C:\audio\pd\bin>pd -help
usage: pd [-flags] [file]...

audio configuration flags:
-r <n>           -- specify sample rate
-inchannels <n>  -- number of audio input channels
-outchannels <n> -- number of audio output channels
-audiobuf <n>    -- specify size of audio buffer in msec
-sleepgrain <n>  -- specify number of milliseconds to sleep when idle
-nodac           -- suppress audio output
-noadc           -- suppress audio input
-nosound         -- suppress audio input and output
-soundindev ...  -- sound in device list (counting from 0); e.g., "1,0" for second and first
-soundoutdev ... -- sound out device list, same as above
-listdev          -- list audio and MIDI devices
-resync           -- resynchronize audio (default if more than 2 channels)
-noresync         -- never resynchronize audio I/O (default for stereo)
-asio             -- use ASIO audio driver (and not the 'MMIO' default)

MIDI configuration flags:
-midiindev ...   -- midi in device list; e.g., "1,3" for first and third
-midioutdev ...  -- midi out device list, same format
-nomidiin        -- suppress MIDI input
-nomidiout       -- suppress MIDI output
-nomidi          -- suppress MIDI input and output

general flags:
-path <path>     -- add to file search path
-open <file>     -- open file(s) on startup
-lib <file>      -- load object library(s)
-font <n>        -- specify default font size in points
-verbose         -- extra printout on startup and when searching for files
-d <n>           -- specify debug level
-noloadbang      -- suppress all loadbangs
-nogui           -- suppress starting the GUI
-guicmd "cmd..." -- substitute another GUI program (e.g., rsh)
-send "msg..."   -- send a message at startup (after patches are loaded)