Android :: AudioRecord On Samsung Moment
Sep 25, 2010
We have been getting reports of audio recording not working on Samsung Moment phones on 2.1-update1.
int bufferSize = AudioRecord.getMinBufferSize(sampleRate, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT); this.audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
generates these logs: I/AudioPolicyManager( 1889): getInput() inputSource 1, samplingRate 16000, format 1, channels 10, acoustics 0 W/AudioHardwareALSA( 1889): openInputStream : mInput already exists!! E/AudioRecord( 2618): Could not get audio input for record source 1 E/AudioRecord-JNI( 2618): Error creating AudioRecord instance: initialization check failed. E/AudioRecord-Java( 2618): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object. I can't find the "mInput already exists". anywhere in the source base, could this perhaps be an error message included by the OEM?
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Feb 9, 2010
Here I am with 2 HTC Hero phones, with only one on an active account. I would love to try out the Samsung Moment, but don't have the $$ to just go out and buy one.My hero comes with all it had when new, plus I have an extra battery for it I will add to the deal. This hero has only been used for about a week, and while using it, it "lived" in my Blackberry Tour holster to give it maximum protection. There are no scratches or rub marks on it, never been dropped and I have reset it to Factory Specs via the SECURITY MENU and the ESN is clear and ready to be activated on your SPRINT account.Please email me at sy@rayzel.com if you are interested. Maybe we can work out a swap.Now for the additional 1 to 2 feet of snow that is forecast for this afternoon and tomorrow, on top of the 2.5 feet still on the ground.
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May 15, 2009
I'm trying to figure out how to use the AudioRecord class.I created a callback with a logging message, but don't ever see it called.Do you see anything wrong with what I'm doing? Do you have an example of how to use the API?
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Apr 30, 2009
I want to use AudioRecord and AudioTrack classes(in SDK 1.5) in my program. Where can I find how to use it. Is there any API demo program for this?. If not it is greatly appreciated if someone can post a sample code in this forum.
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Aug 27, 2010
Recently on Sprint's Moment forum a member by the name Mkeng5 has been posting pretty vocal complaints about the Samsung Moment. Not only does he claim the Moment is defective, but he goes a step further and even cites Samsung's own Warranty Policy.
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Oct 21, 2009
I currently own a Palm Pre and I'm ready to ditch it for an Android device. Don't get me wrong, webOS is clean and has a lot of potential, but for now...lacking would be a good (albeit understated) word to describe it. I want to jump the Pre ship for the Samsung Moment, but one thing I keep reading about the Moment is bothering me - everyone says it doesn't have multi-touch. However, I recently read that multi-touch is something Android doesn't yet support. This knowledge was previously unbeknownst to me since I haven't used an Android device since the G1 first launched. Since the Moment uses a standard Android build, the OS wouldn't allow multi-touch even if the phone were capable of it. So my question is: Does anyone know whether or not the Moment is capable of multi-touch? If it's simple a shortcoming of Android, I can deal with it since I know Android 2.0 should finally support it.
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Jan 21, 2010
My application uses AudioTrack in streaming mode and AudioRecord simultaneously.My problem is that I start them at the same time, but I have no guarantee that they will actually start playback ecording in the same timestamp. The reason I need this kind of accuracy is because I use echo cancellation (subtracting audio played to speaker from the recording).My echo canceller doesn't require an exact delay, but the delay introduced between AudioTrack and AudioRecord moves in the range of 250ms (between different runs), and that's too much - each run is different because they start themselves asynchronously. The API doesn't provide me a way to make sure they start in the same time, so I thought about measuring this starting delay somehow and then using it in my calculation.Does anyone have an idea how to do that, utilizing their API or in any other way?
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Mar 10, 2010
I currently have a Loop back program for testing Audio on Android devices.It uses AudioRecord and AudioTrack to record PCM audio from the Mic and play PCM audio out the earpiece. So as you can see in the creation of the AudioTrack and AudioRecord the Encoding is supplied via the AudioFormat but this only allows 16 bit or 8 bit PCM.I have my own G711 Codec implementation now and I want to be able to encode the audio from the Mic and decode it going into the EarPiece, So I have encode(short lin[], int offset, byte enc[], int frames) and decode(byte enc[], short lin[], int frames) methods but I'm unsure as to how to use them to encode and the decode the audio from the AudioRecord and AudioTrack.
