There appears to be a mic at the top of the phone and a mic at the bottom of the phone, I assume to record in stereo. For voice calls on speakerphone, which mic is active? I'm trying to figure out which is the best way to hold the phone when it's noisy and I want to speak directly into the mic.
And for other functions like google assistant, should I be speaking into the top or bottom mic?
enozten said:
There appears to be a mic at the top of the phone and a mic at the bottom of the phone, I assume to record in stereo. For voice calls on speakerphone, which mic is active? I'm trying to figure out which is the best way to hold the phone when it's noisy and I want to speak directly into the mic.
And for other functions like google assistant, should I be speaking into the top or bottom mic?
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I don't think so. The top one is the noise cancellation mic
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Has anyone had issues using the TF to video call and the mic not being loud enough? I use Google Talk and while I can hear the other side ok, they usually have a problem hearing me. I can't find any settings in Google Talk for the mic volume. I end up trying to shout in the direction of the mic (which I think is located on the right side next to the audio jack). I also use the SE MW600 bluetooth headset with the TF a lot and Google Talk doesn't seem to output to headsets. That would solve the low volume issue as well. Any insights or confirmation would be appreciated.
The mic on my wife's transformer is defective, but my transformer is fine. We are going to have to send hers back. Try google voice search, if it has a hard time hearing you when talking normally, then you may have a hardware problem too.
Looks like I have the same issue. I tried using google talk today with no luck. SO I tested the mic with both the sound recorder and the voice search. The volume indicated with those shows a problem.
Its very directional. If I angle it so my mouth has some line of sight to it then its fine but facing head on I have to speak up. I wonder if a small plug in mic angled to the front would help.
I am surprised that the BT headset did not work. I use one all the time on my laptop with Skype.
I was wondering if anyone knows how to raise the mic volume on a call. I use a car arm to use my phone to listen to music and answer calls while I'm driving. I've noticed that the mic volume is very low while the headphone jack is use (can't hardy hear me). Of I turn on the speaker feature on the call, the mic volume fixes itself. I was wondering is there was a way to raise the mic volume with the headphone jack in use .
Thanks in advance.
Bump!
Sent from my Nexus 4 using xda app-developers app
If you search for mic call on N4 threads you will see lots of complains and no answer. Seems like noise cancelation is the problem but still no luck
Stick your finger over the top microphone while you're talking. That will make the N4 send all the signal from the bottom microphone, effectively eliminating noise suppression but letting your voice come through okay.
wmm said:
Stick your finger over the top microphone while you're talking. That will make the N4 send all the signal from the bottom microphone, effectively eliminating noise suppression but letting your voice come through okay.
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did it with no success, in fact that should be the solution for some reason it doesnt work for me
Dunno, then; I was just reporting the experience of a user in a different thread. I haven't had a phone call in the car since then, so I don't know whether it would work for me or not.
Just a thought -- my car mount has movable feet, and I have to make sure that one of them doesn't cover the microphone hole on the bottom. I don't know if your mount potentially has the same problem or not.
Does anyone else have the problem where the other person can't hear you when you use a pair of headphones while in a call? When removed, they can hear me fine. I'm hoping that this is a software issue that can be resolved in an update. If not, then i want to return it before my remorse period is over.
I am having distorted sound - other party hearing it unclear and distorted..
looks like a hardware issue.. tried with 2 earpiece... no luck.
I'm actually starting to wonder about that. It may actually be a software/driver issue. I was on the phone yesterday and decided to do some testing. Unplugging them and plugging them back in provides perfect audio to the other person for a few seconds before going back to garbage, as does muting and then un-muting the microphone when in a call. Something I've noticed about the microphone is that the gain seems to be set too high - try to make a recording of cars going by - guaranteed clipping (don't have the volume too loud or you could blow out the speaker you're listening to it on).
rr5678 said:
Does anyone else have the problem where the other person can't hear you when you use a pair of headphones while in a call? When removed, they can hear me fine. I'm hoping that this is a software issue that can be resolved in an update. If not, then i want to return it before my remorse period is over.
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I ran into the same issue. However, the headphones I was using didn't have a built in microphone. I discovered that if I plug in headphones that lacked a built-in mic, the phone switches its internal microphone's gain to the gain it would use if you were holding the headset to your ear. I held the microphone in close proximity to my mouth and that solved the issue.
I guess this would be a software issue.
KlipperKyle said:
I ran into the same issue. However, the headphones I was using didn't have a built in microphone. I discovered that if I plug in headphones that lacked a built-in mic, the phone switches its internal microphone's gain to the gain it would use if you were holding the headset to your ear. I held the microphone in close proximity to my mouth and that solved the issue.
I guess this would be a software issue.
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That's exactly the testing I did and exactly what I was thinking. Now to wait for LG or Google to fix it.
