- Network latency
- Wild variation: 0-10 seconds
- Possible help: use UDP instead of TCP for audio streams.
- Wait for better networks.
- Echo
- Microphone picks up speaker output, sends back to originator (delayed by 0.2 - 10 seconds).
- Partial solution: fade microphone input if not above threshold
(currently 25% of peak).
- Assumes that human voice volume greatly exceeds loudspeaker
volume as "heard" by microphone.
- Mitigated somewhat by microphone's built-in noise-cancellation.
- Better solution: use headphones (which eliminates possibility of echo).
- Vocal volume
- Too low: goes below telephony threshold (see above) and is not transmitted.
- Too high: overloads analog-to-digital converter (particularly on
Indy when in four-channel mode)
- Solution: conventional analog compressor/limiter
