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Channels versus Streams

Hi,
My name is joey and I am new to this group. I have started reading the
Core Audio documentation, this is an excerpt from the doc I am having
difficulty grasping.

> Audio Devices(Contains many Audio, and an
> An Audio Device is further divided into Audio Streams. An Audio Stream
> is a
> set of n channels of interleaved floating point data in the case of
> PCM data, or a
> discreet and complete data stream of encoded data.
>
> Audio Devices are addressed in the API by specifying whether the
> request is for
> input or output and its channel number. Channel 0 always represents the
> master channel for a device.
>
> The channel numbers for each Audio Stream in an
> Audio Device always start at 0 and are numbered consecutively up to
> the total
> number of channels in that particular Audio Stream.

It seems to say
AudioDevices contain many AudioStreams
AudioDevices contain many channels

AudioStreams contain many channels


How are the channels in an AudioStream related to the channels in an
AudioDevice???

Are there any good diagrams out there, or any good books out yet that
discuss the low level of CoreAudio?

thanks,
joey
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