| Singular | Plural | |
|---|---|---|
| Nominativ | instrumentom, instrumentum | instrumenta, instrumentasua |
| Genitiv | instrumenti | instrumentorum |
| Dativ | instrumento | instrumentis |
| Akkusativ | instrumentum | instrumentasua, instrumenta |
| Ablativ | instrumento | instrumentis |
| Vokativ | instrumentum | instrumenta, instrumentasua |