Music Block

Music Blocks are objects that appear in Super Mario Maker, Super Mario Maker for Nintendo 3DS, and Super Mario Maker 2. They are derived from Note Blocks, and function identically, while also playing a short musical note when an object lands on it. A Music Block can be placed by shaking a Note Block in Super Mario Maker and Super Mario Maker for Nintendo 3DS, or by pressing and holding a Note Block and selecting the Music Block from the context menu, in Super Mario Maker 2.

The pitch of the note that is played depends on the Music Block's height: for example, a Music Block placed one block above the bottom of the level will play a low note, while placing it towards the top of the level will play a high note. In addition to playing different pitches of notes, the instrumentation varies depending on what object lands on the Music Block. For example, Mario's sound is a steel drum, a Super Mushroom's is a chiptune, and a Goomba's is a piano. Due to this functionality, users have created levels that drop different objects onto Music Blocks to play customized music.

Super Mario Maker
There are a total of 46 possible sounds that can be produced from Music Blocks in the original Super Mario Maker including alternate forms of select objects. * signifies that the instrument is similar to that of another object, although the sound itself is distinguishable.
 * Mario - Steelpan
 * Super Mushroom/Weird Mushroom - Square wave
 * Coin - Sleigh bell
 * Trampoline - Cymbal
 * Sideways Trampoline - Hi-hat
 * Goomba/Galoomba - Piano
 * Green Koopa Troopa/Green Shell - Xylophone
 * Green Beach Koopa - Bark
 * Red Koopa Troopa/Red Shell - Vibraphone
 * Red Beach Koopa - Meow
 * Piranha Plant/Jumping Piranha Plant - strings
 * Fire Piranha Plant - strings
 * Mystery Mushroom - Pipe organ
 * Big Mushroom - Shamisen
 * Spiny/Spiny Shell - Trumpet
 * Fire Flower - Piccolo
 * Super Star - Celesta
 * 1-Up Mushroom - Electric organ
 * Bill Blaster - Timpani
 * Buzzy Beetle/Buzzy Shell - Detuned bell
 * Hammer Bro - Electric guitar (lead)
 * Sledge Bro - Slap bass
 * Thwomp - Taiko drum
 * Skewer - Gong
 * Bowser* - Electric guitar (bass)
 * Bowser's fireball rain (Super Mario World) - Shanai
 * Bowser Jr. - Saxophone
 * Rocky Wrench - Acoustic guitar
 * Monty Mole - Dulcimer
 * Bob-omb - Orchestra hit
 * POW Block* - Bass drum
 * Cannon - Timbales drum
 * Spike Top - Harpsichord
 * Dry Bones - Flute
 * Magikoopa - Chorus
 * P Switch - Snare drum
 * Muncher - Electric piano (tines)
 * Wiggler/Angry Wiggler - Tubular bells
 * Goomba's Shoe - Accordion (bass clef)
 * Goomba's Stiletto* - Accordion (treble clef)
 * Empty Shoe/Empty Stiletto* - Temple block
 * Yoshi - Oboe
 * Yoshi's Egg - Cowbell
 * Koopa Clown Car/Fire Koopa Clown Car - Synth chord
 * Unchained Chomp - Electric piano (chorus)
 * Chain Chomp's post - Woodblock

Super Mario Maker 2
All sounds from Super Mario Maker return in the sequel, and a total of 25 new sounds are present.

Objects exclusive to the Super Mario 3D World style also do not have sounds, as Music Blocks are absent in this game style. Finally, the Super Leaf, Cape Feather, Propeller Mushroom, Power Balloon, Boo, Boo Buddies, and Lava Bubble do not have sounds, despite the fact that they can land on a Music Block if they are attached to a parachute. * signifies that the instrument is similar to that of another object, although the sound itself is distinguishable.
 * Luigi/Toad/Toadette/Link - Steelpan (shared with Mario)
 * 10-Coin/30-Coin/50-Coin - Windchimes
 * Master Sword - Synth brass
 * Link's Bombs - Chicken cluck
 * Superball Flower* - Pipe organ (shared with Mystery Mushroom from Super Mario Maker)
 * SMB2 Mushroom/Frog Suit/Super Acorn - Staccato strings
 * Rotten Mushroom - Synth bass
 * Goombrat/Goombud - Honky-tonk piano
 * Spike - Electric bass
 * Spike Ball - Tom-tom drum
 * Snowball - Synth tom-tom
 * Dry Bones Shell - Flute (shared with Dry Bones)
 * Pokey - Steel guitar
 * Snow Pokey - Bagpipe
 * Boom Boom - Tuba
 * Mechakoopa - Supersaw
 * Blasta Mechakoopa - Saw bass
 * Zappa Mechakoopa - Trance chord
 * Larry - Reverse piano note
 * Iggy - White noise buildup
 * Wendy - Flying saucer effect
 * Lemmy - Female voice saying "hello" (lower octaves), female voice saying "okay" (higher octaves)
 * Koopa ball - Voice saying "yay"
 * Roy - Descending fretted bass
 * Morton - Hit with chimes and low rumble
 * Ludwig - Gong buildup and crash
 * Icicle - Synth bell