The noun 'ragtime' is a common noun, a general word for a style of music.
A proper noun is the name of a specific person, place, or thing; for example, the song "Ragtime Cowboy Joe" (c.1912) or the movie "Ragtime" (1981).
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
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common
It is a proper noun, because it is the name of a specific thing.
Some common ragtime chord progressions used in traditional ragtime music include the I-IV-V7-I progression, the I-V7-I-IV progression, and the I-IV-I-V7 progression. These progressions help create the characteristic syncopated and lively sound of ragtime music.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
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Ragtime MUSIC. :)
Ragtime - I - was created in 1960.
The name ragtime came from the syncopated, or "ragged" rhythms that occur in ragtime music.
Ragtime.
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Ragtime - musical - was created in 1998.
Ragtime - novel - was created in 1975.
The Ragtime Dance was created in 1902.