Thank you for the replies.
@elecman14: the test will be done in a ESD controlled environment so that's ok.
@fourfathom: kinda what I was fearing - just to make sure I get it, here is an example with one of my test traces:
DAC output -> OpAmp -> trace -> audio connector
^-> trace along edge -> test connector
Yes one of my test traces is actually an audio signal - it is a headphones output though so I am not worried about the noise (it will need a sufficient amount before you can hear it). The other test traces are a mix of digital inputs and outputs (everything under 50kHz and with soft edges)
But back on what you said, if current flows from the opamp output to a pair of headphones, and nothing is connected on the test connector, most (all?) of the electrons will take the path of least resistance/impedance, which is the direct trace between Opamp and the audio connector, and not go through the trace along the edge, or did I get that wrong?
Thank you!