[andraudio] Input gain (again)

Andrei Comandatu andrei.comandatu at gmail.com
Fri Aug 31 09:52:34 EDT 2012


I do not think so...

As far i understood webrtc is used by google for voip audio processing
(echo cancellation, gain control, voice detection,..)
I do not think that it can decode ogg, last time i checked, but it has some
audio decoders...

Andrei.

2012/8/31 Swapnil adsure <swapniladsure at gmail.com>

> Can webrtc help me to decode ogg live streaming on android?
> i was trying to compile ffmpeg on android on MAC OS X but it show c
> compiler not found error
> anybody help me for that
>
>
> On Fri, Aug 31, 2012 at 9:24 AM, Andrei Comandatu <
> andrei.comandatu at gmail.com> wrote:
>
>> Hi,
>>
>> Can you take a look at webrtc?
>>
>> Andrei.
>>
>>
>> 2012/8/30 mic _ <micol972 at gmail.com>
>>
>>> *pretty much _stuck_ with
>>>
>>>
>>> On Thu, Aug 30, 2012 at 11:35 AM, mic _ <micol972 at gmail.com> wrote:
>>>
>>>> On more recent Android devices, the analog baseband chip settings (like
>>>> microphone gain) is typically exposed as one or more ALSA control(s). But
>>>> the names of these controls can differ between different platforms, and
>>>> even if you knew the name of the control in question I'm not sure that
>>>> you'd have permission to write to them without being root.
>>>>
>>>> In other words: you're pretty much stuff with software/digital input
>>>> gain. In Jellybean Google has added the concept of pre-processing effects
>>>> that can be applied to recordings, and one of the available effects is an
>>>> Automatic Gain Control, which could at least save you the effort of having
>>>> to implement one yourself (with the obvious downside of being limited to
>>>> API level 16 and later).
>>>>
>>>> /Michael
>>>>
>>>>
>>>> On Thu, Aug 30, 2012 at 11:11 AM, Davy Wentzler <
>>>> info at audio-evolution.com> wrote:
>>>>
>>>>> Hi there,
>>>>>
>>>>> This probably has been discussed before, but perhaps there is new
>>>>> information meanwhile.
>>>>>
>>>>> I get regular requests for adding adjustment of input gain to my app
>>>>> 'Audio Evolution Mobile'. I usually respond that to the best of my
>>>>> knowledge there is no such control in Android available (Java and native
>>>>> C), but I usually get the response that app 'xyz' has it (and they say it
>>>>> works too).
>>>>>
>>>>> So, today I tested some apps like RecForge which people say has
>>>>> working input gain control with my Sony Tablet S (Android 3.2), and
>>>>> although the wave form is showing half volume, there is definately immense
>>>>> clipping/saturation going on. So I think it's between the ears, or isn't it?
>>>>>
>>>>> So, I'd like to hear if any of you found out a way to control input
>>>>> gain (on non-rooted devices!). I don't want to add 'software' input gain
>>>>> after the ADC process, just to let people think it's there.
>>>>>
>>>>> Kind regards,
>>>>>
>>>>> Davy
>>>>> eXtream Software Development
>>>>> --
>>>>> andraudio -- A discussion list for Android audio developers
>>>>> For information about subscribing and unsubscribing, go to:
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>>>>>
>>>>
>>>>
>>>
>>> --
>>> andraudio -- A discussion list for Android audio developers
>>> For information about subscribing and unsubscribing, go to:
>>> http://music.columbia.edu/mailman/listinfo/andraudio
>>>
>>
>>
>> --
>> andraudio -- A discussion list for Android audio developers
>> For information about subscribing and unsubscribing, go to:
>> http://music.columbia.edu/mailman/listinfo/andraudio
>>
>
>
> --
> andraudio -- A discussion list for Android audio developers
> For information about subscribing and unsubscribing, go to:
> http://music.columbia.edu/mailman/listinfo/andraudio
>
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