Updated smnp.dsp (markdown)

smnp.dsp.md

@@ -2,6 +2,11 @@
 ## `plot(...signals: list<int, float>)`
 Plots given lists as individual signals.
 
+### Example
+```
+plot(fft(wave([@F#])));
+```
+
 ## `plot(config: map<string><>, ...signals: map<string><>)`
 Plots given signals using global config map and individual maps with series.