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Low TX audio when using FLDigi on MacOS

minorsecond
minorsecond Member, Unconfirmed ✭✭
edited September 2023 in SmartSDR for Mac

I've gotten FLDigi to mostly work on macOS using Loopback to connect the audio interface, but when I go to transmit, the audio level received by SmartSDR is low and I get just a few watts of TX output, even if I bump up RF Power to 100.

Is there something I'm missing in the chain where I can increase the audio output from FLDigi by chance, or is this just the way things are?

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Answers

  • K3SF
    K3SF Member ✭✭✭

    can adjust gain in loopback


    see my loop-back to send data stream to fldigi


    fldigisetup.png


    fldigiLB.png

    you will see i have multiple fldigi versions in loopback...i did that cause if there is an issue with the current fldigi i an easily fall back a version


    also loopback is one place to increase gain for transmit

    hope this helps



    Paul K3SF

  • cdhowe
    cdhowe Member ✭
    If after adjusting all your loopback gains to 100%, and you still don't have sufficient audio (a situation which I ran into in my shack), download the program the xDAX helper program from

    https://dl3lsm.blogspot.com

    It has yet another volume control for the transmit channel that can boost the audio past what Loopback will do.

    Carl WG1V
  • ChrisAC9KH
    ChrisAC9KH Member ✭✭

    Kind of an old thread, but you don't need any extra boost on the audio signal. Fldigi has a transmit attenuator setting just to the left of the AFC in the bottom toolbar. It is adjustable for each mode of operation and it's likely set to -12dB or something.

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