That's absolutely normal. Just rotate the arm a little to the left instead of lifting the 4th finger by itself, then it will work fine. Or look for an alternative fingering.
Thanks. Another problem is that when playing chord shapes that require a little stretch (my max range is a major 10th, max comfortable is a major 9th, if this helps at all) that unless I concentrate on not doing it, I often find myself hitting wrong keys, should I actively practice not doing this, or will it go away in time simple by noticing when I do it and concentrating on not doing it?
I find that my ring finger does not have the same level of upwards control (upwards being when the palm is facing down) as my other fingers. Does this ever change with practice and time, or is it something I just need to work around?
Fingers should not be lifted (in isolation), expecially not high.Whatever finger, lifting the fingers is a very non-economical and strenous motion which doesn't allow real control and smoothness of sound. It's even worse with the 4th finger which doesn't have a dedicated tendon.The most economical way to produce a sound is to always rest the fingers on the surface of the key (except the thumb which will be away from the keyboard suspended in the air most of the time) and just pushing down and forward so that the carpal joint contracts and the second phalange flexes. There's no need to even slightly lift the fingers with this basic form and it applies to 90% of all fingers technique.The exceptions (for example trills and arpeggio) should not be achieved by lifting the fingers at the metacarp joints but by lifting the wrist or rotating the forearm.
Fingers should not be lifted (in isolation), expecially not high.The most economical way to produce a sound is to always rest the fingers on the surface of the key (except the thumb which will be away from the keyboard suspended in the air most of the time) and just pushing down and forward so that the carpal joint contracts and the second phalange flexes. There's no need to even slightly lift the fingers with this basic form and it applies to 90% of all fingers technique.
Please, could you clarify/amplify?. I am confused by the anatomical terms: carpal joint, second phalange, flexing and contracts.
Yes they were confusing.I meant metacarpal joints (knucles)Second phalange I mean the finger portion before the finger-tip portionFlexing I mean lengthening and contraction I mean the firming due to muscular shortening.
Do you mean moving as on the first video on the following link?https://www.musicandhealth.co.uk/movies/beast.html