@@ -1,7 +1,7 @@

 /*

  * SSEQ Player - Channel structures

  * By Naram Qashat (CyberBotX) [cyberbotx@cyberbotx.com]

- * Last modification on 2014-10-23

+ * Last modification on 2014-10-27

  *

  * Adapted from source code of FeOS Sound System

  * By fincs

@@ -44,6 +44,7 @@ TempSndReg::TempSndReg() : CR(0), SOURCE(nullptr), TIMER(0), REPEAT_POINT(0), LE

 bool Channel::initializedLUTs = false;

 double Channel::sinc_lut[Channel::SINC_SAMPLES + 1];

+double Channel::window_lut[Channel::SINC_SAMPLES + 1];

 #ifndef M_PI

 static const double M_PI = 3.14159265358979323846;

@@ -65,7 +66,8 @@ Channel::Channel() : chnId(-1), tempReg(), state(CS_NONE), trackId(-1), prio(0),

 		for (unsigned i = 0; i <= SINC_SAMPLES; ++i, x += dx)

 		{

 			double 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->sinc_lut[i] = std::abs(x) < SINC_WIDTH ? sinc(x) : 0.0;

+			this->window_lut[i] = 0.40897 + 0.5 * std::cos(M_PI * y) + 0.09103 * std::cos(2 * M_PI * y);

 		}

 		this->initializedLUTs = true;

 	}

@@ -625,10 +627,12 @@ int32_t Channel::Interpolate()

 		int i = SINC_WIDTH, shift = static_cast<int>(std::floor(ratio * SINC_RESOLUTION));

 		int step = this->reg.sampleIncrease > 1.0 ? static_cast<int>(SINC_RESOLUTION / this->reg.sampleIncrease) : SINC_RESOLUTION;

 		int shift_adj = shift * step / SINC_RESOLUTION;

+		int window_step = SINC_RESOLUTION;

 		for (; i >= -static_cast<int>(SINC_WIDTH - 1); --i)

 		{

 			int pos = i * step;

-			kernel_sum += kernel[i + SINC_WIDTH - 1] = this->sinc_lut[std::abs(shift_adj - pos)];

+			int window_pos = i * window_step;

+			kernel_sum += kernel[i + SINC_WIDTH - 1] = this->sinc_lut[std::abs(shift_adj - pos)] * this->window_lut[std::abs(shift - window_pos)];

 		}

 		double sum = 0.0;

 		for (i = 0; i < static_cast<int>(SINC_WIDTH * 2); ++i)

@@ -1,7 +1,7 @@

 /*

  * SSEQ Player - Channel structures

  * By Naram Qashat (CyberBotX) [cyberbotx@cyberbotx.com]

- * Last modification on 2014-09-17

+ * Last modification on 2014-10-27

  *

  * Adapted from source code of FeOS Sound System

  * By fincs

@@ -220,6 +220,7 @@ struct Channel

 	static const unsigned SINC_WIDTH = 8;

 	static const unsigned SINC_SAMPLES = SINC_RESOLUTION * SINC_WIDTH;

 	static double sinc_lut[SINC_SAMPLES + 1];

+	static double window_lut[SINC_SAMPLES + 1];

 	RingBuffer<SINC_WIDTH * 2> ringBuffer;