Another experiment you might try would be to put your finger over the secondary microphone on top of the phone and see if that makes a difference. (My guess is that the reason your voice comes through softly with the headphone plugged in is that the phone is still doing background noise suppression, which works by taking the difference between the main microphone, which picks up your voice plus ambient noise, and the secondary microphone, which mostly picks up just the ambient noise. When your mouth is far away from the phone, your voice is equally loud in both microphones, so the difference doesn't yield much voice signal. If your voice comes through louder after stopping up the secondary microphone, that would confirm this explanation for the problem.)
wmm said:
Another experiment you might try would be to put your finger over the secondary microphone on top of the phone and see if that makes a difference. (My guess is that the reason your voice comes through softly with the headphone plugged in is that the phone is still doing background noise suppression, which works by taking the difference between the main microphone, which picks up your voice plus ambient noise, and the secondary microphone, which mostly picks up just the ambient noise. When your mouth is far away from the phone, your voice is equally loud in both microphones, so the difference doesn't yield much voice signal. If your voice comes through louder after stopping up the secondary microphone, that would confirm this explanation for the problem.)
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Next time I'm in a long phone call where I am using headphones, I'm going to try that. It could be possible.
wmm said:
Another experiment you might try would be to put your finger over the secondary microphone on top of the phone and see if that makes a difference. (My guess is that the reason your voice comes through softly with the headphone plugged in is that the phone is still doing background noise suppression, which works by taking the difference between the main microphone, which picks up your voice plus ambient noise, and the secondary microphone, which mostly picks up just the ambient noise. When your mouth is far away from the phone, your voice is equally loud in both microphones, so the difference doesn't yield much voice signal. If your voice comes through louder after stopping up the secondary microphone, that would confirm this explanation for the problem.)
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This appears to be what is happening. The top mic is doing noise cancelation for the bottom mic.
I called a friend and plugged in headphones. When I didn't cover either mic, she said I was quiet (because the phone thought I was background noise). When I covered the top mic, she could hear me fine.
At this point, I'm inclined to say this is a software issue because the phone app can switch between microphones and which one is used for background noise cancelation. (Putting the device in speaker mode appears to use the top mic only.)
Sent from my Nexus 10
That's good confirmation -- thanks for running the experiment. Maybe I'll put a little wad of putty in the car to stick over the top microphone while I'm driving!
Been noticing that I say ok Google at the top of the phone and nothing happens then say it at the bottom and it works. Tested with the phone in safe mode and it still happened. If i block the bottom microphone it can't pick up anything. Anyone else can test this to see if they have the same issue or if it's just me that got a defective device.
Thanks in advance
I think the top microphone is for noise cancelation. So I think it's normal.
Sent from my SM-G935F using Tapatalk
It was my understanding that they both pick up sound and noise cancel between them. That's the way it's been on other phones I have had.
Tried mine, and it is the same as yours.
I also tested it by using the voice recorder app, speaking into the top microphone while covering the bottom mic and then playing back to see if it is picking up sound. The playback was very quite. However it works normal when using the bottom mic.
Additional info, the phone user guide indicates that the voice recorder app has two modes of operation - standard and interview. In interview mode both top and bottom mics are in operation. I put the voice recorder app into interview mode and run the same test ( covering the bottom mic and speaking into the top mic) , this time the playback was loud and clear.
So it might be that in normal operation the top mic operates in noise cancellation mode as suggested above.
The bottom mic is designed to take your voice input. The top mic is designed to hear ambient noise, and subtract that information from the signal the bottom mic sends to the phone, reducing the amount of noise on your call or recording. That's the way all my phones with a noise cancelling mic work.
It works with the voice recorder
iofractal said:
Been noticing that I say ok Google at the top of the phone and nothing happens then say it at the bottom and it works. Tested with the phone in safe mode and it still happened. If i block the bottom microphone it can't pick up anything. Anyone else can test this to see if they have the same issue or if it's just me that got a defective device.
Thanks in advance
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Hello, the top mic works with voice recorder when you choose the "interview" mode from the 3 options on top.
I know for sure that both mic works on mine. I don't know whether some apps will use the top mic only for noise cancelation, as others have mentioned.
I used an app called "Easy Voice Recorder Pro" and enabled Stereo recording in the settings in this app. The top mic works as left, and the bottom one works as right. You can try gently rubbing your fingers over the mic area to see if it picks up the sound and play it back wearing a headphone.
As others are saying.
The top moc is use for phone calls.
You can use the top mic for interview mode.
This is all normal
I'm trying to remap my microphones because whichever microphone is used for voice commands, voice recording, and non-speakerphone calls doesn't work, so I'd like to instead be using the microphone that's used for video recording and speakerphone calls as that one does work. I'm gandering at mixer_paths.xml and I see four microphones, main-mic, sub-mic, 3rd-mic, and ear-mic. Which is which? Guessing ear-mic is the bottom hole one that doesn't work. I switched the ear-mic devices for main-mic and it didn't change anything.
Also, is there a better way to go about switching them for the system?
Should anyone else be in my situation, in mixer_paths.xml
main-mic is the bottom microphone. (DMIC2 &DEC2)
sub-mic is the top microphone. (DMIC4 & DEC4)
ear-mic is the physically plugged in headset microphone. (DEC5 & ADC2)
If you replace DMIC2 with DMIC4, and DEC2 with DEC4, your top microphone will work in place of your bottom one.
If anyone knows what 3rd-mic (DMIC6 & DEC6) is, I'd love to know. When I try to use it I don't get any audio input.