[android-developers] sound recognition and FFT problem
Dear all,
I am struggling a lot to get sound recognition working.
Essentially I would like to use the microphone and recognize when a
specific note has been played (as a guitar tuner).
I am trying to use GDX library for FFT: http://code.google.com/p/libgdx/
What is happening is that with the same frequency originated from a
signal generator, I don't get always the same results. And most of all
I get very different results from my ZTE Orange San Francisco versus a
Galaxy mobile (although i suspect the ZTE is the one to blame :-)
This is my code.
private static final int RECORDER_SAMPLERATE = 44100;;
private static final int RECORDER_CHANNELS =
AudioFormat.CHANNEL_CONFIGURATION_MONO;
private static final int RECORDER_AUDIO_ENCODING =
AudioFormat.ENCODING_PCM_16BIT;
When I start the 'record' button I initialise the AudioRecorder and
start listening into a separate thread:
private AudioRecord recorder = null;
recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
RECORDER_SAMPLERATE,
RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING,
bufferSize);
and the listening function follows:
int MULTIPLIER = 1; // -- I increase this if I wish to
concatenate input buffers coming from microphone
short[] data = new short[bufferSize];
float[] fft_cpx;
float[] tmpR, tmpI;
float[] new_array = new float[bufferSize*MULTIPLIER];
double[] real = new double[bufferSize*MULTIPLIER];
double[] imag = new double[bufferSize*MULTIPLIER];
double[] mag = new double[bufferSize*MULTIPLIER];
Log.i(TAG, Ready to go, buffer size: +bufferSize); //--- it is
4096 when using 44Khz, but at each read only 2048 is retreived
fft = new FFT(bufferSize*MULTIPLIER, RECORDER_SAMPLERATE);
long t1, t2, t3, deltaT;
while (isRecording) {
t1 = System.currentTimeMillis();
int index = 0;
for (int j=0; jMULTIPLIER; ++j) {
int n = recorder.read(data, 0, bufferSize); //
--
it reads 2048 = n
Log.i(TAG, Data read (j=+j+): +n);
for ( int z=0; zn; ++z) {
new_array[index] = data[z];
++index;
}
}
t2 = System.currentTimeMillis();
deltaT = t2-t1;
Log.i(TAG, Data read in TIME: +deltaT+ (+t1+,+t2+));
Log.i(TAG, Global index: +index);
fft.forward(new_array);
fft_cpx = fft.getSpectrum();
// Find Max and Max position in CPX
tmpR = fft.getRealPart();
tmpI = fft.getImaginaryPart();
arrDet.peakValue = 0; //arrDet
is a dummy structure where I store peak value and position
for (int i = 0; i new_array.length; i++) {
real[i] = (double) tmpR[i];
imag[i] = (double) tmpI[i];
mag[i] = Math.sqrt((real[i] * real[i]) + (imag[i] *
imag[i]));
if ( mag[i] arrDet.peakValue ) {
arrDet.peakValue = mag[i];
arrDet.position = i;
}
}
int FrequencyN = 0;
if ( new_array.length!= 0 )
FrequencyN = RECORDER_SAMPLERATE * arrDet.position /
new_array.length; //bufferSize;
int FrequencyBS = RECORDER_SAMPLERATE * arrDet.position /
bufferSize;
Log.i(TAG, @ F(N)is: + FrequencyN + \tF (BS)is: +FrequencyBS
+ \tpos: +arrDet.position );
}
Results:
For example, if I get:
INPUT FREQUENCY = 1000
Log: Frequency (N) is 8010
@ 744 // -- position
Or
INPUT FREQUENCY = 1000
Log: Frequency (N) is 3003
@ 279 // -- position
Or
INPUT FREQUENCY = 1000
Log: Frequency (N) is 6007
@ 558 // -- position
QUESTIONS:
1) any idea about what I am doing silly?
2) is it enough to read from the microphone only once? Or should I
rather concatenate buffers?
I am not noticing any more stability to be honest...
thanks for any help!
Mik
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[android-developers] Re: sound recognition and FFT problem
PS: as signal generator I am using this one: http://www.gwinstek.com.tw/en/product/productdetail.aspx?pid=5mid=73id=105 -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Bluetooth Low Energy (BLE) - bluetooth 4.0 support
Dear all, I am looking forward the time when we could connect our android devices towards devices supporting BLE. Obviously I expect that android devices will support Dual profile (capability to connect via bluetooth towards old devices and towards Bluetooth low energy devices). If I understood correctly Android 4.0 platform should be able to handle the Bluetooth Health Device Profile is that bluetooth 4.0? Does anyone know if there is any existing device supporting BLE? Motorola Razr seems to be supporting Bluetooth 4.0 according to theirs specs, but it runs Android 2.3 Did anyone had any experience with this technology? Any clarification to my confused mind is highly appreciated. Thanks, Mik -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] ERROR: cannot recover key (Eclipse)
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[android-developers] Re: Newbie Question for phone and tablet apps
If the app should provide the same functionality for both platforms I'd say go for doing one app for both and just tweak the interface to adapt to different screen sizes. -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: app doesn't install anymore!
