Hm. Attending Mass elsewhere. The new pastor said he'd have to evaluate if enough people come to Mass to warrant having me in the future for feast days. Ah well.

TCJ, I wonder if enough people will come to warrant him HAVING Mass.

Entrance: Hail Holy Queen
WLP Psalm
ICEL Chant Mass
Offertory: Ave Maria by a local composer
Recessional: Immaculate Mary
Organ Postlude: Trying to decide between a Couperin or a Marchand fugue

Incidental music as needed.

No mystery. We have a lady in the choir who was my predecessor as DM and organist. She is older now, of course, but still composing church music.

'The new pastor said he'd evaluate...if enough people come... to warrant having me in the future for feast days.'

This is a deplorable bit of ratiocination. Perhaps it's even sick. It certainly betrays a comprehension of feast days and solemnities that is spiritually unhealthy (sick). The Church understands a solemnity (of which the Assumption is one) to be an occasion of the greatest solemnitas, which is to say, festivity, in the manner of celebration of the Holy Mysteries on a day so designated. It doesn't matter what the attendance is. This is an irrelevant factor. All the liturgical stops are pulled out and no solemnity is foresworn, no matter if there are three people in attendance. The best acolytes, the best incense, the best chanting, the best efforts of the choir, the organist, the best cantors and lectors, and all others who are a part of the parish's musical ministry are to be marshalled because the feast itself is of such importance as to demand them. And, if one's priest is concerned that few may show up, he has his work cut out for him in impressing upon his people that their attendance at the divine liturgy is expected. But, whether they come or don't come, the Holy Mysteries are celebrated in their due manner.

The music for the Mass is the music for the Mass regardless if anyone is there or not.

When I was performing in bands (the early years), I used to tell my band mates that we need to play our best even if only one person was in the audience.

Professionalism is Professionalism even if no one is watching.

There is a profound mistake here.

Some human activities are done for the sake of some good objective, and it can be wise to do them or not do them, depending on how effective they are.

But some activities are done for their own sake, even if nothing humanly observable results from the act. We see this in actions as simple as play. Anyone who only plays in order to achieve some result -- fitness or social interaction -- is missing an important dimension of what it means to be a human being.

All the more we worship God for the sake of worshipping God. It is an end in itself: to be the Church of Jesus Christ turning to God in adoration and praise to offer the Holy Sacrifice.

Organ Prelude
Ave Maria: Guilmant
(score)
http://imslp.org/wiki/L'Organiste_liturgiste,_Op.65_(Guilmant,_Alexandre)
see Book 1 pdf page 9-11
(video)
https://www.youtube.com/watch?v=C5IJ2pU0NUM

Organ Postlude
Ave Maris Stella: Guilmant
(score)
http://imslp.org/wiki/L'Organiste_liturgiste,_Op.65_(Guilmant,_Alexandre)
see Book 2 pdf page 1-6
(video)
https://www.youtube.com/watch?v=wkJSF3pn0x0

Not quite for Assumption, but this is for a mass to be held at the end of a short Marian Pilgrimage tomorrow. I think that this feast falls on a Saturday next year so the Pilgrimmage will be held on that day:

Processional Hymn: "Immaculate Mary" (LOURDES)
Introit Antiphon: Salve Sancta Parents (GR)
Offertory Antiphon: Ave Maria (Chant Hymn Tone)
Offertory Hymn: "Help of Christians, Guard This Land" (CAMILLA)
Communion Antiphon: Beata Viscera (GR)
Communion Hymn: "Sing My Tongue the Saviour's Glory (PANGE LINGUA)
Thanksgiving Hymn: "Soul of My Saviour" (ANIMA CHRISTI)
Marian Antiphon: Salve Regina (Tonus Simplex)

Mass Ordinary: Missa Simplex I (GS)
Psalm: Simplified Chant Tone I
Alleluia: Tone VI Easter Alleluia
Pater Noster: AECL English Chant Tone (known as the "Australian Tone")

Only the Introit, Offertory and Communion Antiphons will be sung by the small choir, the rest will be sung by the whole congregation with organ accompaniment.