"They can only hear what is in the hall as they play, not how the machine changes it."
The machines have been changing more places so that you can go into them.
Simple machines increase or change the direction of a force.
Methods, machines, and media have changed much since sound was first recorded.
In itself, the traditional machine has not changed from its original design and/or concept.
This machine has control over the C++ classes and can change variables or call member functions as normal.
The machines which these men had built so long before had not changed in any particular.
These machines are changing the way many people conduct business.
Do you think that machine can change God's memory?
But in five thousand years even a machine can change.