Hi Jell,

The audio echo cancellation feature is a core functionality of the Flash Player and AIR runtimes.  Though the LCCS team has stressed the importance of this feature to the Adobe runtime teams, it's always better when they hear it directly from impacted developers and customers.  I encourage you to voice your concerns and vote for this feature here...

   http://bugs.adobe.com/jira/browse/FP-273

Thanks,

Fang

Dear Adobe Employees,

Since it looks like this issue is still open, please allow me to suggest a simple solution that you can easily & quickly implemet.

All you need to do is simply to supply API to access the audio (i.e. read frames of audio signal and write them back). We will do the rest from there.

We will simply use a commercial SDK to do server side AEC. SoliCall is one SDK that I am familiar with but I am sure there are others as well.

Sounds like a plan ?

Best Regards,

Valer

Hi~ bernard-qc

I've tried your app, and I didn't hear any echo.

I think it would be a nice solution for this time.

Could you please tell me how did you do it?

How do you mute the speaker?

i tried the code like this:

//

var newSoundTransform:SoundTransform=new SoundTransform();

newSoundTransform.volume=0;

this.soundTransform=newSoundTransform;

//

but it's not work.

Bernard-qc,

I also am getting terrible echo and it`s almost to the point where it renders the app. useless for users!  I have tried setting useEchoSuppression="true", but it appears to have only a negligible effect!

The LCCS team has done an awesome job, and the service is great, but I`m afraid that there needs to be some improvement in the audio department.  With apps. like Skype setting the precedent for p2p video chat, users/customers will simply not tolerate being required to wear a headset any more!

Thank you for this!  I will give it a try!

Matt

Hi Raff,

Two things remain to be corrected from here the arrival of the player 10.3: Echo cancellation and the loss of the audio signal coming sometimes from a participant in particular. It is often necessary to refresh the audio communication (stop/start audiopub or audioSub.resetAllStreams). Also, it arrives as sometimes as certain systems and navigator freezes when there are several participants at the same time. However, the reader 10.2 seems to have corrected this problem partly. All the remainder is A1!

Bernard

Judging from Rob Christensen's comment on Jul 7, 2009, Echo Cancellation has been worked on for the last year and a half... still nothing?

Great! I hope that also includes any "issues" that may still exist when

multiple participants are talking at the same time (per Bernard's post #28).

Please keep us appraised of progress. I look forward to sipping this "wine"

when its ready to drink ...

Thanks for taking the time to keep us informed.

Michael

Hi Fang.

My Developer is telling me that Flash 10.3 has "low volume of audio", and that interruption of audio coccurs. Have you had these reports?

Have others (on this forum) tested it to determine whether this occurs generally?

Has it been tested on various browser engines?

We'd really like to get to the stage where we can use this software in the knowledge that there are "no surprises".

If we can't I'd appreciate a pointer from anyone to an alternative product, as we are being delayed in bringing our project to the market.

Thanks

Michael

Thanks Arun. I have sent your requests to my Developer and am awaiting their

response. As soon as I receive it I will advise you. They did say they were

going to be carrying out further tests over the next day or 2.

We appreciate the speedy response form you guys ...

Cheers.

Michael

Error in my posting above (and systemn will not let me Edit it)

1) should read as follows:

1) Flash Player 10.3 release candidate which latest version 10.3.181.5: NOT WORKING. No sound at the recipient end at all.

Apologies,

Michael

Hi Arun.

As I have limited knowledge and am therefore unable to do what you have

requested, I have forwarded this to my Developer with the request that he do

the necessary. I hope that he will get onto it really quickly. If he doesn't

I will revert to you. perhaps its better if I am able to email your Private

Mail?

I am most anxious to resolve this problem (as I'm sure you are), and I

really appreciate your speedy responses. It reflects well on the entire

customer-service culture of Adobe. Good job!

Thanks, Michael

mihai, raff, thanks for the responses. have you had a chance to test?

hey arun, thanks for the reply.  i hadn't tried the echo supression flag because i thought it was an old option from the previous flash player.  i don't have access to an XP machine at the moment but will try and let you know.

i tried the SWF you guys published because i was having trouble with my own application and AEC not working.  it seems i did have it working at one point, and then after a few changes, echo had returned.

i think i may have a configuration problem.  can you tell me exactly what i should be doing to enable AEC in my app?  there are a few threads in this forum regarding that, but some are outdated and i want to confirm the steps.

i'm building using Flash Builder Burrito (still the preview, haven't installed the first release)

- use the LCCS SWC configured for AEC that is linked in this forum

- compile using flex 4.1 sdk

- target 10.3.0 player

- additional compiler option of -target-player=12

- 10.3 playerglobal.swc in [flex sdk 4.1 root]/frameworks/lib/player/12.0

do i need to call Microphone.getEnhancedMicrophone() and useEchoSupression(true) ? i have not been doing that - i assume that the LCCS swc has already been configured to do so?

thanks

adam

We also have a problem. Our code is:

---

this.mic = Microphone.getEnhancedMicrophone(miccb.selectedIndex);
var options : MicrophoneEnhancedOptions = new MicrophoneEnhancedOptions();
options.mode = MicrophoneEnhancedMode.FULL_DUPLEX;
options.autoGain = false;
options.echoPath = 128;
options.nonLinearProcessing = true;
this.mic.enhancedOptions = options;
               
this.mic.addEventListener(SampleDataEvent.SAMPLE_DATA, micSampleDataHandler);
this.mic.setUseEchoSuppression(true);
this.mic.setLoopBack(false);
this.mic.gain = 90;
this.ns.attachAudio(this.mic);

---

Mainly problem is because recipient do not receive any audio at all. Looks like microphone is not getting initialized in some version of Flash Player. We have tried 4 different version of Flash Player:

1) 10.3beta - works fine, at least we can hear audio on the recepient end!

2) 10.3 RC1 - NOT working, we can't hear sound on the recipient end. also tried few other example we were able to find in the Internet with AEC

3) 10.3 Release (10.3.181.14) - NOT working, same as RC1

4) 11 Incubator - works fine (tested in firefox 4.0.1, Google Chrome 11.0.696.68)

We made tests on several computer driven on Windows 7, Windows XP, Ubuntu 11. Test was made with FMS 3.5 and 3.1 server.

To analyze the problem we have added a trace function:

---

private function micSampleDataHandler(event:SampleDataEvent):void{
  trace("micSampleDataHandler: " + event.data.bytesAvailable);
}

---

and result of trace is:

1) without AEC, initialization of microphone is this.mic = Microphone.getMicrophone();

---

---

etc.... so it WORKS if we do not initialize AEC

2) with AEC initialized: this.mic = Microphone.getEnhancedMicrophone();

---

netStatusStreamHandler NetStream.Publish.Start

---

and NO data from Microphone.

Should I post it as Bug somewhere? if yes, let me know where.

Thanks Arun,

actually I saw this Flash application, but actually I am not sure how I should understand if it works for me?

basically I can move Gain, I can click on Enter... thats all. I don't see any dynamic changes like I think there should be Mic volume bar running/changing? I also don't hear anything.  Probably this application is not working for me as well.

I am using Chrome browser and  here is my screenshot:

Menu is Russian but Flash Player version is in English and its 10.3.181.14. Same version says if I go to http://www.adobe.com/software/flash/about/

Hope that helps!

Thank you and have a nice weekend!