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Nov 11, 2010
I used AudioRecord on emulator and phone. I found that AudioRecord is not working on phone: 1> the min-buffer-size on simulator is much smaller than phone 2> The audio data I read from phone is all zero.
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Mar 25, 2010
I'm doing a voice recording using AudioRecord class and the main requirement that the frequency must be 16000 Hz. I'm using only emulator in development process for now and met the problem that I can't set frequency more than 8000, otherwise I get bufferSize -2, and can't create instance of AudioRecord with such buffer. Thank you to Szabolcs Vrbos, he told me that this problem is only with emulator and several Samsung phones, device can record with higher frequency.I need a word from Android engineers that I will be able to record voice with 16000 Hz frequency on for instance HTC Hero (Android 1.5)or similar device with os 1.5 or higher.
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Apr 1, 2010
the location where the audioflinger, surfaceflinger and cameraservice talk to MediaRecorder's APIs? Is there any relation between MediaRecorder and AudioRecord?
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Apr 6, 2010
How can I get the amplitude/volume when recording with AudioRecord?
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Nov 12, 2010
I've been having an issue with using AudioRecord for Android. I've read as much as I can find online about it, but I cannot seem to get a good initialization. I have tried the Android 2.2 emulator, 1.5 emulator and my phone, an HTC Incredible running Froyo. The emulators and my phone fail initialization. I've tried sampling rates of 8000, 11025, and 44100, formats of CHANNEL_IN_MONO/STEREO and CHANNEL_CONFIGURATION_MONO/STEREO, 8bit and 16bit encoding (8 bit makes the getMinBufferSize fail), and Audio Source of MIC and DEFAULT. All result in the variable test becoming 0 after running a get state(failed initialization). It seems from everything I've read that this should correctly initialize the object. I have played around with the multiplier on buflen, to have it range from 512 (the result of the function) to 102400 because I had heard that HTC devices require something above 8192. For testing my problem I made a new, small project that recreates my problem as simply as possible. I pull out the constants needed into local ints then run the constructor and access the getState method for checking if it worked. Code...
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Dec 6, 2009
Here is my AudioRecorder class, using audio record, why is it not producing any sound data?
import java.io.FileOutputStream; import java.io.IOException; import android.content.Context; import android.media.AudioFormat; import android.media.AudioRecord; import android.media.MediaRecorder; public class AudioRecorder implements Runnable {public boolean isRecording = false; byte[] tempBuffer = new byte[AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_CONFIGURATION_STEREO,......
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May 27, 2010
I am using the AudioRecord class to analize raw pcm bytes as it comes in the mic.
So thats working nicely. Now i need convert the pcm bytes into decibel.
I have a formula that takes sound presure in Pa into db. db = 20 * log10(Pa/ref Pa)
So the question is the bytes i am getting from audiorecorder from the buffer what is it is it amplitude pascal sound pressure or what.
I tried to putting the value into te formula but it comes back with very hight db so i do not think its right
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Oct 12, 2010
I am doing recording in following way and storing byte array in a binary file. But the binary file I am getting is not in any format. what can be the problem? code...
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Feb 15, 2010
My Android Java Application needs to record audio data into the RAM and process it. This is why I use the class "AudioRecord" and not the "MediaRecorder" (records only to file).
Till now, I used a busy loop polling with "read()" for the audio data. this has been working so far, but it peggs the CPU too much. Between two polls, I put the thread to sleep to avoid 100% CPU usage. However, this is not really a clean solution, since the time of the sleep is not guaranteed and you must subtract a security time in order not to loose audio snippets. This is not CPU optimal. I need as many free CPU cycles as possible for a parallel running thread.
Now I implemented the recording using the "OnRecordPositionUpdateListener". This looks very promising and the right way to do it according the SDK Docs. Everything seems to work (opening the audio device, read()ing the data etc.) but the Listner is never called.
I am working with a real Device, not under the Emulator. The Recording using a Busy Loop basically works (however not satifiying). Only the Callback Listener is never called.
Here is a snippet from my Sourcecode:
CODE:.........................
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May 9, 2010
On the nexus one, my app goes into Audio Record Stanby randomly after 0-40 seconds. I'm using the AudioRecord class, and while the standby is reported in the terminal, the AudioRecord instance reports the same states of RECORDSTATE_RECORDING and STATE_INITIALIZED throughout the entire sequence.
