'pure data' means pure data vanilla or pure data extended. it excludes the use of any other sound processing application to make or sequence sounds, and excludes the use of VST, ladspa, audio unit etc plugins within pure data itself. triggering and controlling sounds with external hardware such as midi knobs and faders, arduino, etc, is totally fine. using an audio editor to record and do simple edits (crop, normalize, etc) of pd material is also fine, as long as the sound is not resequenced and no effects are added.
basically the sound needs to start and end in pd. this doesn't mean it all has to happen realtime. i have been having lots of fun lately with running sampled pd sounds through various sampling devices and effects)
my goal at the moment is to make some 'sample packs' of pure pd sounds which i will then release here and in other places under the creative commons license, so any submissions would need to be covered by an equally free agreement.
after that, what i do with those samples, and what anyone else does with those samples is up to us, and would be covered by creative commons. my final goal is to make an album worth of music and sounds using only pure data,
i can be contacted by email at email@example.com