Is the sonata-allegro form still being used today?

Yes, it's used by composers who write in the classical form.

http://www.music.vt.edu/musicdictionary/texts/Sonata-allegroform.html

Yes, the sonata-allegro form is still being used in classical music today. While it originated in the 18th century, it continues to be a popular and widely used form in many genres of music, including orchestral works, chamber music, and even some contemporary compositions. While composers may adapt and modify the form to suit their own creative needs, the fundamental principles of the sonata-allegro form are still employed by many composers in their compositions.

Yes, the sonata-allegro form is still being used in contemporary music, although it may be adapted and expanded upon in various ways. To determine whether a specific composition uses the sonata-allegro form, you can follow these steps:

1. Familiarize yourself with the characteristics of the sonata-allegro form:
- The form typically consists of three main sections: the exposition, development, and recapitulation.
- The exposition presents the main musical ideas, often in contrasting keys.
- The development section explores and develops the material presented in the exposition, often through modulation and elaboration.
- The recapitulation restates the material from the exposition, usually in the original key.

2. Listen to the composition in question and identify the structural organization:
- Listen for the presentation of a primary theme(s) in the beginning.
- Pay attention to any contrasting themes or sections.
- Observe if there is a section that explores and develops the material presented earlier.
- Finally, notice if there is a restatement of the earlier material from the exposition.

3. Analyze the composition if needed:
- If you're familiar with music theory, you can analyze the harmony, key changes, and structural elements to confirm if it follows the sonata-allegro form.
- Look for specific markers, such as thematic transformations, modulations, or the repetition of earlier material.

By following these steps, you can assess whether a composition utilizes the sonata-allegro form in a contemporary context. However, keep in mind that composers often adapt and modify traditional forms to suit their artistic intentions, so the use of this form may vary across different musical styles and genres.