On Wed, Feb 21, 2024 at 04:54 AM, Paul wrote:
It certainly made a difference for me, with the new insert I have mic gain set at 27 now which seemed about right for my voice which is quite bassey to start with. Probably need to find a way to adjust frequency reaponse to really get the best out of it but happy it is working now :-)
Next adjustment is receive audio now as there is a high level of noise even without an antenna connected as well as quite low audio gain as rx volume setting needs to be in the 90-100 setting to be usable.
I did notice when I was working on USB headset connectivity that I can reduce the background level of noise as part of the command line approach I tried but not enough audio gain for that approach yet, still work in progress :-)
Regards
Paul
Paul -- the "bassey" problem is EXACTLY what I have three high school students (AP PreCalculus) working on as a Science Fair project.? ?I have added command line code to allow simple changes to treble and bass of the transmitted signal -- it WORKS -- and we are trying to do a scientific study of improvement in readability versus White Gaussian Noise.? ?We have a way to go, but I may be able to release alpha level of software which might be helpful to you.? ?We are able to quash bass below a chosen level (e.g. 300 Hz) and boost treble above a chosen point (e.g. 2kHz) by a desired amount.? ? That part works.? ?We are using the innovative IONOS test gear from the Winlink people, which is designed to simulate just about every thing "bad" that the Ionosphere and HF comms can do.? ?It works with a Teensy, reading in audio on a 1/8" plug, adding in the desired "badness" and outputing on a 1/8" plug.? Amazing technology that I picked up from them.
73
Gordon KX4Z
