I must have just gotten the parameters wrong. I can create a mono file. But I used AudioFormat.CHANNEL_IN_MONO, not AudioFormat.CHANNEL_CONFIGURATION_MONO.
On May 1, 9:41 am, niko20 <nikolatesl...@yahoo.com> wrote: > Yes its a bug, sounds like the WAV header is wrong. You'll have to > hack at that source to fix it.. > > On Apr 29, 5:51 pm, pac <patty.c...@gmail.com> wrote: > > > > > I'm developing with Android 2.1 on a Nexus One with firmware 2.1 > > update 1. > > > I'm using the RehearsalAudioRecorder class from here: > > >http://rehearsalassist.svn.sourceforge.net/viewvc/rehearsalassist/and... > > > public RehearsalAudioRecorder(boolean uncompressed, int audioSource, > > int sampleRate, int channelConfig, > > int audioFormat) > > { > > try > > { > > rUncompressed = uncompressed; > > if (rUncompressed) > > { // RECORDING_UNCOMPRESSED > > if (audioFormat == > > AudioFormat.ENCODING_PCM_16BIT) > > { > > bSamples = 16; > > } > > else > > { > > bSamples = 8; > > } > > > if (channelConfig == > > AudioFormat.CHANNEL_CONFIGURATION_MONO) > > { > > nChannels = 1; > > } > > else > > { > > nChannels = 2; > > } > > > aSource = audioSource; > > sRate = sampleRate; > > aFormat = audioFormat; > > > framePeriod = sampleRate * TIMER_INTERVAL / > > 1000; > > bufferSize = framePeriod * 2 * bSamples * > > nChannels / 8; > > if (bufferSize < > > AudioRecord.getMinBufferSize(sampleRate, > > channelConfig, audioFormat)) > > { // Check to make sure buffer size is not > > smaller than the > > smallest allowed one > > bufferSize = > > AudioRecord.getMinBufferSize(sampleRate, > > channelConfig, audioFormat); > > > // Set frame period and timer > > interval accordingly > > framePeriod = bufferSize / ( 2 * > > bSamples * nChannels / 8 ); > > > > Log.w(RehearsalAudioRecorder.class.getName(), "Increasing buffer > > size to " + Integer.toString(bufferSize)); > > } > > > aRecorder = new AudioRecord(audioSource, > > sampleRate, > > channelConfig, audioFormat, bufferSize); > > if (aRecorder.getState() != > > AudioRecord.STATE_INITIALIZED) > > throw new Exception("AudioRecord > > initialization failed"); > > // > > aRecorder.setRecordPositionUpdateListener(updateListener); > > > > aRecorder.setPositionNotificationPeriod(framePeriod); > > } else > > { // RECORDING_COMPRESSED > > mRecorder = new MediaRecorder(); > > > > mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); > > > > mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); > > > > mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); > > } > > cAmplitude = 0; > > fPath = null; > > state = State.INITIALIZING; > > } catch (Exception e) > > { > > if (e.getMessage() != null) > > { > > > > Log.e(RehearsalAudioRecorder.class.getName(), e.getMessage()); > > } > > else > > { > > > > Log.e(RehearsalAudioRecorder.class.getName(), "Unknown error > > occurred while initializing recording"); > > } > > state = State.ERROR; > > } > > } > > > Here's how I'm instantiating it: > > RehearsalAudioRecorder recorder = new > > RehearsalAudioRecorder( > > > > RehearsalAudioRecorder.RECORDING_UNCOMPRESSED, > > > > MediaRecorder.AudioSource.MIC, > > 16000, > > > > AudioFormat.CHANNEL_IN_FRONT, > > > > AudioFormat.CHANNEL_CONFIGURATION_MONO); > > > I write a .wav file to the SD card. I specified mono, and I checked > > that CHANNEL_CONFIGURATION_MONO is indeed set in the AudioRecord > > object. But when I try to play the file, it's treated as if it's > > stereo, and voices sound like chipmunks. Apparently the header > > information is wrong. For instance, I open the .wav file in Audacity, > > and Audacity says it's stereo. > > > Is this a bug? What can I do? > > > -- > > 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 > > athttp://groups.google.com/group/android-developers?hl=en > > -- > 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 > athttp://groups.google.com/group/android-developers?hl=en -- 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
