Does playing magical music count as casting a spell?

So in DnD 5e, my bard character happened upon some fragments of a musical composition. When my character tried playing it, it caused some sonic-charged magical effect.

My question is–specifically in the context of conditions like Invisibility where when casting a spell or making an attack drops the Invisibility–does playing this particular piece of music, that happens to have a magical effect, count as casting a spell or making an attack?

Music symbols in Excel software

https://www.google.com/search?q=music+notes+symbols+and+names&prmd=isvn&sxsrf=ALeKk014o9KmAlDHaO3RfEyKUv6IyL2AJw:1598368052273&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi1kuf_0LbrAhXXyTgGHbT8B2UQ_AUoAXoECA4QAQ&cshid=1598368852656&biw=360&bih=592

https://en.wikipedia.org/wiki/List_of_musical_symbols

A Complete Guide to Chord Symbols in Music

https://en.wikipedia.org/wiki/Function_(music)

Can we store music symbols in Excel worksheet ?.

If yes, what will be the data types for storing music symbols in cells?

Can we write functions or formulas for analysing Music symbols stored as Excel data?

Ventriloquism and Bardic Music

Suppose a bard is trying to remain invisible while still inspiring companions. If the bard starts singing, they make themselves a target. If the bard uses Ventriloquism, they can potentially make noise without drawing attention to their actual location. However, this means their allies will be listening to a figment, not the actual bard, so bardic music fails.

What happens if the party makes the save vs ventriloquism? Now, they know the spell voice is fake. Does that mean they hear the real voice? Would they be able to hear the bard singing for real? Or does the ventriloquism spell still block the bard’s actual voice?

From the Ventriloquism spell in the SRD:

With respect to such voices and sounds, anyone who hears the sound and rolls a successful save recognizes it as illusory (but still hears it).

This does not state the original voice could not be heard. Nor does it state that it could. Typically, with spell descriptions, it does not grant anything it does not say it grants, but nowhere does it say the original voice is gone…

From the description of "Saving throws and Illusions (Disbelief)" in the SRD:

A successful saving throw against an illusion reveals it to be false, but a figment or phantasm remains as a translucent outline.

This only discusses visual illusions. It does not mention whether or not the original image is visible when an illusion is defeated.

So, back to my original question: would a party member who made the save against ventriloquism receive the benefit from the Inspire Courage?

Note: I recognize an easier method is using the Message spell, but my group is trying to determine the limits of Ventriloquism and how it interacts with other magic.

Can musical instruments under the effect of Animate Objects be used to make music?

Can Animate Objects be used to make musical instruments produce that instrument’s music?

The spell’s description is a bit vague as to how much control you have over animated objects for non-combat purposes.

Wind instruments probably wouldn’t work but I’d assume mechanical instruments could work, such as accordions or drums.

[ Other – Music ] Open Question : What are some of your favorite Christmas songs (Who song by who)?

For example: IMO, mine is This Christmas by Donny Hathaway. My Honorable Mention favorite is: Let it Snow by Boyz II Men, I’m Dreaming of the White Christmas by The Drifters, Rocking Around the Christmas Tree by Brenda Lee, Santa Claus is Coming to Town by The Jackson 5, Sleigh Ride by TLC, Slient Night by The Temptations, Back Door Santa by Clarence Carter, Jingle Bell Rock by Bobby Helms, All Alone for Christmas by Darlene Love, Christmas in Hollis by Run-DMC, The Christmas Song by Nat King Cole, Rudolph the Red Nosed Reindeer by The Temptations; Let It Snow! Let It Snow! Let It Snow! by Vaughn Monroe, and All I Want For Christmas is You by Mariah Carey

New interesting music software for content creators

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