The bottom line is that when this anomaly occurs, audio is not captured. and this is what im working to prevent was only able to reproduce on nexus one android2.1 not g1 android1.6
I have looked extensively through the Android C/C++ libraries such as at this file: http://android.git.kernel.org/?p=platform/hardware/msm7k.git;a=blob_p... and [url]
Most interesting to me, is this line in AudioFlinger: [url]
Specifically the bool AudioFlinger::RecordThread::threadLoop()
As you can see, minput->standby() occurs in 4 different places in the code.
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May 13, 2010
I've seen posts regarding problems with the AudioRecord OnRecordPositionUpdateListener, but I haven't seen any real answers.
I'm using AudioRecord to record from the mic, and I want to get the input from the mic periodically so I can check sound levels and update a meter.
I set up the listener like this:
CODE:...........
What happens is that onMarkerReached gets called once, after the recorder is released, so that's not very useful.
Do I need to change the marker position and notification period? Is the listener working? Is there another way to accomplish periodically getting the mic input?
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Jun 19, 2009
In the Eclipse log I can clearly see a warning pop up (something about buffer overflow) every time I don't read from the AudioRecord buffer fast enough and consequently miss a chunk of audio samples. Is there any way I can detect that notification programatically so I know exactly when I have missed a chunk?
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May 4, 2010
I'm having this problem only on Motorola Milestone. Code:
CODE:................
The errorinformation I have (can't find more for the moment since I don't have a milestone myself for debugging):
CODE:..........................
Apparantly I'm not the only one with this problem. Some very similar threads I found (without solution):
http://groups.google.com/group/android-developers/browse_thread/thread/6dd24aeb484b2e40
[url]
[url]
[url]
[url]
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Jan 8, 2010
Any idea why reading bytes from AudioRecord would cause an error while reading shorts would not? The sound comes through great with short but I get only static with bytes.
Working code with short[]:
CODE:.......................
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Jan 13, 2010
I am trying to open a secure website (https) and the Moment stock browser balks. Will another browser work or is this a limitation on the phone?
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Jan 26, 2010
I've already done the update but both pre and post update, my Moment intermittently won't respond when getting a call. The call comes in, I hear the ringtone but no matter what buttons I press, the phone won't respond. I have to wait until voicemail kicks in or the call has ended.
I called Sprint technical support and they're going to send a new (I hope it's new) phone. I hate to set up the phone for the third time. Is there a fix or should I just bite the bullet and get the new? phone? Has anyone had this problem?
What experiences have you had with replacement phones from Sprint?
Should I be worried about getting a lemon phone?
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Aug 7, 2010
Does setcpu speed up the Moment at all or is its only real use for downclocking to save battery?
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Nov 24, 2009
Gizmodo has a Black Friday list and just added the Moment at a big discount. About the 12th deal listed under Cell phones. It's supposedly offered from Wirefly. Come on and join us the more the merrier. I got mine from BB @ $99.
Black Friday Deals: The Only List You Need - Black Friday - Gizmodo
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Dec 13, 2009
I currently have a voice plan, with sprint, for my dying LG Musik and my father's Palm Centro and am seeking to replace my Musik with a Samsung Moment. I have an upgrade available on my account, however I don't want to get locked into a data plan, since I rarely spend any time away from Wifi.
Does anyone know if there is a way for me to use my upgrade to aquire the Moment without commiting to the data plan?
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Dec 6, 2009
set up the wifes new moment her gmail still says 109 unread I went intp gmail on the pc and marked all as read then refreshed on the phone, no luck, tried going to manage apps and clearing all gmail and refreshing, still no luck short of one by one deleting all 109 any way to fix the count?
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Dec 8, 2009
So i had a hard decision to make when buying a new phone. It was between the HTC Hero and the Samsung Moment. After about 2 weeks I finally made the jump. A lot of the apps are on the I phone and I touch which is pretty cool. But can anyone tell me if it is possible to maybe change the phone kinda like jail breaking? Is there anyway of making the Moment a wireless tether for internee?
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Nov 9, 2009
Most every other "issue" to this phone has been a non-issue for me to this point.However, the one feature Samsung really screwed us on is the voice capabilities of the phone.I think they are tied to the Nuance system and therefore unusable by other apps like google voice search and where.I hope samsung or sprint writes a live search app for this phone.I bought the phone with the expectations of this phone being capable of voice commands without being limited by nuance.
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