I am starting the app from the view where all the other applications are placed, whatever is called. And even if it displays the icon, it says that the application is not installed. Then if I go in : Settings - Application settings - manage applications my app appears there as installed. Honestly I think we are chasing the problem in the wrong path: even installing from SD card it is perfectly fine, indeed that was the only option I had when I purchased the mobile phone, as it was sim locked with developer options disabled. Then I unlock it and changed OS version (now running 2.2) and I can do the installation in the way you suggest and mostly important the device debugging. But the reason for which the application starts while debugging from eclipse and doesn't when installed is still a mystery. I wonder if it is due to the signature somehow, but again I am using same key + password + alias than before and the error message should be different. Thanks anyway! On Jan 26, 11:25 pm, TreKing treking...@gmail.com wrote: On Wed, Jan 26, 2011 at 5:07 PM, Mik mam.marche...@gmail.com wrote: But then when I try to run it from the GUI menu a toast message tells me: Application is not installed in your phone What GUI Menu? Are you starting it from the Launcher or the home screen? --- -- TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: app doesn't install anymore!
SOLVED ! For some reasons I had in my manifest TWICE the tag: activity android:name=.myActivity (It is mostly due to writing code late night...) TreKing: thanks for your help. To learn about the device debugging was surely worthy. Mik -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: app doesn't install anymore!
This is very annoying... when debugging on device it works perfectly. So I uninstalled, then I signed the file using eclipse (as always) and then I transfered it into SD card to install it. And again, it appears to install but then when I try to execute it it won't, claiming that it is not installed. I don't understand what is happening. Has anyone seen this? Michele -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: app doesn't install anymore!
I am not sure, I always have done it in this way What is the recommended way? I have got today working for the first time the debugger on device so I wouldn't be surprised if there is a more convenient way to install a signed app On Jan 26, 10:32 pm, Mik mam.marche...@gmail.com wrote: This is very annoying... when debugging on device it works perfectly. So I uninstalled, then I signed the file using eclipse (as always) and then I transfered it into SD card to install it. And again, it appears to install but then when I try to execute it it won't, claiming that it is not installed. I don't understand what is happening. Has anyone seen this? Michele -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: app doesn't install anymore!
unfortunately it didn't work: same result then when installing from SD card: $ sudo platform-tools/adb install /home/mik/workspace/signed/ myapp.apk 1669 KB/s (1453881 bytes in 0.850s) pkg: /data/local/tmp/myapp.apk Success But then when I try to run it from the GUI menu a toast message tells me: Application is not installed in your phone While from Manage Applications menu, I can still see it... Thanks for your help by the way! Mik On Jan 26, 10:41 pm, TreKing treking...@gmail.com wrote: On Wed, Jan 26, 2011 at 4:39 PM, Mik mam.marche...@gmail.com wrote: I wouldn't be surprised if there is a more convenient way to install a signed app adb -d install path to app Of course, uninstalling the previous version that was debug-key-signed. --- -- TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] app doesn't install anymore!
Hi guys, I'm confused about the behavior of the new version of my simple app. First two versions were ok, now I've done some changes, I've created using Eclipse a signed file (as before) and when I try to install it on my device (from SD card) it first says: Application installed. Then I try to open it (from installer) and it says: The application package installer (process com.android.packageinstaller) has stopped unexpectedly. Please try again. While if I try to launch it from the main menu it says: application not installed on your phone If I try to install the previous signed version, it still works... I am really confused and blind from the solution... Any idea please? Mik PS: what do you use to read log from device? -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] Re: app doesn't install anymore!
On Jan 25, 11:45 pm, TreKing treking...@gmail.com wrote: On Tue, Jan 25, 2011 at 5:42 PM, Mik mam.marche...@gmail.com wrote: Any idea please? Debug your app. Forgot to mention that it works perfectly on the emulator... PS: what do you use to read log from device? The debugger. Or DDMS. Or a LogCat app. I assume you mean on device debugging? I didn't know it was possible (I am a beginner). Thanks I'll search how to do it -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
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