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digital_pads
2005 Mar 11
0
Re: Incoming echo cancel
...;slips' in the interface/timing system onboard the card?)
- Coding errors in the MMX vs. non-MMX routines
- Fundemental differences between the audio signals being passed to the customers depending on the service providers facilities (eg. variations in level padding: http://yarchive.net/phone/digital_pads.html)
Of all of these, I remain convinced that in most cases the real issue is something like the last. Namely that subtle differences between facilities are interfering with the assumptions the mathmatics in mec2 use - it's a very rigid model and makes use a number of fixed assumptions about...