I was going to make some guitar cables and there is one thing on which I am not so sure about. If I have a double shielded cable (ordinary audio cable consisting of signal, shield 1, shield 2), where should I connect the shield 2 in the jack? Ground on both ends? Leave it floating or leave it floating on one end? Thanks kindly for all answers.
If you connect the outer shield to the inner shield, then you've defeated the purpose of using double shielded cable. If you don't care about double shielding and are just trying to wire up a cable, then you can just do that.
If you have some input where the sleeve contact is grounded and the ring contact is treated as a reverse polarity signal, then it makes sense to not connect the outer sleeve to the inner one, but you'd have to use TRS connectors to make it work and it would be better if the inner shield were just another wire instead of another shield.
I guess I can't figure out the purpose of double shielded cable when it comes to musical instruments.