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  1. Hi everybody, After have build SEQ v4 with STM32F1 with options (ethernet / 4x IIC midi / AOUT/ BLM port) no wilba CS/ homemade frontpanel (lots of DIN DOUT) some years ago... (and working very well) I'm building a new SEQ V4 with STM32F4 and Wilba CS/schaeffer frontpanel with: Line Driver transmetter 2x MIDI IO IIC Midi ethernet card from the fist seq BLM port a separate rack with Line Driver receiver ,AOUT and DOUTx4 for gates/triggers Questions: I don't find informations for the BLM port with STM32F4! someone say on a forum that the second MIDI IO will be for this purpose: what is the best way to have BLM port with STM32F4? how to wire? Is MIDI IO with STM32F4 provide 3V or 5V midi ? (does the MIDI IO stuffed with 220 ohms or 47 ohms resistors R3 R5 R8 R10?) Is the config of LineDriver is Plug n' Play? you could use the seq without Line Driver receiver or have to plug parallel port permanently? Thanks