The spectrum is very wrong. Based on your spectrum, it seems you have disconnected and reconnected the audio cable at least once, which indicates that the settings and software for your audio input port are not causing any problems. This situation generally does not affect the software decoding. I recommend reducing the audio input gain and then checking if the automatic NTP offset is working correctly.
A few days ago, when I borrowed someone else's G90s, I accidentally connected an ACC cable incorrectly, which also caused some noise on the left channel. However, this didn't affect the normal decoding of the TX5DR. If it still doesn't work, you can ask for help in the TX5DR community group.
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