It might be easier to add a 25uS pre-emphasis filter ahead of the audio input if the transmitter has no ability to change it itself to get up to the required 75uS used in the US.
Can be as simple as a resistor/capacitor "RC" high pass filter. What values would have to be calculated using some online tool or equation. Even easier just plug an audio equalizer in and lift the high frequencies slightly to adjust for best sound.
Since a few of your other posts were somewhat on the same topic I would say the same can be done to match or remove pre-emphasis or even de-emphasis to match transmitter audio input to your processing equipment. It's more of a hack than anything but it can work. It's usually best to completely avoid pre-emphasis at the transmitter itself and do it within audio processing which it appears you already know, but in a pinch you can get away with outboard filtering the built-in filter.. so to speak
It might be easier to add a 25uS pre-emphasis filter ahead of the audio input if the transmitter has no ability to change it itself to get up to the required 75uS used in the US.
Can be as simple as a resistor/capacitor "RC" high pass filter. What values would have to be calculated using some online tool or equation. Even easier just plug an audio equalizer in and lift the high frequencies slightly to adjust for best sound.
Since a few of your other posts were somewhat on the same topic I would say the same can be done to match or remove pre-emphasis or even de-emphasis to match transmitter audio input to your processing equipment. It's more of a hack than anything but it can work. It's usually best to completely avoid pre-emphasis at the transmitter itself and do it within audio processing which it appears you already know, but in a pinch you can get away with outboard filtering the built-in filter.. so to speak
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~