A simple test was setup to determine how much latency there was,
from the time you tap one of the paddle handles,
until you actually hear the sidetone from your speaker or headphones,
when using two different approaches to computer audio.
- DIRECT SOUND was compared to ASIO -
(with the BEHRINGER UCA222)
DIRECT SOUND - took over 100 milliseconds
ASIO - took less than 30 milliseconds
Using an ASIO SOUND CARD reduces latency substantially to the point where it would be considered NEAR ZERO LATENCY - at less than 30 milliseconds.
DIRECT SOUND is not ideal therefore, at over 100 milliseconds; and potentially will be an obstacle and hindrance to sending precision morse code with your paddles and a software cw keyer application.
NOTE: the behringer uca222 is a budget asio sound card
and costs around 30 dollars.