When I activate the baseband graph , the spectrum on the low-end range of the waterfall graph is is affected in the following way:
In the range between 0 and about 500 Hz the noise level of the waterfall graph raises significantly and displays a 1/F pattern.
This fenomenon is aggravated when the volume-control of the baseband graph is set to a higher level.
I suspect cross-talk between the input and the output channel of my Soundblaster PC128 card.
Has anyone experienced a similar behaviour on his configuration with perhaps an other type of soundcard?
I there another way to disable the output of the baseband graph than setting the ouput-volume to minimum?
Thanks fo the feedback.