Can we trust tuners?

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Cork
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Post by Cork »

Denny wrote:
Cork wrote:Since your recent post on this thread there seem to be those who could not perceive the difference between equal temperament and just intonation.
good thing they play flute then, innit....
wouldn't do well as a piano tuner
Well, piano scale sux, dunnit...

:-D
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Post by Gordon »

I'm repeating myself a bit here, but playing in tune by yourself is a matter of having a good ear, just as in singing - no one sings with a tuner in their face. Whether this will be in just or equal temperament is only important when there's accompaniment in one or the other, and then the adjustment is made by the singer, without a lot of discussion about it.

Flutes are tuned by their makers - to a point. Certain compromises are made so the flute(s) will work with a variety of instruments, in just or equal temperament, whether pianos and/or pipes. It has to do with control over your embouchure and instrument, so this isn't really about just or equal temperament at all. What's important is how to adjust tuning while you play, as necessary.
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Post by groxburgh »

Cork wrote:OK, there seem to be some here who could be unaware of two, very different forms of tuning, namely, of equal temperament and of just intonation.

A show of hands, please, as just who could be unaware of such a difference?

BTW, I didn't invent this, as this has been a matter of music for more than the past few centuries.

So, c'mon, let's get into it!
So here's a quick question to test yourself to see if you understand just tuning, equal temperment and the differences between them:
You're playing your instrument with nice sounding just tuning in the key of D. Now you want to change to play in the key of A, so you'll use (mostly) G#) instead of G - but what other note do you need to adjust the tuning on? If you were using an equal tempered tuner to check that note, how many cents sharp or flat of equal tempered (compared to the A) would you need to play it?

I'll post the answer later.
Cheers
Graeme
Cork
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Post by Cork »

;-)
Last edited by Cork on Wed Mar 19, 2008 4:53 pm, edited 1 time in total.
groxburgh
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Post by groxburgh »

Gordon wrote:I'm repeating myself a bit here, but playing in tune by yourself is a matter of having a good ear, just as in singing - no one sings with a tuner in their face. Whether this will be in just or equal temperament is only important when there's accompaniment in one or the other, and then the adjustment is made by the singer, without a lot of discussion about it.

Flutes are tuned by their makers - to a point. Certain compromises are made so the flute(s) will work with a variety of instruments, in just or equal temperament, whether pianos and/or pipes. It has to do with control over your embouchure and instrument, so this isn't really about just or equal temperament at all. What's important is how to adjust tuning while you play, as necessary.
You are correct Gordon. But the original question was "Can we trust tuners" and my answer is, usually yes but only if you understand temperments; many tuners display equal temperment, and if you don't understand what this means compared to the temperment you want, then you can't trust them.

A tuner gives you information; you have to know what it means to be able to make use of it.

Cheers
Graeme
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Post by clark »

Well, Grox, the changing keys thing throws a monkey wrench into the mix, but here's what I know: In Just Temper if I started out on the D and tuned to perfect 5ths around the cycle of fifths when I got back around to a D again I would be 24 cents sharp (pythagorean comma? as I recall?). So I imagine the answer derives from this...the perfect 5th from the G# of coarse is D#. How many cents? Don't know...24?

Clark
groxburgh
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Post by groxburgh »

Here's what you need to know about just tuning and equal temperment to be able to use an equal tempered tuner: Not the theoretical stuff about why but the actual useful practical bit.

Just / equal tempered tuning differences in cents
1 0
2 +4
3 -14 (major 3rd)
4 -2
5 +2
6 -16
7 -12 (debatable there are several just tunings)

What does this mean?
If you want just tuning in the key of D major, set D to be in tune on the equal tempered tuner, when F# (the major 3rd to D) reads -14 cents on your equal tempered tuner then F# will be correct for just tuning (in key of D)

etc for the other notes of the scale.

Now you should be able to work out what note is out of tune if you change to wanting just tuning in key of A.

Cheers
Graeme
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Post by groxburgh »

Well it's Wednesday evening here so I'm off to a session where everyone can attempt to play in tune with my equal temper tuned accordion, and the equal temper tuned guitar, and at the same time the (debatably) just tuned pipes.

Cheers
Graeme
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Post by david_h »

If we were playing with pipes in a mode with a home note other than D should we still use the just scale based on the D of the drones ?

If so then when not playing with a D drone would it then sound sweeter to use a just scale based on the home note, or does it sound more 'traditional' if we stick with the D scale ?

I am thinking particularly of tunes in E dorian or E minor. Should I be practising them over an E drone ? I am and I like the sound, but is it 'correct' ?
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Re: Can we trust tuners?

Post by jemtheflute »

colomon wrote:pianos existed for centuries before equal temperament was invented.
Well, not quite! Keyboards in the form of organs, harpsichord family instruments, yes. Equal temperament was already understood by Bach's time, but not preferred. The pianoforte was only in its earliest forms in the mid-late C18th. Colomon is right, however, that Cork has the rationale for equal temperament wrong. It has little or nothing to do with differences between very low and very high pitch ranges on or between instruments, but everything to do with how the octave at whatever pitch is divided and the fact that the mathematical ratios of the vibration numbers (frequencies) of other intervals such as the fifth do not when multiplied coincide with the multiples of the octave. Thus to produce any workable instrument or even to sing or just to have a theoretical, mathematical scale - and not necessarily a diatonic or Western chromatic one at that, compromises and compression of some kind are required. Of course, singers and players of unfretted strings and trombone have direct access to the entire range of pitches/frequencies within their compass and make these compromises in practice without reference to theory (normally), though what they do "naturally" is of course susceptible of analysis. Those (most) of us playing instruments where pitches of various notes are more "built in" to the instrument have more or less capacity to bend those pitches depending on the mechanics of sound generation in the particular instrument. Keyboards, save the clavichord, have no such capacity - and that's the devil of them. Pity the poor string trio or quartet playing with piano for Mozart or Beethoven or Schubert piano quartets/quintets!

