The Buchla Easel Command USB MIDI Host Expansion Card is an add-on module designed specifically for the Buchla Easel Command analogue synthesizer. Its straightforward installation process seamlessly integrates USB host capabilities into the instrument. This advancement enables direct connections between USB keyboards (featuring USB-B connectors) and the Easel Command, eliminating the need for intermediary devices like computers or specialized interfaces. The connected USB MIDI device must adhere to the class-compliant standard to ensure compatibility and hassle-free operation.