Final answer:
Machaut's chanson "Ma fin est mon commencement" is written in a major key, has a polyphonic texture, a circular structure, a secular theme, and strophic form, but does not have a monophonic texture or use of medieval instruments.
Step-by-step explanation:
The chanson "Ma fin est mon commencement" by Machaut has a circular structure, a secular theme, and a strophic form. It does not have a monophonic texture or use of medieval instruments.
The chanson is in a major key and has a poyphonic texture, meaning it has multiple independent voices. These voices create a rich and complex sound.
The circular structure refers to the repetition of musical material, creating a sense of unity and completeness.
The chanson has a secular theme, which means it is not religious in nature. Instead, it likely focuses on topics such as love or courtly life. Additionally, it has a strophic form, which means that the same music is used for each stanza of the text.