feat : deleting none important target, effect

@@ -8,13 +8,13 @@ from scipy.fft import fft, fftfreq
 import math
 import time
 
-TARGET = "frequency" # frequency, amplitude, decibel
-EFFECT = "pitch_shift" # echo, pitch_shift, low_filter
+TARGET = "decibel" # frequency, decibel
+EFFECT = "pitch_shift" # pitch_shift, low_filter
 
 RATE = 44100
 CHUNK = 1024
 MAX_FREQ = 40 # max freq for pitch shifting
-MAX_AMPLITUDE = 10000 # max amplitude for pitch shifting
+MAX_AMPLITUDE = 1440735 # max amplitude for pitch shifting
 MAX_DECIBEL = 150 # max decibel for decibel shifting
 MIN_DECIBEL = 50
 EFFECT_LEVEL = 20 # number of effect level
@@ -142,7 +142,7 @@ class Effector:
         elif self.target == "amplitude":
             param = min(MAX_AMPLITUDE-1, amplitude) / MAX_AMPLITUDE
         elif self.target == "decibel":
-            param = min(MAX_DECIBEL-MIN_DECIBEL, db-MIN_DECIBEL) / MAX_DECIBEL-MIN_DECIBEL
+            param = min(MAX_DECIBEL-MIN_DECIBEL, db-MIN_DECIBEL) / (MAX_DECIBEL-MIN_DECIBEL)
 
         param = max(param, 0)
         return param