TonePad TS9 Schematic question - Nevermind- old PDF

[bwanasonic]

The TP schem has a 4k7 resistor in series with a .047uf cap from pin 2  to ground. Most other schems have this connected to the bias voltage. What basic electronic principle am I missing here? I really like FP's compact layout style, so I'd like to base my layout on his.

BTW- I was planning on using the the clipping section part values from the Landgraff:  1k / .22uf / 10k with a 1M drive pot. I have a vintage TS9, so I'm looking for something a little different.

thanks
Kerry M

<EDIT>
just realized I was using an old PDF!