Pitching a sampled 909 snare down a couple of semitones gives a darker, grainier texture
On real 909 hardware you tune the snare in real time, but when working from samples you don’t have that control. Pitching the snare sample down a couple of semitones instead gives a darker, grainier sound than tuning would, because it lowers the perceived drum-skin tension and slightly degrades the transient. Rolling off the high end reinforces the less hi-fi quality. Combined with analogue-style saturation, this turns a clean 909 snare into the raw, mid-forward snare of classic Motor City records.
Examples
Take a 909 snare sample, pitch it down ~2 semitones in the sampler, add analogue saturation at moderate drive, then cut the top end for a less hi-fi feel. A/B against the clean sample to hear the character shift.
Assessment
State the pitch adjustment applied to a sampled Detroit techno snare and the perceptual effect it creates, and name one further move that reinforces the lo-fi character.