Android :: Can We Get Raw Audio Off Microphone Using Droid
Nov 23, 2009
I've read a lot of posts in this group regarding raw audio processing. Most of them include references by Mr. Sparks about support for this in "future releases". I hope maybe he was referring to Android 2.0? To be clear, all I want to do is obtain audio data from the microphone in as high a fidelity as possible to perform DSP against it. This is blissfully outside the realm of any DRM-laden audio output issues (I hope).
So, in short, can we get raw audio off the microphone using Android 2.0 and a Droid, for example?
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Oct 20, 2010
Is there anyway in android to loop a recorded audio through microphone. I mean that instead of speaking in microphone, i should be able to send a recorded audio from code into it.
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Oct 13, 2010
How can I get the volume of the audio stream coming in through the android microphone?
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Sep 28, 2010
How do i get access to the audio recorded by the microphone before it is accessed by the other applications.
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Jan 17, 2010
I have searched the whole group but wasn't able to find a answer for my problem.I want to record audio from the microphone, apply some audio signal processing and than save the processed audio data in a compressed format.I figured out, how to record audio uncompressed but now I wonder if I can use some api functions to store this data in a supported compressed format.
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Apr 22, 2009
we're a group of students and trying to implement some kind of voice cryptography over a gsm connection (without modifing any gsm related codecs, we render pure audio which gets transmitted via gsm). Is it possible to initiate a voice call and transmit our generated audio signal (means bypassing the microphone as the primary audio source for that call)? I write this because I'm slightly worried after reading some posts on this list/group which states that the android.telphony APIs are private and can't be called from processes outside the the telephone subsystem.
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Jun 19, 2010
1st. Are our phones (HTC Incredible) capable of digitally recording audio from a mic? For example, can I plug a microphone into the 3.5mm jack and start recording the audio. (given the hardware is capable) Which leads me to my next question, if so, is there an app for it? I searched and searched but couldn't find much info on it...
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Sep 29, 2009
Is possible to inject audio such as mp3 in the output of microphone streaming? I've found an application : spoofApp that change the voice during a call. How is possible?
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Mar 8, 2010
Is it only possible for one object to access the microphone at a time? That is, could I simultaneously use an AudioRecord to do some audio processing and use a MediaRecorder to record the incoming audio?
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Oct 11, 2010
I am trying to understand how to go about determining the frequency of various sounds captured on the phone via microphone. I am attempting to display a graph plotting the frequency of the note.
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Aug 11, 2009
I've implemented "Audio Capture Setup and Start" example (http:// developer.android.com/guide/topics/media/index.html) with small modification - the output format is MPEG_4 not THREE_GPP.
The result - records with extremely poor audio quality.
Could you help me to understand where is error and how is possible to do really good audio records with Android?
I've done an experiment with Camcorder - standard Android application. Sound quality of the video is same poor. The audio signal is extremely low (quite).
Is it "by design" or may be some hardware problem (T-Mobile G1)?
I've found description similar problem here - http://osdir.com/ml/AndroidDevelopers/2009-06/msg00752.html - "Microphone audio capture with emulator is of very poor quality". In my case this problem reproduces on the real device. Unfortunately I have not found answer. I read about some "custom" encoders.. but have not found any example how implement them.
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Jun 2, 2009
As a first step toward a speech recognition project, we wrote a simple voice recording application based on the information in this thread: http://groups.google.com/group/android-developers/browse_thread/threa...
It is working; however, the audio is extremely poor -- too staticy for our needs code...
As a comparison, here is a similar audio file captured with audacity on a PC: http://juzzam.org:9090/myAudioFile_onPC.mp3
Has anyone been able to record high quality audio with the emulator? If not, is it any better on the android dev phone?
According to the documentation of MediaRecorder, there is only one audio encoder "AMR (Narrowband) audio codec" and three output formats--3gpp, mpeg, and raw AMR: http://developer.android.com/reference/android/media/MediaRecorder.html
Here is the Activity source: http://juzzam.org:9090/RecordMicrophone.java.txt
We are testing on Windows XP, with a Logitec USB microphone, eclipse ganymede, and we are using all the defaults for an android 1.5 app (no emulator command-line options.. we defined the sdcard in the avd manager).
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Jan 25, 2013
I have a Galaxy Note 2 and can't figure out how to record via my bluetooth headset not via the phone mic. Tried 20+ apps that record great via the phone mic but not via my headset.
