1. CSIS Seminar series, July 2010 Chris Edwards Department of Information Science University of Otago

5. SSL Centuri core C-SB Stage Unit SSL DSP Units SSL Console C-SB Stage Unit Network optical fibre (2 km reach) DAW (Mac) DAW (Mac) 48 mic input channels per stage unit MADI (Multi-Channel Audio Digital Interface) O/B Effects Units O/B Effects Units

7. KAREN NZ Network Map Source: http://www.karen.net.nz/topology/

8. Amplitude Time

13. TCP UDP 4. Transport IP 3. Network Ethernet 2. Data Link UTP 1. Physical

23. Satellite 1Satellite 2 You Are Here r1r1 r2r2 Satellite positions are known Messages are time-stamped, so time of sending is known Delay in receiving message can be measured Distance is proportional to delay Intersection of distances determines actual position

26. Shera (1998): block diagram

29. Frequency is the derivative of phase!

36. Buffer (frames/period × nperiods) Period 1 512 frames Period 2 512 frames Audio Hardware Software Period 1 512 frames

43. Drums @ Dunedin Guitar @ Auckland 15 ms delay 1. Drum part provides reference timing 2. Guitar plays in sync with heard drum sound 3. Guitar part sounds late by 30 ms

45. Note: these are averages (“show me the histograms!”)

46. d = v / t

54. ?