20.1.1 Configuration Objects 
Configuration objects (returned by newconfig()) have the
following methods:
- getqueuesize()
 - 
Return the queue size.
 
- setqueuesize(size)
 - 
Set the queue size.
 
- getwidth()
 - 
Get the sample width.
 
- setwidth(width)
 - 
Set the sample width.
 
- getchannels()
 - 
Get the channel count.
 
- setchannels(nchannels)
 - 
Set the channel count.
 
- getsampfmt()
 - 
Get the sample format.
 
- setsampfmt(sampfmt)
 - 
Set the sample format.
 
- getfloatmax()
 - 
Get the maximum value for floating sample formats.
 
- setfloatmax(floatmax)
 - 
Set the maximum value for floating sample formats.
 
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