Resistor and cap type,audible diference?

[Aharon]

Have you found that using all 1% resistors and "quality" caps makes and audible diference in your projects?
Thanks
Aharon.

[markm]

I don't, others do.
Try it! 

[JimRayden]

Me neither, but I haven't done a proper a/b test yet.

---------
Jimbo

[RaceDriver205]

If you remove the antenna from your car, you'll get better acceleration 

[aron]

Do a test with capacitors. First try all of a certain type (ceramics for example), then try all film capacitors and make your own decision. Measure your capacitor values and try and get them as close as possible when doing the test.

[Paul Perry (Frostwave)]

If there is a difference, it will depend very much on where the component is, in a particular circuit.
What I mean is, there are certain points in certain circuits where the various imperfections of components - and no component is 'ideal' - may matter.

[MKB]

In my experience, the simpler a circuit is, the bigger difference a particular capacitor dielectric or resistor type makes.  One of the things you pay for when you buy a Fulltone or Z. Vex effect is the careful optimization of component types.  In one Fulltone pedal (a well known modification of a Voodoo labs Overdrive pedal), some of the magic is in the use of "lower quality" dielectric ceramic and tantalum signal caps, the same pedal with different part types (i.e. say mylar or polypropylene film) caps in the same locations will sound different, and not as good.  Although changing the part construction is mostly in the last 10% or so of tweaking.  Fuller took a mediocre pedal, tweaked and modified it a bit, and made it exceptional; and part of this magic was good ears working with part types.

So, working with resistor types and capacitor formulations is another parameter you can tweak in order to get the sound you want.  It should not be ignored as it does make a difference.  But "better", i.e. more high tech and expensive, does not necessarily mean better tone.

[R.G.]

Also, run - do not walk - away from anyone who is trying to sell you something that sounds magically better because it uses solid-gold/vintage/pure/yada/yada parts.

In my prior job, we referred to this kind of thing as an intelligence test.

[petemoore]

  Here's some...application recommendations...
  Before buying expensive fancies for SB usages...
  To sort of illustrate what the order of buying 'fancies' might be
  'excellent' cables for the signal path connections?
  What is the source [quality Magnetic pickup?]?
  ____________
  *except for 'brownie wafer' capacitors...I don't use, and believe the mojo tales on the subject [testing was done]...
  ____________
  It's the entire chain. It is a chain, if it works as a chain.
  how strong is the chain? As strong as the weakest link.
  For 'extreme strength' testing of a link in a chain, every other link must be...extremely strong.
  That said, all the modern board components tested are..very very strong, I can't say the same for cables, I don't know the strength of each link you are using.
 
   

[Aharon]

Also, run - do not walk - away from anyone who is trying to sell you something that sounds magically better because it uses solid-gold/vintage/pure/yada/yada parts.

In my prior job, we referred to this kind of thing as an intelligence test.

I'm aware of that but I was talking more like plate resistors in tube amps where carbon comps are noisier than metal or 1/2 watts having more residual (shot?)noise than 1W.........along those lines,not audiofool crap,I'm talking stuff that you can actually measure.

[mac]

Talking about pedals, I can't find any difference between std resistors and metal films, ie, rangemaster. But I hear differences between ceramic, poly and electro caps; but some say this could be because of the deviation from the supposed value. I do not have a capacitor tester, but in every project I breadboard it is always the same tonal change...

mac

[dxm1]

I don't know why, but I have found that using polystyrene caps for the 470pF C5 in the BSIAB2 _does_ make an audible difference. I've made about a half dozen of these as gifts for friends, and all agree that at gig volumes, units with these caps sound "better". I can't hear the difference at bench levels, but I trust the ears of others. So far, everyone has returned their unit for this "upgrade". Foolish mojo? I dunno...

[mac]

I hear the difference at room levels.

If you breadboard a fuzz face with a 2.2uf poly, ceramics, tantalum and electro, and put a switch to quickly swap the caps you'll hear how different they sound even with a ss amp at low volumes.  A good amp will make it more noticeable.
Sometime ago, to be sure that I was not sensing deviations due to tolerance, I put a 2.2uf poly and bought a dozen of 2.2uf electros and even 3.3uf and 1uf, just to statistically compensate. Even the 3.3uf nor 2 or 3 parallel 1uf sounded as good as the poly. My mother who is 74, supposidly some ear loss, could hear the difference as well. She does not like electros... and if "la mamma" says so, it's ok for me 

mac

[R.G.]

Remember that electros may have tolerances of +80%, -20%. You really can't flip electros in and expect them to statistically average.

You simply must measure the capacitances and do a blind test to see if you can even guess when the capacitors have changed, let alone which is better at a rate better than random guessing. Humans are BAD at being impartial, even with themselves.

[mac]

Remember that electros may have tolerances of +80%, -20%. You really can't flip electros in and expect them to statistically average.
You simply must measure the capacitances and do a blind test to see if you can even guess when the capacitors have changed, let alone which is better at a rate better than random guessing. Humans are BAD at being impartial, even with themselves.

Yes, I'm aware of all that, that's why I tried with different 3.3uf. In the absence of a cap meter it may give a hint. I should have said "statistically". 
And more, sometimes one can have some prejudice about electros that can make ourselves be certain that they are terrible caps. And I guess that this is my case. Guilty as charged. Electros suffer from aging, bad high frew response...
The best way to do a test is like you said, measuring the caps. And let someone change the caps while you're playing. And do not spend a lot of time to decide because of ear fatigue.
And who made the cap also matters.

How can I explain it better? A +/-100% tolerance of an electro will cause some increase/reduction in the bass response, always talking about the FF input cap. This will be the main effect. What I'm trying to describe is a change in the fuzziness at high drive levels. IMHO the polys makes the signal more crystal, more alive. Hard to find the words in english.

Anyway i'm going to buy a a cap meter... 

*****************

I've been reading  about caps, mainly dielectric properties and which cap fits in some projects and which not. But no one related to stompboxes and distorting a signal like we do.

RG, does the dielectric may/may not alter the signal to audible levels? What can you say about different dielectrics?
Is it possibly that when the voltage changes so fast, the induced polaritazion in the dielectric could react slow enough to be audible?

mac

[Gus]

Do what Aron posted and if you can record the results.

  Name the tracks something other than a,b,1,2,3 etc things like tree, cat, dog.  letters or numbers seem to "want" to be put in order IMO.

Let them sit a few days and let someone hear them (don't tell them what the test is about) and give their feedback

Caps are cheap.  Make up your own mind.

There is Physics behind some of the sound.

Go to the sencore site and download the PDF for the LC103 meter read the ceramic test section.

Some of us have been posting about caps in effects for years old ampage days.

[BMF Effects]

Resistors - One day I built three Red Llamas. One with carbon films, one with carbon comps and one with metal films. All resistors were measured within 2% of the required value. I could not hear an appreciable difference between the three in either tone or noise. I also built two LPB-1's, one with carbon comps and one with metal films. There's was a touch (almost imperceptible) more clarity and less noise in the metal film loaded one.

Capacitors - I prefer the brown Panasonic ECQ-B series caps over the Xicon/green chiclet ones. I think they sound a little warmer. I could also be hearing what I want to hear.

Electrolytics - Never compared brands so I can't comment. It never occurred to me to try. Electrolytics are electrolytics if you ask me.

[RaceDriver205]

Im sorry, Im holding this capacitor up to my ear and I can't hear anything 

[shadowmaster]

Eric Johnson can determine what type of battery is in his overdrive pedal just by the sound of it.

[BMF Effects]

Im sorry, Im holding this capacitor up to my ear and I can't hear anything 

Did you try the other ear?