If you are using a hardware MIDI synth, in other words, if you are not using a DXi/VSTi based software MIDI synth, the automatic "Render" function cannot work. That is because the MIDI sounds of a hardware synth are outside the domain of the host cpu. The only way to get a full .wav or .mp3 or other audio format file of that is to play back the performance from start to finish while recording it using a recording program.


--Mac