I just got an IPHONE 4 and while perusing some apps noticed that Peterson had one the emulates their long produced strobe tuner. I liked the fact that it was accurate to 1/10 cent (.001 semitone), cool. Peterson has a great reputation for tuning machines going back 60 years.

Anyway, I had a chance to talk with several of their Engineers on some esoteric topics.....

Since Fretted instruments use just or equal temperment, someone who has a sensitive ear routinely detunes certain strings to remove some of the enharmonicities that come out when you play chords. Typically certain harmonics are particulary troublesome since played as part of the chord the harmonic series of the individual notes clash and cause beating (this is what piano tuner use to tune intervals-they traditionally count beats). This beating is produced when the frequency between the harmonics and fundamentals are close enough to hear the beats (The beat frequency is the diffence in Hz between the note serie). If you listen you can pick up the anoying undertones.when

Anyway, Peterson is a bit anal about the whole issue so they produce all their tuners to 1/10 cent and incorparte in their more expensive tuners what they call sweeteners. The sweeteners adjust the "perfect" number derived mathematically to produce sweater sounds. For a banjo they suggested that the 2nd string should be flattend by about 6.5 cents to produce a more pleasing sound. Guitars and other instruments have a whole other series of sweateners derived by exerience and judegement. After all the physics goes out the window when we consider that we are using human ears and aesthetics.

According to Peterson they are working with James Taylor and other artists to incorporate and determine the most appropriate sweeteners.

For those of us that have trouble just playing the correct notes this obviously represents a level of attention that is academic for us but it is interesting to know that accomplished musicians worry about this issue to optimize their sound. Petersons, Strobo-clip has selectable sweeteners for a variety of instruments. No wonder is costs $69 instead of the normal cost for a tuner.

From a marketing and sales standpoint different Tuner manufactures can either appeal to the precision minded or the "keep it simple stupid crowd."

BTW, keyboard instruments don't have this issue since they use the tempered scale. (Tuning between songs with a keyboard just isn't that easy). But piano tuning really is a combining of physics, art and aural sensitivity.

Probably more info than most of you needed but I think it is interesting. Like all things the important thing is to play and make music. You can wake up now.

That's amazing. I always suspected that the top artists used some sort of fine-tuning on their instruments that the rest of us didn't have. Now I know. Thanks, very cool info.

Interesting article about tuning.

I am a supporter of the KISS principle in using tuners - everybody is on the same level playing field when we start - and if not - it's easy to tune up - just pick up your tuner and in 2 minutes - you're done!
I think back - wayyy back!! - to the times when we had no tuners. We would take forever to get ourselves together -in tune!

But I believe I understand the concept of the 'sweetener' -a great idea - but I'm not sure everyone perceives the same 'sweet spot' musically. I always recall tuning my Simon & Patrick (acoustic steel string) - I would set the Bass E string just a tad higher than the tuner indicated -- just because I liked the way it sounded. My buddy would come along - pick it up - and always said that it was out of tune. So he tuned it - by ear - but basically tuned 'down' the bass E string only. When he finished - I tested it against the tuner - and in fact the bass E string was a tad lower than the exact bass E. He repeated this time & time again!
So he liked a lower bass E - & I preferred a higher bass E!! go figure!!

I realize the 'sweetner' is different from this - but I wonder if we perceive harmonics differently as well?

Well fine. You just made me go back in time to Mrs. McCarthy's 3rd grade class where you were all the nerdy braniacs and I was the one who colored out of the lines. Mrs. Mc Carthy hated me.

But at least we still had MUSIC and ART in grammar school.

P.S. I use an on line tuner.

Thanks, Mompodell ....I don't feel so bad now....I quit reading as I thought maybe the language had turned to Greek and that's why I couldn't understand a word!!!

It's not really that complicated. But I guess since I was a hobbyist piano tuner I may be the wrong one to judge.