I have installed Pd version 0.38.4-extended-RC8 on my
windows xp system. I used pd-settings.reg to load all
external libraries.

I am willing to run the musical keyboard using web cam
application using PD. This is a Keyboard with only 4
keys. when you move your fingers in front of the web
cam above a key then the corresponding note is played.
I have downloaded the PD files from the web site
http://publicaccess.azylum.net/archives/144

I am not been able to get the desired output.
My web cam is working fine with Pd. I tested it by
opening pix_video.pd.

error i get is

error: pix_videoDS: Could not add the filters to the graph, hr 0x80004003
opened device 500

* OSC-route: float arguments are not OK.
OSCroute $1
... couldn't create

http://www.pdpatchrepo.info/hurleur/Theremin.pd

That looks like the patch needs to be given a creation argument, which means it is an abstraction and not a standalone patch.

The OSCroute error is because it needs a symbol argument like [OSCroute /foo] or [OSCroute /bar]. $1 is the first argument of a patch like [blah X Y Z], here $1 would be X, $2 would be Y, etc. So you need to create [blah /foo] or [blah /bar] instead of [blah] or [blah 57].

Hi
How to create [blah /foo] or [blah /bar] instead of [blah] or [blah 57]. I am new to PD. Kindly give me help in detail.