I'm building a harmonic exciter (see attachment) as one of my uni projects and found a nice circuit diagram online for a Aphex Aural Exciter type B (essentially generates additional harmonic content to audio which improves clarity etc) that I want to build. Problem is there are bits on the diagram that's confusing me so any clarifications will be very helpful indeed.

My main confusion is with the two numbers next to the LM13700 chip pins (labeled 1/2 U303 on diagram). Do these mean both these pins are connected together OR I use just one of the pins? For example pins (5,12) & (7,10) are shown connected together to a resistor (51K) then to ground, can this be right?
I'm encountering the same problem with the other chip sets (TL072, labeled 1/2 U101~3)

Any help on this matter will be greatly appreciated!!

 

A link or the actual schematic would be helpful.

 

CRAP! I forgot my "hidden attachment viewing glasses" in my other pants.

 

Crap why didn't the attachment show? oh well... I reposted the attachment on original post

 

CRAP! I forgot my "hidden attachment viewing glasses" in my other pants.

Reposted with "visible" attachment!

 

The use of the 1/2 or 1/3 or 1/6 sometimes

usually indicates that the IC package contains 2 or 3 or 6 or the logic types shown. 2 op amps, or 2 NAND gates etc etc.

SEE THE DATASHEET for pin layouts.

 

Is it possible because the device (manufactured) is a 2-channel device (stereo) and the diagram I have only shows half (mono) that those two numbers next to chipsets indicate which half these pins belong to?

The device is a stereo audio effect (or 2 mono) I know it has to have identical circuitry if the device was to be used as stereo so does this mean 2 signals share the same chipsets but separate (duplicate) components (ie resistors, capacitors etc)?