Ivan Wyschnegradsky, Prelude No. 14, mm. 1-2 (complete)
In this example, the top staff shows the mode that Prelude No. 14 is based upon. I have placed stems on the pitches that make up the tonic tetrachord of this scale. The middle grand staff shows the actual piano music, and below that, I use an analytic sketch to show how the non-chord tones embellish the tonic tetrachord.