It sounds like you are experiencing an issue with the audio settings in your Sam Broadcaster software. Here are a few things you can try to fix this issue:
Check the audio settings in your Sam Broadcaster software and make sure that the "Bass Boost" or "Equalizer" settings are not turned up too high. You may need to adjust these settings to reduce the amount of bass in your audio.
Check the audio settings on your computer and make sure that any equalizer or bass boost settings are not turned up too high.
If you are using a microphone or other external audio input device, check the settings on that device to make sure it is not causing the issue.
Make sure that your audio cables and connections are secure and working properly.
If the problem persists, you may want to try uninstalling and reinstalling the Sam Broadcaster software. This may help resolve any issues with the software itself.
I hope these suggestions help resolve your issue with the excessive bass in your audio. If you continue to have problems, you may want to consider seeking additional help or support from the Sam Broadcaster community or the manufacturer of the software.