pd -open d:/pdpatches/mypatch.pd -nogui
should do it .
take care of spaces in folder names , i used d:/pdpatches/ as an example.
W:\pd\bin>pd -h usage: pd [-flags] [file]...
audio configuration flags: -r <n> -- specify sample rate -audioindev ... -- audio in devices; e.g., "1,3" for first and third -audiooutdev ... -- audio out devices (same) -audiodev ... -- specify input and output together -inchannels ... -- audio input channels (by device, like "2" or "16,8") -outchannels ... -- number of audio out channels (same) -channels ... -- specify both input and output channels -audiobuf <n> -- specify size of audio buffer in msec -blocksize <n> -- specify audio I/O block size in sample frames -sleepgrain <n> -- specify number of milliseconds to sleep when idle -nodac -- suppress audio output -noadc -- suppress audio input -noaudio -- suppress audio input and output (-nosound is synonym) -listdev -- list audio and MIDI devices -asio -- use ASIO audio driver (via Portaudio) -pa -- synonym for -asio -mmio -- use MMIO audio API (default for Windows) (default audio API for this platform: MMIO)
MIDI configuration flags: -midiindev ... -- midi in device list; e.g., "1,3" for first and third -midioutdev ... -- midi out device list, same format -mididev ... -- specify -midioutdev and -midiindev together -nomidiin -- suppress MIDI input -nomidiout -- suppress MIDI output -nomidi -- suppress MIDI input and output
other flags: -path <path> -- add to file search path -nostdpath -- don't search standard ("extra") directory -stdpath -- search standard directory (true by default) -helppath <path> -- add to help file search path -open <file> -- open file(s) on startup -lib <file> -- load object library(s) -font-size <n> -- specify default font size in points -font-face <name> -- specify default font (default: Bitstream Vera Sans Mono) -font-weight <name>-- specify default font weight (normal or bold) -verbose -- extra printout on startup and when searching for files -version -- don't run Pd; just print out which version it is -d <n> -- specify debug level -noloadbang -- suppress all loadbangs -stderr -- send printout to standard error instead of GUI -nogui -- suppress starting the GUI -guiport <n> -- connect to pre-existing GUI over port <n> -guicmd "cmd..." -- start alternatve GUI program (e.g., remote via ssh) -send "msg..." -- send a message at startup, after patches are loaded -noprefs -- suppress loading preferences on startup -nosleep -- spin, don't sleep (may lower latency on multi-CPUs) -schedlib <file> -- plug in external scheduler -extraflags <s> -- string argument to send schedlib -batch -- run off-line as a batch process -autopatch -- enable auto-patching new from selected objects