There are plenty of good explanations of both the maths/physics/acoustics and the aesthetics of this issue available, so I'm not going further to try an amateur re-hash here! From a flute point of view, try reading Quantz on the subject of temperament and intonation!

(Sorry about the emboldened, underlined a's! I'm just puzzled as to how some folk who are otherwise so knowledgeable about a highly specialist topic can so persistently mis-spell the technical, jargon, specialist word for it?????? Excuse my pedantry moment.......or not!)
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Post by talasiga »

qui jure suo utitur neminem laedit
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Post by Doug_Tipple »

I don't think that this aspect of tuning has been mentioned yet. As you know, the flute tone isn't very rich in overtone content. It is also one of the hardest instruments of the orchestra to play in tune, as the flautist needs to continually make embouchure adjustments to control the desired pitch, and research shows that they are not all that good at doing this. With that being said, there is a point of view that with flutes a slight distuning can have a positive equalizing effect.
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Re: Can we trust tuners?

Post by colomon »

jemtheflute wrote:
colomon wrote:pianos existed for centuries before equal temperament was invented.
Well, not quite! Keyboards in the form of organs, harpsichord family instruments, yes. Equal temperament was already understood by Bach's time, but not preferred.
You're quite right, I should have said something like "used commonly" rather than "invented." But the point remains that in Bach's day, a piano would not have used equal temperament, and orchestral strings and winds still do not use it by default.
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Post by Gordon »

groxburgh wrote:
Gordon wrote:I'm repeating myself a bit here, but playing in tune by yourself is a matter of having a good ear, just as in singing - no one sings with a tuner in their face. Whether this will be in just or equal temperament is only important when there's accompaniment in one or the other, and then the adjustment is made by the singer, without a lot of discussion about it.

Flutes are tuned by their makers - to a point. Certain compromises are made so the flute(s) will work with a variety of instruments, in just or equal temperament, whether pianos and/or pipes. It has to do with control over your embouchure and instrument, so this isn't really about just or equal temperament at all. What's important is how to adjust tuning while you play, as necessary.
You are correct Gordon. But the original question was "Can we trust tuners" and my answer is, usually yes but only if you understand temperments; many tuners display equal temperment, and if you don't understand what this means compared to the temperment you want, then you can't trust them.

A tuner gives you information; you have to know what it means to be able to make use of it.

Cheers
Graeme
Well, yes, but the original question opened an unimportant can of worms, IMO.

When playing a given pitch, say, an A, G, or E, to a tuner, a flute can easily match it, if the player can - or an A given by the fiddler, the piper, or the guitarist playing beside them. When we play together, we don't discuss temperament, nor think in terms of it - we play in tune, with a selected starting pitch that is, well, close enough for rock n' roll - um, ITM.
Most of us leave the technical analysis of which note needs to be raised or lowered depending on temperament to the music theorists among us; if you chose a particular temperament and stuck to it, you'd undoubtedly end up out of tune with somebody.

So, the original question was, can we trust tuners? Yes, to get the starting pitch, or - if you're starting out - to learn to match pitches and hold them, training both your ear and your embouchure. After that, to play tunes completely in tune with yourself or accompanied, an electronic tuner is no more or less useful than a tuning fork.
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Post by groxburgh »

OK. Instrument just tuned in D has A at +2cents compared to equal temperment, and B at -16cents (18cents below A). Just tuned in key of A, B should be +4cents, ie 22 cents higher.

Similarly with the keys of G and D. In D we want the E to be 4 cents above equal temperment, but that will be 22 cents too high for the key of G. Have you ever noticed the Es tend to sound sharp on tunes in key of G?

In the real world, what it means is that if using a tuner which is set in equal temperment and you get the G/A/Ds close to reading in tune you'd probably want the F#s to be flat by about 15cents, and the C#s by about 12cents, etc. Where you want E is debatable, for tunes in key of G you want it about -15, for tunes in D or A you want it +ish, similarly for B for tunes in D or G it should be about -15cents.

I mostly agree with Gordon about how to use a tuner. I've used a Korg CA-30 and found it accurate, other makes/models may vary. More useful is software mentioned by Terry and found on this site http://www1.ocn.ne.jp/~tuner/tuner_e.html and for looking at how in tune you or someone else actually plays use Tartini http://miracle.otago.ac.nz/postgrads/tartini/

Gordon if you want to open up another larger can of worms then use Tartini to look at the tuning of the recordings available - any of them, eg Wooden Flute Obsession has a 10 second .mp3 clip of each track. Some are very in tune. Some are very much not in tune. Most of the tracks list who made the flute being played as well as who played it and you'll find consistently the same thing from flutes by the same maker. Maybe this can of worms is also unimportant as it's just tuning, and it's the music that's important. And in any case it should be started as a new topic not continued in this one.

Had a good session last night despite the tuning issues
Cheers
Graeme
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