diff --git a/vsrgtools/blur.py b/vsrgtools/blur.py
index 7c84317..9bc6d97 100644
--- a/vsrgtools/blur.py
+++ b/vsrgtools/blur.py
@@ -10,7 +10,7 @@
 from vspyplugin import FilterMode, ProcessMode, PyPluginCuda
 from vstools import (
     ConvMode, CustomNotImplementedError, CustomRuntimeError, FunctionUtil, NotFoundEnumValue, PlanesT, StrList,
-    check_variable, core, depth, fallback, get_depth, get_neutral_values, join, normalize_planes, normalize_seq, split,
+    check_variable, core, depth, fallback, get_depth, get_neutral_value, join, normalize_planes, normalize_seq, split,
     to_arr, vs
 )
 
@@ -263,7 +263,7 @@ def sbr(
 
     planes = normalize_planes(clip, planes)
 
-    neutral = get_neutral_values(clip)
+    neutral = get_neutral_value(clip)
 
     blur_func = partial(blur, radius=radius, mode=mode, planes=planes)
 
diff --git a/vsrgtools/contra.py b/vsrgtools/contra.py
index f5086d3..967ec6f 100644
--- a/vsrgtools/contra.py
+++ b/vsrgtools/contra.py
@@ -6,7 +6,7 @@
 
 from vsexprtools import complexpr_available, norm_expr
 from vstools import (
-    CustomValueError, GenericVSFunction, PlanesT, check_ref_clip, check_variable, clamp_arr, get_neutral_values,
+    CustomValueError, GenericVSFunction, PlanesT, check_ref_clip, check_variable, clamp_arr, get_neutral_value,
     iterate, normalize_planes, to_arr, vs
 )
 
@@ -42,10 +42,7 @@ def contrasharpening(
     assert check_variable(flt, contrasharpening)
     check_ref_clip(src, flt, contrasharpening)
 
-    if flt.format.sample_type == vs.INTEGER:
-        neutral = get_neutral_values(flt)
-    else:
-        neutral = [0.0]
+    neutral = get_neutral_value(flt)
 
     planes = normalize_planes(flt, planes)
 
@@ -94,7 +91,7 @@ def contrasharpening_dehalo(
     weighted2 = median_blur(weighted, 2, planes=planes)
     weighted2 = iterate(weighted2, partial(repair, repairclip=weighted), 2, mode=rep_modes)
 
-    neutral = get_neutral_values(flt)
+    neutral = get_neutral_value(flt)
 
     if complexpr_available:
         clips = [weighted, weighted2, src, flt]
@@ -163,10 +160,7 @@ def fine_contra(
     assert check_variable(flt, contrasharpening)
     check_ref_clip(src, flt, contrasharpening)
 
-    if flt.format.sample_type == vs.INTEGER:
-        neutral = get_neutral_values(flt)
-    else:
-        neutral = [0.0]
+    neutral = get_neutral_value(flt)
 
     planes = normalize_planes(flt, planes)
 
diff --git a/vsrgtools/freqs.py b/vsrgtools/freqs.py
index 18f7e48..f640afd 100644
--- a/vsrgtools/freqs.py
+++ b/vsrgtools/freqs.py
@@ -1,13 +1,13 @@
 from __future__ import annotations
 
 from itertools import count
-from math import e, log, pi, sin, sqrt
+from math import log, pi, sqrt
 from typing import Iterable
 
 from vsexprtools import ExprOp, ExprVars, combine, norm_expr
 from vstools import (
-    ColorRange, ConvMode, CustomIntEnum, CustomNotImplementedError, FuncExceptT, FunctionUtil, KwargsT, PlanesT,
-    StrList, check_ref_clip, flatten_vnodes, get_y, scale_value, vs
+    ConvMode, CustomIntEnum, CustomNotImplementedError, FuncExceptT, FunctionUtil, KwargsT, PlanesT,
+    StrList, check_ref_clip, flatten_vnodes, get_y, vs
 )
 
 from .blur import gauss_blur
diff --git a/vsrgtools/func.py b/vsrgtools/func.py
index 2ddf7ae..f2969f8 100644
--- a/vsrgtools/func.py
+++ b/vsrgtools/func.py
@@ -5,7 +5,7 @@
 
 from vsexprtools import complexpr_available, norm_expr
 from vstools import (
-    CustomIndexError, PlanesT, VSFunction, check_variable, core, fallback, get_neutral_values, normalize_planes, vs
+    CustomIndexError, PlanesT, VSFunction, check_variable, core, fallback, get_neutral_value, normalize_planes, vs
 )
 
 from .enum import LimitFilterMode
@@ -46,7 +46,7 @@ def median_diff(clip: vs.VideoNode, diffa: vs.VideoNode, diffb: vs.VideoNode, pl
     assert check_variable(clip, median_diff)
 
     planes = normalize_planes(clip, planes)
-    neutral = get_neutral_values(clip)
+    neutral = get_neutral_value(clip)
 
     if complexpr_available:
         expr = 'y z - D! x D@ y {mid} clamp D@ {mid} y clamp - -'
diff --git a/vsrgtools/limit.py b/vsrgtools/limit.py
index aca5abd..9b5f32c 100644
--- a/vsrgtools/limit.py
+++ b/vsrgtools/limit.py
@@ -91,8 +91,8 @@ def _limit_filter_lut(
 ) -> vs.VideoNode:
     assert check_variable(diff, limit_filter)
 
-    neutral = int(get_neutral_value(diff))
-    peak = int(get_peak_value(diff))
+    neutral = get_neutral_value(diff)
+    peak = get_peak_value(diff)
 
     thr = int(thr * peak / 255)
     largen_thr = int(largen_thr * peak / 255)