I'm using a class that uses AudioRecord. RehearsalAudioRecorder recorder = new RehearsalAudioRecorder( RehearsalAudioRecorder.RECORDING_UNCOMPRESSED, MediaRecorder.AudioSource.MIC, 16000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
The RehearsalAudioRecorder constructor instantiates an AudioRecord: aRecorder = new AudioRecord(audioSource, sampleRate, channelConfig, audioFormat, bufferSize); I'm creating a .wav file on the SD card. I'm experiencing a 5 second delay in the recording; I play back the file, and the recording starts about 5 seconds after I started speaking. I did some measurements with System.currentTimeMillis(), and I measured the following: buffer size: 204800 bytes constructor: 17 ms write the file header: 6 ms AudioRecord.startRecording(): 483 ms AudioRecord.read(): 6268 ms There's correspondingly less delay when I use a smaller buffer: buffer size: 81920 bytes constructor: 16 ms write the file header: 5 ms AudioRecord.startRecording(): 486 ms AudioRecord.read(): 2427 ms Does anyone have any suggestions as to how to reduce the delay? It's still unacceptable to have a few seconds delay. -- 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