Music Block

Music Blocks are objects that appear in Super Mario Maker, Super Mario Maker for Nintendo 3DS, and Super Mario Maker 2. They function identically to Note Blocks, the only difference being that, when an object falls on it, it will also play a short music note.

A Music Block can be placed by shaking a Note Block. The pitch of the note that is placed depends on the height: for example, a Music Block placed one block above the bottom of the level will play a low note, while placing it towards top of the level will play a high note. In addition to playing different pitches of notes, the instrumentation will also change depending on what falls onto it. Examples include Mario's sound being a steel drum, a Super Mushroom playing a chiptune, and a piano playing when a Goomba lands on one. Due to this functionality, users have created levels that play customized music using different objects falling onto them.

Super Mario Maker
There are a total of 41 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 - Steel drum
 * Yoshi - Synth trumpet
 * Yoshi Egg - Cowbell
 * Super Mushroom/Weird Mushroom - Chiptune
 * Fire Flower - Theremin
 * Super Star - Toy piano
 * 1-Up Mushroom - Effect synthesizer
 * Mystery Mushroom - Pipe organ
 * Coin - Sleigh bell
 * Buzzy Beetle/Buzzy Shell - Out-of-tune bell
 * Spiny/Spiny Shell - Trumpet
 * Vertical Trampoline - Cymbal
 * Horizontal Trampoline - Hi-hat
 * P Switch - Snare drum
 * POW Block* - Acoustic bass drum
 * Koopa Clown Car/Fire Koopa Clown Car - Unknown "techno" instrument
 * Goomba/Galoomba - Piano
 * Green Koopa Troopa - Wooden xylophone
 * Red Koopa Troopa - Steel xylophone
 * Green Beach Koopa - Bark
 * Red Beach Koopa - Meow
 * Piranha Plant/Jumping Piranha Plant - Plucked strings
 * Fire Piranha Plant - Violinocello
 * Bill Blaster - Bass drum
 * Cannon - Steelpan drum
 * Hammer Bro - Electric guitar
 * Sledge Bro - Bass staccato strings
 * Thwomp - Taiko drum
 * Skewer - Gong
 * Bowser* - Electric bass guitar
 * Bowser's fireball rain (Super Mario World) - Bagpipe
 * Bowser Jr. - Saxophone
 * Monty Mole - Sitar
 * Bob-omb - Orchestra hit
 * Spike Top - Harpsichord
 * Dry Bones - Flute
 * Magikoopa - Synth organ
 * Muncher - Electric piano
 * Wiggler - Church bell
 * Goomba's Shoe - Accordion (bass clef)
 * Empty Shoe* - Cowbell
 * Goomba's Stiletto* - Accordion (treble clef)
 * Chain Chomp - Keyboard organ
 * Chain Chomp's stake - Soft cowbell
 * Big Mushroom -

Super Mario Maker 2
While most sounds from Super Mario Maker return in the sequel, a total of 8 new sounds were added into the game. It should be noted, however, that objects exclusive to the Super Mario 3D World style do not have sounds, due to the fact that Music Blocks are absent in it. * signifies that the instrument is similar to that of another object, although the sound itself is distinguishable.
 * Superball Flower* - Pipe organ
 * Big Mushroom** - Shamisen
 * Goombrat/Goombud - Out of tune piano
 * Boom-Boom - Tuba
 * Icicle -
 * 10-Coin/30-Coin/50-Coin - Wind chime
 * Rotten Mushroom - Bass synthesizer
 * Dry Bones Shell - Flute (same as Dry Bones)
 * Twister -

** signifies the instrument was changed from the original Super Mario Maker.