Hi, I'm a guitar teacher. The other day, the manager of a school where I work had me sub for an absent teacher for one bass guitar lesson, without providing notice or prep time. (I have never taught bass or played it much at all.) The student was a beginner. I noticed that she had quite a weak, buzzy tone. She was keeping her left hand fingers quite flat when she fretted notes. This is something that beginning guitar students sometimes do and it is an error when they do it: the fingers should be curved at the last knuckle and should be close to perpendicular to the strings when fretting, usually. I told her to do this and her notes did sound clearer. I wonder, though, if maybe this technique could cause strain or tension in the hands, given that bass strings are heavier than guitar strings. Is there some sort of in-between technique or another left hand technique that is used, usually? I looked at a few videos on Youtube and read a few things online and saw conflicting information, generally. Most players on YT seemed to use a left hand technique that was closer to mine than to hers. However, I did see one instructional article online that stated that the first finger should be flat, rather than curved. I was wondering what people think and do. I do not want to lead a student astray! Thanks in advance!