Here is an mp3 of Psalm 41 sung to Tone 1 (using termination "g", according to the OSB chart) by the St. David's Episcopal Church, Austin, Compline Choir. The translation is from the 1979 U.S. Book of Common Prayer; the mp3 includes an antiphon on either side of the Psalm.
1 Happy are they who consider the poor and needy! *
the LORD will deliver them in the time of trouble.
2 The LORD preserves them and keeps them alive,
so that they may be happy in the land; *
he does not hand them over to the will of their enemies.
3 The LORD sustains them on their sickbed *
and ministers to them in their illness.
4 I said, "LORD, be merciful to me; *
heal me, for I have sinned against you."
5 My enemies are saying wicked things about me: *
"When will he die, and his name perish?"
6 Even if they come to see me, they speak empty words; *
their heart collects false rumors;
they go outside and spread them.
7 All my enemies whisper together about me *
and devise evil against me.
8 "A deadly thing," they say, "has fastened on him; *
he has taken to his bed and will never get up again."
9 Even my best friend, whom I trusted,
who broke bread with me, *
has lifted up his heel and turned against me.
10 But you, O LORD, be merciful to me and raise me up, *
and I shall repay them.
11 By this I know you are pleased with me, *
that my enemy does not triumph over me.
12 In my integrity you hold me fast, *
and shall set me before your face for ever.
13 Blessed be the LORD God of Israel, *
from age to age. Amen. Amen.
And here is a really good, quick-and-dirty tutorial on chant notation. On the left is the old Gregorian style; on the right is modern musical notation.
In my opinion, one of the most important things to know - and one of the only things you can't figure out on your own without hearing the music - is the "podatus." Here it is, first in Gregorian notation:
As the tutorial says: "When one note is written above another note like this, the bottom note is sung first, and then the note above it." Here's the modern notation:
That one is used over and over again, and many other neume-types are created from it.