diff --git a/src/devices/sound/tms5110.cpp b/src/devices/sound/tms5110.cpp
index 3ab0b67f52d..1ab14ca6b3d 100644
--- a/src/devices/sound/tms5110.cpp
+++ b/src/devices/sound/tms5110.cpp
@@ -726,6 +726,9 @@ INT32 tms5110_device::lattice_filter()
 		m_u[2] = m_u[3] - matrix_multiply(m_current_k[2], m_x[2]);
 		m_u[1] = m_u[2] - matrix_multiply(m_current_k[1], m_x[1]);
 		m_u[0] = m_u[1] - matrix_multiply(m_current_k[0], m_x[0]);
+#ifdef DEBUG_LATTICE
+		INT32 err = m_x[9] + matrix_multiply(m_current_k[9], m_u[9]); //x_10, real chip doesn't use or calculate this
+#endif
 		m_x[9] = m_x[8] + matrix_multiply(m_current_k[8], m_u[8]);
 		m_x[8] = m_x[7] + matrix_multiply(m_current_k[7], m_u[7]);
 		m_x[7] = m_x[6] + matrix_multiply(m_current_k[6], m_u[6]);
@@ -743,9 +746,14 @@ INT32 tms5110_device::lattice_filter()
 		for (i = 9; i >= 0; i--)
 		{
 			fprintf(stderr,"Y%d:%04d ", i+1, m_u[i]);
-			fprintf(stderr,"b%d:%04d ", i+1, m_x[i]);
-			if ((i % 5) == 0) fprintf(stderr,"\n");
 		}
+		fprintf(stderr,"\n");
+		fprintf(stderr,"E:%04d ", err);
+		for (i = 9; i >= 0; i--)
+		{
+			fprintf(stderr,"b%d:%04d ", i+1, m_x[i]);
+		}
+		fprintf(stderr,"\n");
 #endif
 		return m_u[0];
 }
diff --git a/src/devices/sound/tms5220.cpp b/src/devices/sound/tms5220.cpp
index d04069e50b9..033bd4551df 100644
--- a/src/devices/sound/tms5220.cpp
+++ b/src/devices/sound/tms5220.cpp
@@ -1129,6 +1129,9 @@ INT32 tms5220_device::lattice_filter()
 		m_u[2] = m_u[3] - matrix_multiply(m_current_k[2], m_x[2]);
 		m_u[1] = m_u[2] - matrix_multiply(m_current_k[1], m_x[1]);
 		m_u[0] = m_u[1] - matrix_multiply(m_current_k[0], m_x[0]);
+#ifdef DEBUG_LATTICE
+		INT32 err = m_x[9] + matrix_multiply(m_current_k[9], m_u[9]); //x_10, real chip doesn't use or calculate this
+#endif
 		m_x[9] = m_x[8] + matrix_multiply(m_current_k[8], m_u[8]);
 		m_x[8] = m_x[7] + matrix_multiply(m_current_k[7], m_u[7]);
 		m_x[7] = m_x[6] + matrix_multiply(m_current_k[6], m_u[6]);
@@ -1146,9 +1149,14 @@ INT32 tms5220_device::lattice_filter()
 		for (i = 9; i >= 0; i--)
 		{
 			fprintf(stderr,"Y%d:%04d ", i+1, m_u[i]);
-			fprintf(stderr,"b%d:%04d ", i+1, m_x[i]);
-			if ((i % 5) == 0) fprintf(stderr,"\n");
 		}
+		fprintf(stderr,"\n");
+		fprintf(stderr,"E:%04d ", err);
+		for (i = 9; i >= 0; i--)
+		{
+			fprintf(stderr,"b%d:%04d ", i+1, m_x[i]);
+		}
+		fprintf(stderr,"\n");
 #endif
 		return m_u[0];
 }