Phase Correlation Meter

resonant

Yes there is a good GonioMeter.

But how can we create a Phase Correlation Meter similar to the one below?

alt text

ustk

@resonant you'll need to run your own algorithm. It's not too hard to make, go search google for something like phase meter algorithm or left-right correlation algorithm you should definitely find something. There are several ways for doing this depending on the complexity and the response needed.

udalilprofile

@resonant Hello. Somewhere on the forum there is an algorithm you are interested in.)

resonant

@udalilprofile I think this is what you are referring to: https://forum.hise.audio/topic/10913/correlation/5?_=1765392189920

udalilprofile

@resonantNo) Someone from the user created a meter from the panel

dannytaurus

@resonant There's a phase correlation meter in the HISE master output panel.

The HISE source might give you some clues.

CleanShot 2025-12-29 at 10.44.03@2x.png

resonant

I'm trying to create a Correlation Meter using the method below. However, the meter gets stuck at +1 even if the signal is mono.

I'm getting the gain levels using getCurrentLevel Where do you think the mistake is?

L*R / sqrt(L² * R²)

HiseSnippet 1764.3oc6Y8zaaTDEe2DugD2+nVTQkCHzpJN3TUkl0IosnJjciSRSDNMV1gT3TY7tiiG55cbmc1TRPEwQ9JzaHwM9D.mnW4FRbfKbnHNgDH0KbFdyLq8NqyFW2PZgT08Pj22adu4898dy68lM0XTWbXHkYXleyc6hMLOoUicC3sqzFQBLVaICySasNJjiY1JRKtaWTXH1yvzb7aJHXNUNC4ySJsHxGE3hSHYXrEk3hqR5P3ITqU98I99qf7vaR5ns54KulKMnB0mFA1y3VyZzE4dWz13agDKaLKiUQgsMLunkq27ty6dkly6fPstpSyqfadMmq5ful6BduqqKxcgltNyMGxvbhk8HbJqAGwwgFl4Vj5sai1z6Gn1fsHgjl9XwKNFMfcVQdEpumvEE+1nRahuWsd.UnggoUsDXabErcNq0Idj9zSfuyHYXmHgN.ZNVZya7TlmyAYdYXRlZlTNkIcVqFtLRWdBGg8bBq0BfnYKDDmzME0ZMF6axYUgBqHfOSGzcwqvfW5KQghyN6krKVb1oudd34xW1tBkwv9HNgFXuNFVVdHDFxs2AAILLlujl86Y2Smai4Unc5RCfWJbg9q3BfBSDbiHd2HtH6BjTlNJja4VsvtfPIbERM39wE61xAaSBvy3xv.tJRxXaz7SDBKDHdYyDh4RVUP99MgDsBshBbENRgoy+YSkeJgJqBJKY+jVeD3vA7p3cv9E3rHLnR4RqO7k1B4GJWqZ0tfQrkOHR0KV29x1EVGANY38X79+pP0osunc+2pO8zJoAjLj5imoKi.PnROwb5glBWaKjeDNgc9GH9CDvfTMF2l2FayENu88I711e9bKr5dyjfLh0HwlBysfJT26IAsaP5z0GK7UmrhRZrSGba.FHldfoDJ1BQHA9PPztWTwlFn3IjiQ8K31SnKA5EbVHpkeJssUfB2fyYjlQbbAcF2l3waeIamYE4wO354GtkHzS7d1OUY.aQhQIt35zfC1AELy18DbNxbtg5ZJaHaGSyJTgdMK7VTNdC44CHe6A4sGjUqVYxKVc9P9TVrUYZCQvBAQcZhY5PgXgPktzkOmXzJe5pvDsERCVKfv2nKN98j5+NYTr0HFTgxtiGagvu3xhtmNtnaCehGlYP7DUb6evzP5.5sLMNHErXDmSCjJXBKQLomrVlRQGA4lzRkjlwt9AqsDhiD8Mh8Ev+5hYbh.FMWBuCz0V0EYJqkvg2kS6Jc13LHvlFI28SS1zaTdW8N8cRM4v22g344iqQCIhHu9.DFZap0SChR1uunh198nVkYHOB8lLZT2dQ0QQs8QvCRwn8q382HFFAf5EAMISOWf33ZLCgOq2LVzvM.vhc0CZCNrPtCNae1LmkIyb4QzbOqUMB2sc116XYXuPt0ya6MdzqSYo54jXr4rV4COryYM6nOm0j8mXte4W41eRqj4.Fx7xFFKASNkBxj0tSH7QkyXh50B1ANnVi5iXCB3ieTMMYtQNqPNj1wlr3W2RB4GmLXYJwwGC9LV0P+eHgnNMhSB1FFelQfh2V2JpSC3ZktXvTCBv9ghFoiIZunde1dMVafC7ju72vSLSGw6lwLc5wTGRNuBRNg0sQ6fkyBKQi2P9dKJqi8MwAXl.qbFRIgebTuBc2Q9Jza3xASXSFJHrKMD6nq4F3NjMglfgonNfDE038n9RTLccLdTPZUqHkZUBnXE.JzV2jk6QrnNQHEJkxf2Soo0IZCV73RKGffDjFXvy81HzE.FANqmiUKBt7k7jjitfIjKpSdUDyChgtCq1ZtQq1Z5d7ZqOihtS775qJLh15QUAf+sy0bzzbdpd1np47xPWSeXD29sAZgh748nl9LoXTxtsoAjTY.0wPojs2FmJwJSGBtWFbUpDJmqbcrOFEpcN8cJWEt7GhA3D9PhEO6ePnLiWuokxbsEERre4XdzwOtMO5y7IzLC4iu+z+SGm9WGCCM1L9.phjshV5T+5TZmFj85kS9we6a+mkVB0oKzJMlT44l62Jcar5qZES6qd3C+gRKw1c.Z+dI84YK+q68GkVggw6g0x5gk8ckNxFb8Eca+SnP4WSMVoDdmT86zvpjj3.VUbKst3uU49LpS1tMWujwJXrm3KxnKwO+0OtTO55B7n+pvuTpJ890fMDP360WOe4OUdUx9nZrT4A5ftIFtLb5VdO43aT4ftW1ozH37pKl8pKl8pKl8R+EyFNj.kAO9DAOuEb4lh1x4dr+uevmWDAxWD6QGjKidGW0mSWTicRIEvuCj+ammxZcw61NC9YzML5.2A6NttoU09Dr3gUv4NrBN+gUvENrBdkCqfW8vJ30d5BJth7Mh3zNpyIFFqWaY4+1CSS0mLPdjw3efQSF.Z

