"Full instrumentation" means that all the different musical instruments that are typically used in a piece of music are being played or recorded. Full definition
1961 Chevrolet Corvette Convertible 350 Hi - Performance V - 8 Engine 4 - Speed Manual Transmission Red & White Exterior Over Red Interior Full Instrumentation Including Tach Removable Hard Top Included Spinner Style Factory Wheel Covers Last Year of Two Tone Painted Coves Radial White Wall Tires Frame Off Restoration (classiccars.com)