Final answer:
At 0:38 in Palestrina's Gloria from the Pope Marcellus Mass, other voices enter in a polyphonic texture with smooth and melodic lines, illustrating the harmonious use of consonant intervals and mastery of counterpoint characteristic of Renaissance music.
Step-by-step explanation:
When the other voices enter during the Gloria from Palestrina's Pope Marcellus Mass at around 0:38, the text setting is described as polyphonic, which means multiple independent melody lines (voices) are performed simultaneously. Polyphony was a hallmark of Renaissance music and allowed for a richer and more intricate texture than the monophonic chants that preceded this era. Palestrina's music, particularly, is renowned for its smooth, flowing lines and careful attention to the clarity of the text.
In addition to the polyphonic texture, there is a focus on the consonant intervals such as thirds, which began to be embraced during this period. The voices strive for smoothness, with a careful balance and blend that creates a serene and prayerful atmosphere. This was a shift from the more dissonant medieval sounds and was achieved through the careful writing of each individual voice part to contribute to the overall harmonious setting.
The entrance of the voices in Palestrina's mass exemplifies the mastery of counterpoint that was developed during the Renaissance, with each voice retaining an individual melodic line while also harmonizing with the others. This texture is crucial in creating the spiritual and uplifting effect Palestrina's works are known for.