Re: Updated nwc-conv for 2.75 with UTF8 support? Pv gs500 usb driver for mac. The nwc-conv tool is nothing but a front-end for the NWC2 program. Version 2.75 exports MIDI text as utf-8, which is probably causing your problem. Version 2.75a provides for ANSI text during MIDI export from the Tools, Options, File, ANSI text encoding option.