Tim Dickinson wrote:

>Here's an easy one.
>
>I've just finished listening to a budget Seraphim recording of Bach's
>cantata "Wachet auf, rufft uns die stimme" BWV 140.  The fourth movement,
>the chorale "Zion hort die Wachter singen", is set to very familiar music
>that I know from some other Bach composition but can't quite place.

This tune is a Lutheran chorale melody that you have probably sung in
church.  It is sometimes set to "Now Let Every Tongue Adore Thee" or "Wake,
Awake for Night Is Flying." Dependant on the text used, this tune crops up
throughout the liturgical year.

Kevin Sutton