--- a/src/in_ncsf/SSEQPlayer/Channel.cpp
+++ b/src/in_ncsf/SSEQPlayer/Channel.cpp
@@ -63,7 +63,10 @@
 	{
 		double dx = static_cast<double>(SINC_WIDTH) / SINC_SAMPLES, x = 0.0;
 		for (unsigned i = 0; i <= SINC_SAMPLES; ++i, x += dx)
-			this->sinc_lut[i] = std::abs(x) < SINC_WIDTH ? sinc(x) * sinc(x / SINC_WIDTH) : 0.0;
+		{
+			float y = x / SINC_WIDTH;
+			this->sinc_lut[i] = std::abs(x) < SINC_WIDTH ? sinc(x) * (0.40897 + 0.5 * std::cos(M_PI * y) + 0.09103 * std::cos(2 * M_PI * y)) : 0.0;
+		}
 		this->initializedLUTs = true;
 	}
 }

--- a/src/in_ncsf/XSFConfig_NCSF.cpp
+++ b/src/in_ncsf/XSFConfig_NCSF.cpp
@@ -81,7 +81,7 @@
 			SendMessageW(GetDlgItem(hwndDlg, idInterpolation), CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(L"Linear"));
 			SendMessageW(GetDlgItem(hwndDlg, idInterpolation), CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(L"4-point, 3rd-order Legrange"));
 			SendMessageW(GetDlgItem(hwndDlg, idInterpolation), CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(L"6-point, 5th-order Legrange"));
-			SendMessageW(GetDlgItem(hwndDlg, idInterpolation), CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(L"16-point Sinc (Lanczos Window)"));
+			SendMessageW(GetDlgItem(hwndDlg, idInterpolation), CB_ADDSTRING, 0, reinterpret_cast<LPARAM>(L"16-point Sinc (Nuttall 3-term Window)"));
 			SendMessageW(GetDlgItem(hwndDlg, idInterpolation), CB_SETCURSEL, this->interpolation, 0);
 			// Mutes
 			for (int x = 0, numMutes = this->mutes.size(); x < numMutes; ++x)