After investigating the possibility of using SW UART for MIDI out, I decided to give up... I had lots of issues getting reliable serial baudrate conversion and did not have enough spare time to investigate further, as can be seen based on my lack of posts in the last few months. So I am now using HW UART, 31250 in, 31250 out... no conversions... and that seems to be working fine. Took me some time to actually get it right, I thought I was also loosing bits there, until I found out about the running status in Midi... dammed it.. should have read the midi specs!!!
On the Raspi side, I plan to do as explained here to get the serial port to work at 31250.
