Unexpected drawing in Pygame

Question

i was making a sound visualiser in pygame . here is my source code:

#importing packages
import pygame,math
import sounddevice as sd

#colors 
COLOR = {
    'Black':[0,0,0],
    'White':[255,255,255],
    'Red':{255,0,0},
    'Yellow':[255,255,0],
    'Green':[0,255,0],
    'Blue':[0,0,255]
    }


#function to get value equal to or between min and max value

def clamp(min_value, max_value, value):

    if value < min_value:
        return min_value

    if value > max_value:
        return max_value

    return value

# class to draw bars in drawing

class AudioBar:

    def __init__(self, cx, cy, color,angle, width=1, min_height=20, max_height=300, extend=False):

        self.cx, self.cy= cx, cy

        self.color = color
        self.prev_height = min_height
        self.width, self.min_height, self.max_height = width, min_height, max_height

        self.angle = math.radians(angle)
        self.ax,self.ay=cx,cy

     # update position of bar
    def update(self,height):
        height = height * 1000
        height = clamp(self.min_height,self.max_height,height)
        if height<self.prev_height:
            height = self.prev_height -(height*0.1)
        else:
            height = self.prev_height + (height*0.1)
        self.ax = self.cx+(math.sin(self.angle)*height)
        self.ay = self.cy+(math.cos(self.angle)*height)
        self.prev_height = height
        return self
    # for rendering on screen
    def render(self, screen)->None:
        pygame.draw.line(screen,
                         self.color,
                         [self.cx,self.cy],
                         [self.ax,self.ay] ,
                         self.width)

# function to get data from input stream

#i am not get live data . help!

def getData() -> list:
    data,_ = stream.read(360)
    data = data.flatten()
    return data

# main function
def main()-> None:
    pygame.init()
    screen = pygame.display.set_mode([500,500])
    
    bars =[]
#range is 360 to draw lines on 360 angles
    for angle in range(360):
        bars.append(
            AudioBar(
                250,250,
                COLOR['Black'],
                angle))
    while True:
        data= getData()
        
        screen.fill(COLOR['White'])
        for i,d in enumerate(data):
            bars[i].update(d).render(screen)
        pygame.display.flip()
            

try:
    stream = sd.InputStream(
        device=1, channels=1)
    with stream:
        main()
except Exception as e:
    raise e

it worked out pretty well but there is unwanted plus sign + kind of pattern in drawing.

can this be fixed?

and one more thing out of question ,in stream the data which i am getting is not new but old which is getting render afterwards. I want live data.And also it to look good.