dannytaurus

@resonant Looks like the correct formula for correlation is:

1.0 - (abs(left - right) / max(abs(left), abs(right)))

From the HISE source StereoInfo::calculate function:

void MainTopBar::ClickablePeakMeter::PopupComponent::StereoInfo::calculate(float left, float right)
{
	auto normGain = hmath::max(hmath::abs(left), hmath::abs(right));

	if(normGain > smoothedGain)
		smoothedGain = normGain;
	else
		smoothedGain *= coeff;

	if(normGain > 0.0f)
	{
		auto thisPan = hmath::abs(left) * -1.0f + hmath::abs(right);
		thisPan /= normGain;
		auto thisCorellation = 1.0 - (hmath::abs(left - right) / normGain);

		auto idx = jlimit(0, 100, roundToInt(101.0f * (thisPan * 0.5f + 0.5f)));

		panPos[0][idx] += normGain;

		smoothedPan = coeff * smoothedPan + (1.0f - coeff) * thisPan;

		smoothedCorrellation += thisCorellation;

		min_c = jmin<float>(min_c, smoothedCorrellation);
		max_c = jmax<float>(max_c, smoothedCorrellation);
	}
}

You would also need to implement some smoothing too.

dannytaurus

@resonant FYI +1 is the correct value for a mono signal.

It means there is 100% correlation between the left and right signals, which is the same as saying mono.

resonant

@dannytaurus Thank you for the idea.

Even if I don't use the Smoothed function for now and only use the formula, there's still an issue.

While HISE's own master analyzer correlation meter occasionally shows values less than 0, this correlation meter never shows values less than 0.

Also even when the signal ends, it remains stuck at positive values again.

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Phase Correlation Meter

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