MadSci Network: Computer Science
Query:

Re: How can a cd player be random with no seed number?

Date: Sun Jul 8 07:53:02 2001
Posted By: Mike Harrison, , Freelance electronics consultant, White Wing Logic
Area of science: Computer Science
ID: 994351165.Cs
Message:

Although CD players have no 'real-time' clock, some randomnes can be 
obtained from their interaction with the user. A typical method would be 
to measure the time interval between button-presses - the microprocessor 
in a CD player can easily do this with a resolution of a few microseconds, 
so the last few digits of this time value provides enough randomness to 
seed 'random play' functions. 


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