Patch I came up with to synthesize floor toms or other deep boomy rumbly drums like timpanis. Tweaking the Unison spread, square amount and frequency of the two modulator voices can get a wide range of sounds from boomy to metallic.

Intended to be played around C1.

To anyone who just copies the patch from the pic the one thing you can’t see is that the Fm Operators pitch is not connected to the Unison pitch but rather the rack pitch input. Oh and the modulator oscs are set to sync from the Unison gate.