[Openal] repeated "buzz" while streaming with openAL

[Simon MAZUE]

Hi,

I don't know how it could happen as for each buffer, I collect the exact
number of bytes of the buffer.
Nethertheless, is there a way to know if I copy non-audio data in the buffer
(and which type of data) or if it is something else ?

Simon MAZUE


On 9/17/07, Daniel PEACOCK <dpeacock at creativelabs.com> wrote:
>
> Hi Simon,
>
> Could it be that some non-audio data is accidently being copied to the
> beginning (or end) of each AL Buffer in your playback code?
>
> Dan
> Creative Labs, Inc.
>
> ------------------------------
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> [image: Inactive hide details for Simon MAZUE <smazue at gmail.com>]Simon
> MAZUE <smazue at gmail.com>
>
>
>
>     *Simon MAZUE <smazue at gmail.com>*
>             Sent by: openal-bounces at opensource.creative.com
>
>             09/17/2007 12:39 AM
>
>
> To
>
> openal at opensource.creative.com
> cc
>
>
> Subject
>
> Re: [Openal] repeated "buzz" while streaming with openAL
>
>
> Hello,
>
> Thank you for your answers but I tried the two changes (10 buffers of
> 17640
> bytes and capture at 48000 hz) and the "buzz" is still here. However, it's
> much more frequent with the smaller buffer size. So, it seems that the
> problem comes from the client part.
> And I use windows XP on both side of the system.
>
> thanks again for your help.
>
> --
> Simon MAZUE
>
>
>
>
>
> Daniel PEACOCK wrote:
> >
> >
> >
> >
> >
> > Hi Simon,
> >
> > It would be useful to know at what stage things have gone wrong ...
> during
> > capture, during transmission across the network to the 2nd PC, or during
> > playback.   This can be determined by writing a wave file to disc at the
> > different stages - e.g write a wavefile to disc based on what you
> receive
> > from the capture buffer on the first PC, and write another wavefile on
> the
> > 2nd PC based on the audio data it receives.
> >
> > Rather than using 2 big buffers of 88200 you would probably be better
> off
> > using more buffers of smaller sizes, e.g use 10 buffers of 17640 bytes.
> >
> > Also which OS are you using?
> >
> > Dan
> > Creative Labs, Inc.
> >
> > Notice
> > The information in this message is confidential and may be legally
> > privileged.  It is intended solely for the addressee.  Access to this
> > message by anyone else is unauthorized.  If you are not the intended
> > recipient,  any disclosure,  copying or distribution of the message,  or
> > any action taken by you in reliance on it,  is prohibited and may be
> > unlawful.  If you have received this message in error,  please delete it
> > and contact the sender immediately.  Thank you.
> >
> >
> >
> >
> >
>
> >              Jason Daly
>
> >              <jdaly at ist.ucf.ed
>
> >              u>
> To
> >              Sent by:                  Simon MAZUE <smazue at gmail.com>
>
> >              openal-bounces at op
>  cc
> >              ensource.creative         openal at opensource.creative.com
>
> >              .com
>  Subject
> >                                        Re: [Openal] repeated "buzz"
> while
> >                                        streaming with openAL
>
> >              09/14/2007 07:37
>
> >              AM
>
> >
>
> >
>
> >
>
> >
>
> >
> >
> >
> >
> > Simon MAZUE wrote:
> >> Hello,
> >>
> >> I am trying to stream the sound from a PC to another PC using OpenAL. I
> >> capture it and send it in PCM (44100 Hz) but what I obtain on my other
> PC
> > is
> >> the same sound cut by "buzz" every time the buffer changes (2 buffer of
> >> 88200 bytes).
> >>
> >> I have tried many changes but with no success. However, it seems to be
> my
> >> "client" application which causes the problem. Is there someone who has
> > any
> >> clue of where this comes from and how to stop it ?
> >>
> >
> > Not that this is a solution, but what happens if you capture and send at
> > 48000 hz?
> >
> > --"J"
> >
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