See Also: AudioStreamBasicDescription Members
The audio stack processes audio as a stream of audio packets. This data structure is used to describe the contents of these audio packets and contains information like the sample rate used for the audio samples, the format of the individual audio packets, the number of channels in the packets and the bits per channel, and so on.
This structure is filled in with the information when reading or decoding data. When you generate data, you should populate the structure with the proper values.
c# Example
//
// Standard pattern
//
int channels = 1;
sampleRate = AudioSession.CurrentHardwareSampleRate;
var format = new AudioStreamBasicDescription () {
SampleRate = sampleRate,
Format = AudioFormatType.LinearPCM,
FormatFlags = AudioFormatFlags.LinearPCMIsSignedInteger | AudioFormatFlags.LinearPCMIsPacked,
BitsPerChannel = 16,
ChannelsPerFrame = channels
BytesPerFrame = 2 * (interleaved ? channels : 1),
BytesPerPacket = 2,
FramesPerPacket = 1,
};
//
// Convenience Function for LinearPCM configurations
//
var format2 = AudioStreamBasicDescription.CreateLinearPCM (sampleRate, channelsperFrame, bitsPerChannel, bigEndian);