Here is the full list of all 28 One Hand Clapping achievements.
Return to Silent City
Find the Silent City: Reprise glyph
Sail through Solo Sea
Find the Solo Sea glyph
Descend Coda Cave
Complete the World Tree canopy Call and Response with high accuracy
Find the Coda Cave glyph
Wander Fugue Forest
Complete the World Tree trunk Call and Response with high accuracy
Find the Fugue Forest glyph
Complete the Bad Apple section without any errors
Complete the Lullaby Call and Response with high accuracy
Climb Maestro Mountain
Look out from the Mountain peak for 15 seconds
Complete the Rhythm Temple without any errors
Complete the Rhythm Village without any errors
Activate the hidden sample machines in the Rhythm Village
Find the Maestro Mountain glyph
Activate the hidden cave in the Tempo Drum section
Traverse Duet Desert
Complete the Weefox Call and Response with high accuracy
Complete the Nest Call and Response with high accuracy
Find the Weefox under the waterfall
Complete the Bell Shrine without any errors
Find the Duet Desert glyph
Hug the Melody Hermit for 15 seconds
Escape Silent City
Find the Silent City glyph