Modifiers matching voice:

• nonverbal,
• individual,
• political,
• modern,
• narrative,
• negative,
• logical,
• unique,
• instrumental,
• essential,
• male,
• important,
• basic,
• professional,
• intimate,
• animal,

Simple categories matching instrumental:

• group,
• voice,
• characteristic,
• ensemble,
• test,
• effect,
• trait,
• entity,
• song,
• grouping,
• genre,
• assembly,
• form,
• composition,
• music,
• combination,
• hardware,
• passage,
• investigation,
• product,
• part,
• sound,
• play,
• selection,
• analysis,
• artifact,
• accompaniment,
• track,
• quality,
• timbre,
• action,
• piece,
• activity,
• style,
• works,
• force,
• section,
• masterpiece,