[Elecraft] K3 Audio Monitor Delay

[Jim Brown]

On Sat, 16 Jan 2010 10:02:49 -0500, Paul Christensen wrote:


>When using a manual key or paddle, it necessitates the use of a local 
>sidetone injected into the headphone audio.

The same thing happens when a live talker (or singer) tries to use a mic 
on the field in a stadium (or sing the anthem) -- you hear own voice 
delayed by the acoustic travel time between the loudspeaker system and 
you, plus any DSP delay (typically 5-15msec), plus any delay used for 
synchronization of loudspeakers (typically 1-150 msec). The total delay 
can easily reach 120-150msec in a professional sports venue. VERY few 
people can sing or talk against that delay. Long ago, we learned to solve 
that problem just as you have outlined -- the singer/talker is fed an 
undelayed signal from his/her mic, plus any musical accompaniment, via 
either a local loudspeaker (floor monitor) or an earphone.  

73,

Jim Brown K9YC