An homage to the iconic Sequential Circuits Pro-One the PRO-1 Semi-Modular Analog Synthesizer from Behringer is a versatile musical instrument that offers a plethora of sound creation possibilities. This synthesizer which debuted in 1981 quickly became the go-to choice for artists like Thompson Twins Depeche Mode and Prince among others. The PRO-1 synthesizer is designed with a pure analog signal path and dual Voltage Controlled Oscillators (VCOs) that offer three selectable waveforms. This combined with its highly flexible Voltage Controlled Filter (VCF) and Voltage Controlled Amplifier (VCA) filters allows you to recreate the classic sound performance with ease and finesse. This synthesizer is equipped with a 3340 Oscillator that provides up to three simultaneous waveforms with a selectable range of four octaves. The VCOs can be modulated via the envelope or the low-frequency oscillator (LFO) offering enhanced performance. The mixer section balances the levels of the internal VCOs and noise generator providing you with the flexibility to unleash your creativity. At the heart of the PRO-1 s sound is its classic 4-pole filter which allows you to experiment freely with the Cutoff Frequency Resonance and Envelope. It also features a full complement of ADSR (Attack Decay Sustain Release) controls to help you dial in the perfect sound. Although the PRO-1 is a monophonic instrument its 16-note Poly Chain function allows you to combine multiple synthesizers for up to 16-voice polyphony. This synthesizer is also Eurorack ready making it perfect for integration into your existing system. The PRO-1 comes with a semi-modular architecture and default signal routing that allows you to create amazing sounds without lifting a single patch cable. It also features two separate envelope generators for modulating the VCF and VCA a dual 64-note sequencer and an onboard arpeggiator. The PRO-1 s dedicated and fully-analog LFO lets you choose from triangle pulse or square waveforms. The onboard Modulation matrix allows you to set the amount of Filter Envelope Oscillator B and LFO modulation applied to the signal. With 56 controls laid out in a highly-intuitive format the PRO-1 puts the joy back into music creation. Whether you re looking to recreate the classic sounds of the 1980s and 90s or design original sounds that will make you a legend in your own right the Behringer PRO-1 Semi-Modular Analog Synthesizer is the perfect instrument to give your imagination its voice.