Synthetic Sound Labs Model 2140 - ThunDrum

EURORACK MODULE Boom, tong, boing, clank, ting.  From bass drums, toms, bongos, congas and tablas to finger cymbals, garbage pail lids, and yes, even cowbells. The ThunDrum 2140 is a flexible two oscillator FM percussive membrane / metal based drum voice in a 8 HP Eurorack module.  It’s larger cousin is our MU format 1140. We tried hundreds of modular patch variations to get to the best combination of simplicity and tonal versatility in a reasonably priced, compact and user-friendly format – And we think we’ve found it! The main Tone oscillator (VCO) has a linear control response and is adjustable from zero (not thru-zero) to several kilohertz, but the key to the 2140’s unique sound is its enveloped linear FM (frequency modulation). A secondary wide range “sine” FM oscillator output is routed thru an internal VCA (FM Amount).  As pre-patched, the modulation depth is controlled by the Envelope output.  This allows higher harmonic contents at the beginning attack of the envelope, which t