Vintage Synth Repair

Do these caps wear out if the synth is not used? I have a synth that 
hasn't been played for 20+ years, just wondering if that would 
benefit from replacements. (It has a new power supply).--- In 
vintagesynthrepair@yahoogroups.com, "gil_we" <gil_we@...> wrote:
>
> Thanks,
> 
> I'm referring to electrolytics only.
> 
> 
> --- In vintagesynthrepair@yahoogroups.com, "Antoine Deschênes"
> <antdes45@> wrote:
> >
> > In power supplies, I'd recommend Nichicon HE/UHE caps, their MTBF 
is
> > much longer than most capacitors. In the signal path, people 
recommend
> > poly#### film capacitors to replace electrolytics, since they're
> > non-polarized and have always good characteristics for audio. You
> > simply eliminate the need to look through tons of different types 
of
> > capactiors, there are no bad sounding film caps. There are two 
common
> > types, polypropylene and polyester. Polypropylenes are said to 
sound
> > better, but they start failing after 20-25 years. Polyesters don't
> > have this problem.
> > 
> > 2008/4/13, gil_we <gil_we@>:
> > > I've been so far done recapping of mainly power supply, in 
analog
> > >  synthesizers. I'm no willing to start doing a full recap for a 
few
> > >  synths, and need to pick up the best make of caps for that 
purpose.
> > >
> > >  Most important is, of course, sound ! I had a bad experience
> recapping
> > >  an old stereo amplifier with modern makes of caps, and noticed 
some
> > >  change in sound, in a bad way (it sounded thinner once I 
recapped).
> > >
> > >  Any suggestions ?
> > >
> > >
> > >  ------------------------------------
> > >
> > >  Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > 
> > 
> > -- 
> > Antoine Deschênes
> >
>