[sdiy] Sonic qualities of parts..

[JH.]

Don't worry too much about caps.
They may make a difference, in some puristic High End audio reproduction 
gear. I have no doubt about it.  (though I don't consider myself an expert 
in this, either.)

But when you mangle a signal with BBD delays, I doubt you will notice much 
difference from the capacitor type, unless you have an extemely bad and 
microphonic ceramic cap.

JH.



----- Original Message ----- 
From: "Robert Lorentz" <robert.lorentz at gmail.com>
To: "synth DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, September 16, 2008 9:50 PM
Subject: [sdiy] Sonic qualities of parts..


> I'm sourcing parts out for the JH String Filter and was intending to
> use the WIMA polyester film caps recommended by his BOM.  Sourcing
> from Mouser, I found these caps in some of the values required, but
> many weren't available.  Browsing around I noticed a similar boxed
> capacitor from AVX (metallized polyester film) that is available in
> every value required.
>
> Instead of mixing caps, I thought it best to stick with the AVX that
> are available through all values that I need.  They're also about 1/3
> the cost.
>
> This brought me to consider how it's often stated that certain caps
> are higher "audio quality" than others.  I understand that different
> materials and construction techniques result in different
> characteristics of a capacitor, but how do these differences translate
> in to real, tangible, and measurable, differences in audio circuitry?
> And to what degree does it actually matter?  Sure it feels good to
> throw the most expensive capacitor with a 400volt rating in to every
> Cxx spot on a board, but is this achieving any meaningful results?
>
>
> I started my audio adventure in the domain of guitar
> amplifications/effects and these "quality" statements regarding caps
> (et al) were thrown about *extremely* loosely.  Whether the statements
> are accurate or not, the people stating them to me certainly didn't
> know any tangible details... I peg the group here as a much more
> scientific bunch that won't see this email as heresy
>
> Robert
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