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Nov 24, 2010
I have been searching for quite some time now, and I haven't been able to find a way to actually get an SPL/db value from a microphone on android. The few threads and articles that I have found that discussed it treated it like something SO obvious that anyone should be able to do it, and were more concerned with getting their conversion algorithms correct. Does anyone know how to do this?
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Jun 15, 2010
I'm working on an app that uses AudioRecord class to get input data from the phone mic. For some reason I'm unable to mute the mic. I have tried with different AudioSources (DEFAULT, MIC and VOICE_UPLINK) when creating the AudioRecord object, but there's no difference in the muting behaviour.
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Jul 26, 2010
Does anybody know of a way to turn your Droid into a microphone via USB? For instance, let's say I want to talk to somebody on Skype from my computer, can I use my Droid as a microphone for them to hear?
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May 5, 2010
I connected my phone via USB to my RR sport to upload audio files to the RR hard drive. However, I keep getting connection error. Apparently my device is not being recognized as a storage. I did the unmount thinking. Also, I am wondering how I can play audio from my phone through the RR audio system.
RR is 2010.
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Aug 1, 2010
Does anyone know where I can find a replacement microphone for my girlfriends Droid eris? I've been looking around but haven't found anything. Wasn't sure if anyone here knew of a place I could get one.
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Dec 9, 2009
just started using the Pandora music app, but my kids in the back seat could not hear it. so I stopped by Walgreens and picked up the "JUPITOR JACK". you can't miss it cause it has the big red ad: "AS SEEN ON TV". it works well enough, but I had to tweak my car audio system to make it decent. whatever the droid plays comes out on the car radio, it's better then my old belkin FM transmitter.
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Mar 13, 2010
I have a friend with a moto droid using handcent and he is able to speak a voice quick reply into handcent and it types it out...(handy while driving). I installed handcent on my eris today and do not have the microphone icon available on the quick reply screen. Any ideas how I can get it to work? Is this available on the eris?
Thanks
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Jul 15, 2010
I'm having trouble with my microphones and was wondering if anyone else had the same issues? Pretty much no one can hear me if I call them, If I set it to speaker they can hear me fine (via top mic) but when I try to talk normally, still the same muted mic. I cant find any settings for this and I have tried rebooting the device. Anyone know what may be causing this or maybe I got a defective X?
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May 23, 2010
Does anyone know if there is a way for either meridian or the regular android player to recognize audio tags on lossless audio files?
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Sep 22, 2010
Is there an Android equivalent to the iOS Core Audio / Audio File Stream Services? I need to be able to read audio bytes from a network and feed them to the audio system under my control, so I can do my own timeouts / reconnects / range requests / etc. without interrupting the audio playback (since the system audio thread would be playing audio already enqueued). It seems that MediaPlayer doesn't give me this level of control. Is there a lower-level framework that does, either in the SDK or NDK?
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Oct 2, 2010
I want combine two audio files. (A audio file + B audio file = AB audio file)So, my search result is:
1. useing an AudioTrack.
2. decode PCM from audio file.
3. combine PCM.
This is currect? It there another way?
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Oct 17, 2010
I want to record a sample from the microphone, then I want to play the recorded file maximizing the volume and apply some audio effect, like modifing sample rate or addind an echo.Waht is the best way? is there an example?
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Jun 2, 2009
Could you please let me know how to do the audio record in android emulator and play the same recorded audio. Could you please help me in proceeding in development.I tried with MediaPlayer API's also.Its not working.
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May 8, 2010
Is there a way to determine the audio format of an audio file in Android? On normal java I do it like this:
File file= new File(...);
AudioInputStream stream = AudioSystem.getAudioInputStream(file);
AudioFormat format= stream.getFormat();
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Aug 20, 2010
Keyboard related question. I got shape writer because i couldn't get swype and i like it a lot but i still want the microphone, does swype have the microphone on it for speech to text? if i can get one of these swype type keyboards with the Mic I'd be sold
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Dec 23, 2009
My audio analysis application needs a microphone sample rate of greater than 8000 Hz.At least 11025 Hz is required.It seems that some phones support a higher rate and some are limited to 8000 Hz.Does anyone know what percentage of Android phones will support the higher sample rate?And if I do develop this app, how can a potential customer determine whether or not his particular phone supports the higher sampling rate?
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Aug 10, 2010
A small program that I wrote cannot record the microphone. One api call, getminbuffersize keeps returning -2 which is not correct. The program works on a real android one. I use 11025Hz, 16bit pcm,mono recording.
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