Brilliant Tom, run services.msc and turn Windows Audio (off) ok. Den 27-Sep-12 16:51, Tommy Alderman skrev: > Since you are talking about "operating systems" and since most ham software > is written for Windows, a much less expensive solution is to just turn > off Windows sound generation. When Windows generates sounds, the CPU > first shuts > off the I/O ports, which causes CW stutter, generates the sounds and > then returns the I/O port to normal operation. Eliminating that sound generation > removes that 'stutter' generated by serial (or I/O ports) port. I have been > using audio generated CW driving a simple audio detector, to key my > transmitters for about 30 years and running in excess of 60 wpm, > without any > serial port generated stutter. And it cost a LOT less than purchasing > outboard keyers! > > 73, > Tom - W4BQF
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