Remember, you can check the full document Paschale Solemnitatis, on this site, among many on the internet. Many parish musicians know the prescription for no instrumental music during Lent:
17. “In Lent the altar should not be decorated with flowers, and musical instruments may be played only to give necessary support to the singing”; (Ceremonial of Bishops, 252) this is in order that the penitential character of the season be preserved.
Most ignore it. Flowers are a non-starter for sure. But the deletion of instrumental music can be a head-scratcher.
This is the universal music signature of Lent:
18. Likewise from the beginning of Lent until the paschal Vigil, “Alleluia” is to be omitted in all celebrations, even on solemnities and feasts. (Cf. General Norms for the Liturgical Year and the Calendar, 28)
Keep with the spirit of baptism, penance, and the Paschal Mystery:
19. The chants to be sung in celebrations especially of the Eucharist, and also at devotional exercises should be in harmony with the spirit of the season and the liturgical texts.
In my own programming, I lean to psalms and hymn texts that speak of Christ.
And a word on devotions:
20. Devotional exercises which harmonize with the Lenten season are to be encouraged, for example, “The Stations of the Cross”; they should help foster the liturgical spirit with which the faithful can prepare themselves for the celebration of Christ’s paschal mystery.
The Way of the Cross is nearly universal, I’d say. Nothing else really comes close.