, but it seems
my RME 9636 (Hammerfall Lite) isnt recognized. When I do aplay -l, my
nForce2 integrated chip shows up however. I cannot modprobe Alsa kernel
modules either (v0.95). Is this a known problem?
Regards
Arve Knudsen
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