I'm working on Audio tuner application in order to tune musical instruments. User should play a note, then in my application I should show which frequency it has.
The first, I should access to microphone?
AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
sampleRate, AudioFormat.CHANNEL_IN_STEREO,
AudioFormat.ENCODING_PCM_16BIT, bufferSize);
Then I need to calculate frequency of sound. How can I do this?