In my day we didn't have no fancy interwebs and youtube, we learned our bass parts by listening to 33 1/3 long playing record albums, picking up the tone arm ( look it up kids) over and over to hear the part we couldn't quite figure out so we just kept doing it over and over till we did figure it out or till there was a scratch in the record that made it skip and we had to buy a new one and listen to that one over and over and over till that one wore out so we just gave up and took those records to Keg parties and.................................... what were we talking about again ?