Find the name, term or phrase for the presented technique, instrument or notation. Please note that questions about identifying chords, notes, key and time signatures are off-topic.
Tag questions, where the appropriate term is not known and therefore no internet search can be performed. This is typically done for exotic notation, vocal or instrumental techniques heard from a recording or identifying instruments from a picture.
Note, that questions of the form "Which piece is this?" are out of topic and should be asked at our sister site Music Fans instead.