I bought an SGC external ADSP unit, with built in speaker, very nice
package with impressive performance, a couple of years ago. However,
when it is processing, it delays audio about 125 msec. This renders CW
sidetone unusable and my sending more unintelligible than usual
(grin). There IS a PTT input line on it, which I've not tried; perhaps
that disables processing during transmit.
For anyone else using an audio DSP unit, be aware processing may
affect your sidetone and provide for another source if it does.
Cortland
ka5s
