[Freeswitch-users] Portaudio Improvements

[Tamas Jalsovszky]

Wow, I didn't even know that somebody is working on PA2.
Paulo, could you share some more information about that module? Why would
somebody use it instead of the current one? Advantages/disadvantages?
Is the source code available somewhere? Do you have a roadmap for the
module? :)

Regards,
  Tamas

On Fri, Jan 28, 2011 at 12:51 PM, Paulo Vicentini <vizentini at hotmail.com>wrote:

>  Hi
> You can try PortMixer for volume control that is intended to work along
> with PortAudio
>
> I am developing/testing "mod_portaudio2" that does not rely on pablio,
> maybe things will be better with this approach
>
> Paulo
>
> ------------------------------
> From: mitch.capper at gmail.com
> Date: Sat, 22 Jan 2011 21:05:22 -0800
> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] Portaudio Improvements
>
>
> Ah well viewing volume levels had not been something I had looked into.  It
> wouldn't be too hard but the question is how do you constantly report that
> (FS event every second? every half second? port audio commands to return
> that value frequently?).  If your client is windows however again the native
> windows volume handler for apps does also keep track of their current
> output.
>
> ~Mitch
>
> On Sat, Jan 22, 2011 at 5:26 PM, Seven Du <dujinfang at gmail.com> wrote:
>
> Thanks Mitch, I actually had tried the equivalent uuid_audio and looks
> like it's the only way to do it for now. We had wanted to get energy
> levels dynamically to show a live indication but we given up that
> feature.
>
>
> On Sun, Jan 23, 2011 at 2:52 AM, Mitch Capper <mitch.capper at gmail.com>
> wrote:
> > It is true PA lacks volume control, it had been something I was debating.
> > Adding gain is pretty simple as you are for the most part just
> multiplying
> > up the samples I believe so would not be a major item to add to
> portaudio, I
> > however decided not to go this route for two reasons.  1) In Windows each
> > application has its own volume setting (Vista and higher),  and apps are
> > starting to tie into this than internal volume controls.  The downside is
> it
> > doesn't distort audio/have a gain option.   This is when I thought about
> > allowing for a fixed gain amount added to portaudio.  2) Freeswitch
> actually
> > has its own built in volume control settings with set_audio_level.
> > set_audio_level allows for 9 settings (4 lower 4 higher) and seems to do
> a
> > good job at digital volume control.
> > Avoiding modifying the audio stream itself could also result in less
> > distortion when using actual volume controls (headsets, etc).
> >
> > So if you want volume control I would say take a look at set_audio_level
> as
> > it may be the simplest method.   Adding it to portaudio would work but
> one
> > of the nice advantages of set_audio_level is the fact you can also do it
> per
> > channel rather than globally:)
> >
> > ~Mitch
> >
> > On Fri, Jan 21, 2011 at 5:44 PM, Seven Du <dujinfang at gmail.com> wrote:
> >>
> >> In addition to AEC. I also found PA lacks the ability to change the
> >> sound device volume. I tried to control sound devices in QT but
> >> haven't find a way. Ideas on this?
> >
> >
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>
>
> --
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