Sorry, late to the show on this post, but I do know that Pianoteq can be invoked from the command line or terminal, and there are a few options available.
Example (on my mac):
$ /Applications/Pianoteq.app/Contents/MacOS/Pianoteq --help
Pianoteq version 3.6.0/20100324 -- http://www.pianoteq.com
Copyright (c) 2010 Modartt.
Options from command-line:
--no-prefs : start Pianoteq without using any saved preference
--no-audio-prefs : start Pianoteq with a clean audio/midi configuration
--prefs FILENAME : stores the preferences in the specified file
--fxp FILENAME : load an FXP file on startup
--preset NAME : load a preset on startup
--midi FILENAME : load a midi file
--wav FILENAME : export midi file as wav, and quit
--rate FREQ : change the sample rate for the exported wav
--mono : export the wav file as mono
--headless : do not show up the graphical interface
Example of use: Pianoteq --preset "M3 Close Mic" --midi foo.mid --wav foo.wav
(Yes, a rather old version of PTQ on this computer, but I'm sure 3.6.7 is the same.)
As you can see, you can have Pianoteq load a MIDI file and preset, and render a WAV file automatically. Using a simple bash or batch script, you could repeat this for all your MIDI files, then use some kind of batch conversion utility to convert the WAV files into MP3 files.
Last edited by JerryKnight (26-10-2011 22:37)