How to adjust microphone sensitivity while recording audio in android

by

As I understand you don’t want any automatic adjustments, only manual from the UI. There is no built-in functionality for this in Android, instead you have to modify your data manually.

Suppose you use read (short[] audioData, int offsetInShorts, int sizeInShorts) for reading the stream. So you should just do something like this:

float gain = getGain(); // taken from the UI control, perhaps in range from 0.0 to 2.0
int numRead = read(audioData, 0, SIZE);
if (numRead > 0) {
    for (int i = 0; i < numRead; ++i) {
        audioData[i] = (short)Math.min((int)(audioData[i] * gain), (int)Short.MAX_VALUE);
    }
}

Math.min is used to prevent overflow if gain is greater than 1.

More Related Contents:

  1. Android AudioRecord class – process live mic audio quickly, set up callback function
  2. Android audio FFT to retrieve specific frequency magnitude using audiorecord
  3. Writing PCM recorded data into a .wav file (java android)
  4. How to sample microphone on Android without recording to get live amplitude/level?
  5. How to work with xml and java (android) [closed]
  6. android.os.NetworkOnMainThreadException [duplicate]
  7. Start another activity with button
  8. Read a pdf file from assets folder
  9. Set margins in a LinearLayout programmatically
  10. Using Singleton design pattern for SQLiteDatabase
  11. Android requires compiler compliance level 5.0 or 6.0. Found ‘1.7’ instead. Please use Android Tools > Fix Project Properties
  12. android.view.InflateException Error inflating class android.webkit.WebView
  13. How to scroll to the bottom of a RecyclerView? scrollToPosition doesn’t work
  14. What do I use now that Handler() is deprecated?
  15. Difference between getExternalFilesDir and getExternalStorageDirectory()
  16. Android: Pass data(extras) to a fragment
  17. How do I manage cookies with HttpClient in Android and/or Java?
  18. Android Resource – Array of Arrays
  19. Java / Android – How to print out a full stack trace?
  20. Deprecated ManagedQuery() issue
  21. notifyDataSetChanged() makes the list refresh and scroll jumps back to the top
  22. How to retrieve a list of available/installed fonts in android?
  23. Open source face recognition for Android [closed]
  24. Android 2.2 wifi hotspot API
  25. Android: Cannot perform this operation because the connection pool has been closed
  26. How to measure elapsed time
  27. Bitmap getWidth returns wrong value
  28. Error on some devices – couldn’t find class ‘com.google.android.gms.measurement.internal.zzz’
  29. android admob resize on landscape
  30. Using the camera activity in Android

Leave a Comment