Here are some links to PODCAzT I made in the past having to do with Pentecost.
087 09-06-03 Veni Sancte Spiritus – The Pentecost Sequence dissected
061 08-05-17 Pope Leo I on a post-Pentecost weekday; Fr. Z rambles not quite aimlessly for a while
060 08-05-16 Pentecost customs; St. Ambrose on the dew of the Holy Spirit
059 08-05-15 Leo the Great on Pentecost fasting; Benedict XVI’s sermon for Pentecost Sunday
058 08-05-14 Ember Days; Chrysostom on St. Matthias; Prayer to the Holy Spirit
057 08-05-13 John Paul II on the unforgivable sin; Our Lady of Fatima and the vision of Hell
056 08-05-12 Octaves – Fr. Z rants & Augustine on Pentecost