BufRateScale

Returns a ratio by which the playback of the buffer at the provided index is to be scaled relative to the current sample rate of the server.

buffer sample rate / server sample rate

===Examples===

// rate scale of local buffer
play {
 val buf = LocalBuf(1024)
 BufRateScale.ir(buf).poll(0) // reports 1.0 because buffer rate matches server rate
}