Ok, it's a thing that we would like to eliminate, but when I tried to
figure what's going on in the past, I wasn't successful. The best
thing to
measure if ALSA sends a wrong sample sequence to the output is to use the
digital I/O (S/PDIF or profi IEC958) for on playback side and capture the
On Mon, 24 Nov 2003, Mark Knecht wrote:
Ok, it's a thing that we would like to eliminate, but when I tried to
figure what's going on in the past, I wasn't successful. The best
thing to
measure if ALSA sends a wrong sample sequence to the output is to use the
digital I/O (S/PDIF or
Ok, can you force the master rate for HDSP?
Yes, I can force the HDSP master rate to be 44.1KHz.
I can then force the Pro Tools PC be a master also, at 44.1K, but there will
be random clicks and pops since the two are not synced to each other. If I
do this and record on the Pro Tools PC, I get
Then you can compare (maybe via some editor) if the whole
.wav file is in the recorded stream (plus some zero samples at
begging and
end of this stream). Or, you can send me your source and recorded files
and I'll compare them for you (only mark which file is master).
Thomas Jaroslav,
Here's a graphical representation of the noise problem I'm having
using the HDSP 9652. The attached png file shows the wave file I'm
playing on the top line, and then two separate outputs from the HDSP
9652. The two separate Pro Tools captures were done at the same time and
On Wed, 19 Nov 2003, Mark Knecht wrote:
Steve,
You're the first person I can remember to report something very similar
to what I'm dealing with every day. I get a huge loud cracking noise at the
start of any audio operation that is not vanilla Alsa - i.e. - anything
accessing OSS I think.
On Wed, 19 Nov 2003, Steve deRosier wrote:
Mark,
I don't know if it's the same effect or not. We're working on an
embedded Linux device. It has a full Linux kernel and basically is a
hand-built distribution of stock Linux stuff, but is very stripped down
and some of our apps are
Jaroslav,
I certainly want you to know that I have always sensed your commitment to
solving these problems and making Alsa better. I also understand that it's
terribly difficult for you to debug these things at a distance with a putz
like me who isn't a developer, and apparently the only person
Ok, it's a thing that we would like to eliminate, but when I tried to
figure what's going on in the past, I wasn't successful. The best
thing to
measure if ALSA sends a wrong sample sequence to the output is to use the
digital I/O (S/PDIF or profi IEC958) for on playback side and
All,
We're having a problem with some of our audio applications. When a song
starts playing we will often hear a loud pop out of the speakers before
it plays audio. It seems dependent upon where we stoped and the specfic
content of the last song, if we hit our stop control and abort in the
]
Subject: [Alsa-devel] Pops at start of song
All,
We're having a problem with some of our audio applications. When a song
starts playing we will often hear a loud pop out of the speakers before
it plays audio. It seems dependent upon where we stoped and the specfic
content of the last song
-devel] Pops at start of song
All,
We're having a problem with some of our audio applications. When a song
starts playing we will often hear a loud pop out of the speakers before
it plays audio. It seems dependent upon where we stoped and the specfic
content of the last song, if we hit our stop
Hi,
This is not a hardware issue. The problem is that the DAC of your card
gets stopped in some other level than 0V and when you restart playback
the voltage differential causes the pop (because the output of the
digital to analog converter is AC-coupled). To perform a clean stop and
start make
Hm, sounds like the very definition of a hardware issue to me. ;) When I
said hardware issue I wasn't refering to a bug in the hardware or
hardware drivers... more of a that's how it works and we're stuck with
it. :)
One of our other engineers has taken that exact approach. It just seems
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