SBE Chapter 37
SBE Chapter 37
July 6, 2022  

Prior Meetings

All Are Welcome at SBE Meetings;
SBE Membership is not Required


Mr. Steve Densmore 
Mr. Bob Eburg 
Mr. J. Eric Hoehn 
Mr. Andrew Janitschek 
Mr. Andrew Johnson 
Mr. Mark Johnson 
Mr. David Layer 
Mr. Fee Lee 
Mr. Don Lockett 
Mrs. Laura Mir 
Mr. Brian Oliger 
Mr. Art Reed 
Mr. Thomas Shedlick 
Mr. Geoff Steadman 

Audio Time Compression

25-Seven Systems

Guest Speaker: Geoff Steadman

July 20, 2010

For our July meeting we focused on the history and current developments in audio time compression. Our featured presenter was Geoff Steadman, president and co-founder of 25-Seven Systems. Geoff detailed the important research and scientific findings regarding audio intelligibility and comprehension, described the past and present means of audio time compression, and demonstrated acceptable levels of real-time audio compression. He demonstrated 25-Seven Systems Audio Time Manager, Program Length Manager, and Program Delay Manager (Profanity Delay), and discussed PPM insertion and real life applications of these products.

RFA (Radio Free Asia) hosted our meeting. RFA was a test partner with 25-Seven Systems, looking at the effects of audio time compression on non-English languages. RFA conducted testing across all nine language services, found that time compression was possible, and that it could be used at up to 7% compression/expansion rates with no audible difference to the listener.

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