What it does
Demonstrates how the sample-rate can be arbitrarily up-sampled with downstream components automatically adjusting themselves to the new sample rate.
In this example, the base rate of the audio file is up-sampled from 44100 Hz by a factor of 4 to 176400 Hz using a simple "sample-and-hold" re-sampler (the Hold Up: 4 block). The 1-tap Delay block automatically configures itself such that the desired delay is achieved irrespective of the sample-rate.
The down-sampler (Simple Down: 4 block) is required to bring the sample-rate down to that supported by the audio output device.