[sdiy] On shielded cable (or not) for audio

[Mike Gorman]

Aaron,

I tend to use twisted pair for CV signals then screened for Audio, just as a
convention I've adopted. It fits with my methodology (audio is sensitive to
noise) and it doesn't do any harm.

I suspect that with the high signal strengths you get in synth's though, it
isn't such a big issue. When you are talking volts rather than millivolts
for analogue signals, the signals are much less susceptible to external
influence. 

Even with Banana's, as long as the shield is grounded at one end, the signal
is shielded, so you can still use shielded cable if you wish.

Regards

Mike Gorman

-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Aaron Lanterman
Sent: 03 July 2009 23:33
To: synth diy
Subject: [sdiy] On shielded cable (or not) for audio

I've been going through google images looking at the insides of  
people's modulars to get mounting ideas.

I noticed that when running to audio jacks, some folks (like Paul S.)  
(a) use shielded coax-like cable. Others (b) just use a couple of  
wires and twist them.

Thoughts on when (a) is essential (or equivalently, when you can get  
away with (b))?

On pure banana synths I guess you're always in (b) mode anyway.  
Although, Iuppose you could run the shield out to the jack and just  
not connect it there and only have the connection on the board.

In the case of (a) does anyone have a favorite part number?

- Aaron
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