New guitar keeps getting out of tune

hello, ive started learning guitar 3 days ago with my new cordoba c3m, the guitar is great for beginners, sound and keyboard etc. everything cool. only problem is strings get out of tune after a short while, mostly the lowest 3 strings, they get out of tune by 1/8 to 1/4 interval, now the first night it was more than that but tonight they got out of tune a little less. im thinking is this going to get better in a day or two, will strings stretch, could there be a problem with my guitar, everything looks fine no deformation whatsoever, completely clean new guitar

Hey & welcome to GT!

Originally Posted by: bilinmeyen.13

... my new cordoba c3m, the guitar is great for beginners, sound and keyboard etc. everything cool. only problem is strings get out of tune after a short while, mostly the lowest 3 strings ...

https://www.guitartricks.com/lesson.php?input=24279&s_id=1990

Best of success with it! Let us know how it goes or if you have any other questions.

Originally Posted by: ChristopherSchlegel

Hey & welcome to GT!

That's a nylon string guitar, right? Nylon strings can be problematic! :) You might need to stretch them & be patient as they gradually settle in. Please check this video lesson for tips on dealing that situation.

https://www.guitartricks.com/lesson.php?input=24279&s_id=1990

Best of success with it! Let us know how it goes or if you have any other questions.

I think tuning keeps getting better, but ive noticed that there is a minimal intonation problem on g string, open string is not perfectly related to 12th fret, ive calculated frequencies, there is a 2 hz difference when i double the amount of open string, other strings are better in this regard, ive researched a bit and people on internet say that this is normal no guitar is perfectly intonated, no fret is perfectly intonate according to a=440 there is always a minimal difference, is this true? at first i didnt notice any difference in sound, concerning the g string, but now its psychological and i think g string open or not sounds not as good as first two nylon strings, its probably normal but i need affirmation on this matter just to ease my mind, is g string a little thicker (maybe) then the first two nylon strings? can you tell me are these frequencies normal (a fret on g= 220.6 g 12th= 394.4 g open= 196.0)

Originally Posted by: bilinmeyen.13

I think tuning keeps getting better, but ive noticed that there is a minimal intonation problem on g string ...[/quote][p]Good observation.

Yes, you are right. The guitar is difficult to keep intonation consistent with both open string notes & fretted notes. This is especially noticable on acoustic guitars with non-compensated bridges. Sometimes you can lower the bridge a bit. Or lower the nut slot on the G string. Those can help you close the gap. But the are pretty drastic options & best left to a pro guitar tech.

This is why electric guitars have individual sliding therefore adjustable bridge saddles. To close the gap between the open string notes & the fretted notes.

Another possible solution is to install a compensated bridge for acoustics.

http://www.musiciansfriend.com/accessories/graph-tech-tusq-fully-compensated-saddle-1-8

https://www.youtube.com/watch?v=Xm1pXryt0Nk

The idea is to have a bridge topology with the necessary micro adjustments to get better intonation. Again, this is definitely a job for a pro guitar tech.

Originally Posted by: bilinmeyen.13ive researched a bit and people on internet say that this is normal no guitar is perfectly intonated, no fret is perfectly intonate according to a=440 there is always a minimal difference, is this true?

It depends on what you mean by perfect. :)

There are some musicians that claim since real world fretted instruments can't play in just intonation in multiple keys, they are imperfect. So, if you want to play in multiple keys across an instrument (guitar, piano, etc.) you have to use a different tuning called equal temperament, which, unlike just intonation, has "beats" so it's a compromise & imperfect.

Personally, I think it's poor reasoning to claim that something that is impossible to do is the standard of perfection & that something that solves a problem is imperfect & a compromise. In my estimation, equal temperament solves the problem perfectly & is therefore perfect, as well as practical.

Every time I have a discussion or debate about this topic with someone that claims equal temperament is somehow imperfect, I ask the question, "Why is having no beats on any interval a desirable solution?" That's the crux of the issue. Another good question is, "Why is having no beats on any interval preferable to being able to play chromatically in multiple keys?"

Anyway, it's a complex topic. :) Here's a wiki article about it.

https://en.wikipedia.org/wiki/Equal_temperament

Meanwhile, back in the real world. :p Regarding the guitar, it is difficult to tune completely across the guitar. But most of this is due to the difference in angle between 2 different things:

1. An open string note which rings from nut to bridge with no angle.

2. A fretted note which immediately has an angle from the nut to the fret you are fingering, then back up toward the bridge.

That's why sanding down the nut slots & getting a better bridge can help narrow the gap between open & fretted notes. But most of this is due to the nature of trying to make a machine precise enough that it will work no matter where a human finger is placed, high or low on the fretboard.

[quote=bilinmeyen.13]

...is g string a little thicker (maybe) then the first two nylon strings? can you tell me are these frequencies normal (a fret on g= 220.6 g 12th= 394.4 g open= 196.0)

If you are tuning to A 440Hz, then the open G string is 392Hz.

https://www.seventhstring.com/resources/notefrequencies.html

But, yes you will probably notice small differences all the time between the fretted notes & the open string notes.

Hope this helps!

Thanks for the detailed answer it really helps, so i guess its all ok for the guitar im using, now i shall focus more on lessons :)

Not a super detailed explanation, but I know that my guitars usually take about a week to "settle in". I was worried that my Strat was messed up until I remembered what my old bass instructor told me "You have to let your lady settle in before you start thinking she's crazy".

A guitar that sounds great in the temperature and humidity controlled store may take a while to adjust to your home (I live near a river so I know my home's humidity is radically different than the store I go to).

Just F.Y.I. my Strat took about ten days to settle in, now she only need an occasional adjustment to keep her playing the right notes.

Maybe it's strings fault? If so, try new set with medium tension. Check these[br]https://musicsquare.co.uk/108960_LaBella-2001M-Classical-Guitar-Strings-29415-medium-tension.html[br]https://www.sweetwater.com/store/detail/EJ45