On 14/5/19 10:08 π.μ., Simon Iten wrote: > i think it boiled down to using Serial.write with an explicit byte statement > > Serial.write(byte(variable)); > > at least this works with all my midi gear here. what happens if you send 10 from the arduino? do you also get a 10 in pd? Doesn't work here, still get 10 instead of 13.