diff --git a/src/emu/sound/tms5110r.inc b/src/emu/sound/tms5110r.inc
index 3148e9089bb..3d34c0b5e3c 100644
--- a/src/emu/sound/tms5110r.inc
+++ b/src/emu/sound/tms5110r.inc
@@ -288,34 +288,45 @@ struct tms5100_coeffs
 /* chirp */
 #define TI_0280_PATENT_CHIRP \
 	/* Chirp table */\
-	{   0,  42, -44, 50, -78, 18, 37, 20,\
-		2, -31, -59,  2,  95, 90,  5, 15,\
-		38, -4,  -91,-91, -42,-35,-36, -4,\
-		37, 43,   34, 33,  15, -1, -8,-18,\
-		-19,-17,   -9,-10,  -6,  0,  3,  2,\
-		1,  0,    0,  0,   0,  0,  0,  0,\
-		0,  0,    0,  0 },
+	{   0x00, 0x2a, 0xd4, 0x32, 0xb2, 0x12, 0x25, 0x14,\
+		0x02, 0xe1, 0xc5, 0x02, 0x5f, 0x5a, 0x05, 0x0f,\
+		0x26, 0xfc, 0xa5, 0xa5, 0xd6, 0xdd, 0xdc, 0xfc,\
+		0x25, 0x2b, 0x22, 0x21, 0x0f, 0xff, 0xf8, 0xee,\
+		0xed, 0xef, 0xf7, 0xf6, 0xfa, 0x00, 0x03, 0x02,\
+		0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00 },
+
+// almost, but not exactly the same as the patent chirp above (25 bits differ)
+#define TI_2801_CHIRP \
+	/* Chirp table */\
+	{   0x00, 0x2b, 0xd4, 0x33, 0xb3, 0x12, 0x25, 0x14,\
+		0x02, 0xe2, 0xc6, 0x03, 0x60, 0x5b, 0x05, 0x0f,\
+		0x26, 0xfc, 0xa6, 0xa5, 0xd6, 0xdd, 0xdd, 0xfd,\
+		0x25, 0x2b, 0x23, 0x22, 0x0f, 0xff, 0xf8, 0xef,\
+		0xed, 0xef, 0xf7, 0xf7, 0xfa, 0x01, 0x04, 0x03,\
+		0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00 },
 
 //TODO: Fix me! below is INACCURATE, no decap of 2802 yet!
 #define TI_2802_CHIRP \
 	/* Chirp table */\
-	{   0,  42, -44, 50, -78, 18, 37, 20,\
-		2, -31, -59,  2,  95, 90,  5, 15,\
-		38, -4,  -91,-91, -42,-35,-36, -4,\
-		37, 43,   34, 33,  15, -1, -8,-18,\
-		-19,-17,   -9,-10,  -6,  0,  3,  2,\
-		1,  0,    0,  0,   0,  0,  0,  0,\
-		0,  0,    0,  0 },
+	{   0x00, 0xa3, 0xbe, 0xee, 0x38, 0x78, 0x7f, 0x3e,\
+		0xe2, 0xe0, 0x26, 0x19, 0xce, 0x06, 0x1e, 0xd0,\
+		0x12, 0xcd, 0xea, 0xde, 0xda, 0x02, 0xff, 0x06,\
+		0xfe, 0x00, 0xfe, 0xfb, 0xfd, 0xfd, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00 },
 
 #define TI_LATER_CHIRP \
 	/* Chirp table */\
-	{   0x00, 0x03, 0x0F, 0x28, 0x4C, 0x6C, 0x71, 0x50,\
-		0x25, 0x26, 0x4C, 0x44, 0x1A, 0x32, 0x3B, 0x13,\
-		0x37, 0x1A, 0x25, 0x1F, 0x1D, 0x00, 0x00, 0x00,\
-		0,  0,  0,  0,  0,  0,  0,  0,\
-		0,  0,  0,  0,  0,  0,  0,  0,\
-		0,  0,  0,  0,  0,  0,  0,  0,\
-		0,  0,  0,  0 },
+	{   0x00, 0x03, 0x0f, 0x28, 0x4c, 0x6c, 0x71, 0x50,\
+		0x25, 0x26, 0x4c, 0x44, 0x1a, 0x32, 0x3b, 0x13,\
+		0x37, 0x1a, 0x25, 0x1f, 0x1d, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00 },
 
 /* TMS5100/TMC0281:
    (Die revs A, B; 1977?-1981?)
@@ -399,7 +410,7 @@ static const struct tms5100_coeffs T0280F_2801A_coeff =
 	{
 	TI_2801_2501E_LPC
 	},
-	TI_0280_PATENT_CHIRP
+	TI_2801_CHIRP
 	/* interpolation coefficients */
 	{ 3, 3, 3, 2, 2, 1, 1, 0 }
 };
@@ -420,7 +431,7 @@ static const struct tms5100_coeffs M58817_coeff =
 	{
 	TI_2801_2501E_LPC
 	},
-	TI_0280_PATENT_CHIRP
+	TI_2801_CHIRP
 	/* interpolation coefficients */
 	{ 3, 3, 3, 2, 2, 1, 1, 0 }
 };