a musical instrument: accordion, sits on alone on stage ready to play, under a strong single spotlight

keys bass treble reeds notes chord button casing key tops mechanism blocks plates valves register switches slide corners curtain spotlight microphone stage lights backdrop props room manager rehearsal chair soundboard orchestra pit wings system crew sheet blocking entrances exits intermission applause standing ovation encore conductor musicians stagehands lighting technician sound engineer mirror entrance trapdoor risers floor prompter39aph39s box scrim proscenium arch balcony aisle theater seats office ushers playbill program lobby marquee ticket booth red carpet velvet footlights extension door rail