QAudioInput:

On Windows Vista 32Bit SP2:

• qt/doc/html/qaudioinput.html
  Example code:
  QFile outputFile;
  QAudioInput *audio
  .....
  outputFile.setFileName("test.raw");
  outputFile.open( QIODevice::WriteOnly | QIODevice::Truncate );

QAudioFormat format;
// set up the format you want, eg.
format.setFrequency(8000);
format.setChannels(1);
format.setSampleSize(8);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::UnSignedInt);

audio = new QAudioInput(format, this);
QTimer::singleShot(3000, this, SLOT(stopRecording()));
audio->start(&outputFile);
...
And then:
void MyClass::stopRecording()

Issue on Windows:

• On void MyClass::stopRecording(), it seems to give error and then when application is closed, it does crash because heap allocation is not cleaned correctly.

Would work:
audio->start();
But then it doesn't give any output, of course.
(It doesn't crash on MAC OSX, but on MAC OSX it does save only 89 bytes to output).
*******
ALSO:
if you call:
audio->bytesReady();
Before
audio->start(&outputFile);

On windows Vista 32Bit SP2: It does crash into function of QT: (probably because period_size == 0, it tries divide by zero)
int QAudioInputPrivate::bytesReady() const
{
int buf = ((buffer_size/period_size)-waveFreeBlockCount)*period_size;
if(buf < 0)
buf = 0;
return buf;
}
*************
On MAC OSX (MacBook, Snow Leopard)
Example of Multimedia/audio/audioinput

• It can find devices
• But microphone is dull all a time.
  On windows (Vista SP2 32Bit), it shows some activity ok.
  *************
  As so far, I never got working audiooutput example. But I am not sure if it's bug or not.
  I have (probably) first got pcm audio data with audioinput example into file.