Sampling and having no ear for hearing pitches to find out the keys of songs is the worst combination when you want to add a bass line to your tracks. I know that you can filter the bass out of the sample and then mess with it from there, but it's still limited in terms of the notes you can use (unless there is some way of taking one bass note from a sample and spreading it chromatically over all the keys). Some samples don't even have a bass line. Sometimes I'll just boost the low end of the sample to just help cover the empty feeling of the track, but it still isn't the same as creating your own bass line to give your track the groove that you want. Is there any way around all this?