sentences:  This is the approach used on Sammich MIDIBox SID  and Sammich MIDIBox FM.These two kits contain the original MBHP design, but with a simplified PCB, dedicated to the connection with a SID chip or a YMF262 chip.In the case of the STM32F407 MBHP, the CPU is mounted on a module used as a daughterboard, made by ST and sold as a development board (called STM32F4 Discovery by ST).