Psalm 81 to 100's tune

A member of the Lovers of Metrical Psalmody Facebook group alerted us to this metrical psalm performed by the Robert Shaw Festival Singers: To God Our Strength. The text is a metrical version of Psalm 81 with music arranged by Alice Parker and Robert Shaw, but, remarkably, it's sung (altogether too quickly) to the Genevan melody for Psalm 100. The recording was released in 1993.

Addendum: I have corrected one of the sentences above. Parker and Shaw arranged the music, but the text is from Henry Ainsworth's Psalter, from which the 17th-century community known to Americans as the Pilgrims sang. Here is the text of stanzas 1, 2, and 7:

To God our strength, shout joyfully;
To Jacob’s God shout triumphing.
Take up a psalm, and timbrel bring,
The pleasant harp with psaltery.
     
Blow up the trumpet at new‐moon:
In set time at day of our feast.
For it to Isr'el is an heast:
To Jacob’s God due to be doon.
    
Jehovah God of thee I am,
Which thee ascending up did guide
From land of Egypt. Open wide
Thy mouth, and I will fill the same.

A copy of the Ainsworth Psalter can be purchased here.