@whale-av said:

Have you turned on DSP in the terminal (pd main window)?
David.

Thanks for the reply.
I did turn on the DSP, I can hear the wave being produced too, just the filter is not being displayed in the graph. Is there any extra code I need to add, or do I just need to name the array lop_display like in the example?

I am new to PD, and currently working through the examples at the floss guide. In the filter section (here: http://en.flossmanuals.net/pure-data/audio-tutorials/filters/) They've displayed the filters in a graph, but I cant get it to work for me.
I'm running windows 8 if that makes a difference.
If anyone could help out a noob I'd appreciate it