Audio input headroom

I don’t have a number to set the input to, but the fact is that the higher the input, the less headroom the AGC has to do its work. Depending on the preset, it is often better to reduce the input by up to 5dB. In fact, it becomes a juggling act between killing the AGC and lifting the noise floor up into the audio spectrum, but in most cases, less input is the better way to go. There must be some way to reduce the gain in RadioBOSS, or the Windows mixer panel.