Question on mordent - Bach BWV 939

[atticus]

Hi all,

When playing a mordent in the LH that occurs on the first beat of a measure in which the RH also plays on the first beat, what note of the mordent sequence plays with the RH?  An example is in measure 9 of Bach Prelude BWV 939 (LH mordent is G, F#, G and RH is B).

Thanks,
atticus

[xvimbi]

You are asking whether to play on the beat or before the beat. Check out the following site, which also  covers other ornaments you will be running into.

https://members.aol.com/kjvisbest/jsb_ornm.htm

Have fun!

[atticus]

Thanks very much, xvimbi!  From this site it looks like the mordent should be played on the beat.

Take care,
atticus