Graphics, sound and multimedia • Help with logarithmic potentiometer

Code:

from os import environfrom random import randintfrom gpiozero import MCP3008, Buttonfrom signal import pauseenviron['PYGAME_HIDE_SUPPORT_PROMPT']='1'import pygame, sys, time, mathpygame.mixer.init()pygame.mixer.set_num_channels(10)pygame.init()#ELEC#num_channels = 8#pot_channels_1 = [MCP3008(channel=i, select_pin=8) for i in range(num_channels)]#pot_channels_2 = [MCP3008(channel=i, select_pin=7) for i in range(2)]pot_channel_1 = MCP3008(channel=0, select_pin=8)pot_channel_2 = MCP3008(channel=1, select_pin=8)pot_channel_3 = MCP3008(channel=2, select_pin=8)pot_channel_4 = MCP3008(channel=3, select_pin=8)pot_channel_5 = MCP3008(channel=4, select_pin=8)pot_channel_6 = MCP3008(channel=5, select_pin=8)pot_channel_7 = MCP3008(channel=6, select_pin=8)pot_channel_8 = MCP3008(channel=7, select_pin=8)pot_channel_9 = MCP3008(channel=0, select_pin=7)pot_channel_10 = MCP3008(channel=1, select_pin=7)pot_channel_11 = MCP3008(channel=2, select_pin=7)buttons = {    16: Button(16),    20: Button(20),    21: Button(21)}start_times = {pin: 0 for pin in buttons}press_durations = {pin: 0 for pin in buttons}#SOFTWAREtrack_base_name = "tent"track_format =".mp3"max_number_slices = 70track_name=""filename = 'setup.txt'preset_mode = Falsetrack1_slice_number = 0track2_slice_number = 0track3_slice_number = 0track4_slice_number = 0track5_slice_number = 0track6_slice_number = 0track7_slice_number = 0track8_slice_number = 0track9_slice_number = 0track10_slice_number = 0channel1 = pygame.mixer.Channel(0)channel2 = pygame.mixer.Channel(1)channel3 = pygame.mixer.Channel(2)channel4 = pygame.mixer.Channel(3)channel5 = pygame.mixer.Channel(4)channel6 = pygame.mixer.Channel(5)channel7 = pygame.mixer.Channel(6)channel8 = pygame.mixer.Channel(7)channel9 = pygame.mixer.Channel(8)channel10 = pygame.mixer.Channel(9)#pygame.mixer.music.load("1.wav")#pygame.mixer.music.unload()#pygame.mixer.music.play()#pygame.mixer.music.set_volume(0.5)def on_button_pressed(pin):    global start_times    start_times[pin] = time.time()def on_button_released(pin):    global start_times, press_durations    press_durations[pin] = time.time() - start_times[pin]    if press_durations[pin] < 3:        print(f"Appui court détecté sur le bouton {pin}: {press_durations[pin]:.2f} secondes")        preset_mode = True        if pin == 16:            print("Chargement preset sauvé 1")            channels[0][0].set_volume(values[0][0])            channels[1][0].set_volume(values[0][1])            channels[2][0].set_volume(values[0][2])            channels[3][0].set_volume(values[0][3])            channels[4][0].set_volume(values[0][4])            channels[5][0].set_volume(values[0][5])            channels[6][0].set_volume(values[0][6])            channels[7][0].set_volume(values[0][7])            channels[8][0].set_volume(values[0][8])            channels[9][0].set_volume(values[0][9])        elif pin == 20:            print("Chargement preset sauvé 2")            channels[0][0].set_volume(values[1][0])            channels[1][0].set_volume(values[1][1])            channels[2][0].set_volume(values[1][2])            channels[3][0].set_volume(values[1][3])            channels[4][0].set_volume(values[1][4])            channels[5][0].set_volume(values[1][5])            channels[6][0].set_volume(values[1][6])            channels[7][0].set_volume(values[1][7])            channels[8][0].set_volume(values[1][8])            channels[9][0].set_volume(values[1][9])        else:            print("Chargement preset sauvé 3")            channels[0][0].set_volume(values[2][0])            channels[1][0].set_volume(values[2][1])            channels[2][0].set_volume(values[2][2])            channels[3][0].set_volume(values[2][3])            channels[4][0].set_volume(values[2][4])            channels[5][0].set_volume(values[2][5])            channels[6][0].set_volume(values[2][6])            channels[7][0].set_volume(values[2][7])            channels[8][0].set_volume(values[2][8])            channels[9][0].set_volume(values[2][9])    else:         print(f"Appui long détecté sur le bouton {pin}: {press_durations[pin]:.2f} secondes")         if pin == 16:            print("Sauvegarde sur preset 1")            values[0][0] = channels_volume[0]            values[0][1] = channels_volume[1]            values[0][2] = channels_volume[2]            values[0][3] = channels_volume[3]            values[0][4] = channels_volume[4]            values[0][5] = channels_volume[5]            values[0][6] = channels_volume[6]            values[0][7] = channels_volume[7]            values[0][8] = channels_volume[8]            values[0][9] = channels_volume[9]         elif pin == 20:            print("Sauvegarde sur preset 2")            values[1][0] = channels_volume[0]            values[1][1] = channels_volume[1]            values[1][2] = channels_volume[2]            values[1][3] = channels_volume[3]            values[1][4] = channels_volume[4]            values[1][5] = channels_volume[5]            values[1][6] = channels_volume[6]            values[1][7] = channels_volume[7]            values[1][8] = channels_volume[8]            values[1][9] = channels_volume[9]         else:            print("Sauvegarde sur preset 3")            values[2][0] = channels_volume[0]            values[2][1] = channels_volume[1]            values[2][2] = channels_volume[2]            values[2][3] = channels_volume[3]            values[2][4] = channels_volume[4]            values[2][5] = channels_volume[5]            values[2][6] = channels_volume[6]            values[2][7] = channels_volume[7]            values[2][8] = channels_volume[8]            values[2][9] = channels_volume[9]         save_values(filename,values)                def read_values(filename):    # Ouvrir le fichier en mode lecture    with open(filename, 'r') as file:        lines = file.readlines()    values = []    for line in lines:        # Séparer les valeurs dans chaque série par la virgule et les convertir en flottants        values.append([float(val) for val in line.strip().split(',')])    return valuesdef save_values(filename, values):    # Préparer le contenu à écrire en formatant les valeurs    series_strings = []    for serie in values:        series_strings.append(','.join(f"{value:.2f}" for value in serie))    content = '\n'.join(series_strings)    # Ouvrir le fichier en mode écriture    with open(filename, 'w') as file:        file.write(content)def queueNextSlice(channel,track_number, track_slice_number):    if track_slice_number+1==max_number_slices:        track_slice_number=0    else:        track_slice_number+=1    track_name=track_base_name+track_number+"s"+str(track_slice_number)+track_format    track_slice=pygame.mixer.Sound(track_name)    print("QEUEING :"+track_name)    channel.queue(track_slice)    time.sleep(180/10)    return(track_slice_number)def initialReading(channel,track_number, track_slice_number):    track_name=track_base_name+str(track_number)+"s"+str(track_slice_number)+track_format    track_slice=pygame.mixer.Sound(track_name)    print("INITIAL READING :"+track_name)    channel.play(track_slice,fade_ms=1000)def adjust_potentiometer_value(raw_value, min_val=0.38, max_val=1.00, exponent=2):    # Vérifiez que la valeur brute est dans l'intervalle [min_val, max_val]    if raw_value < min_val:        raw_value = min_val    elif raw_value > max_val:        raw_value = max_val    # Normaliser la valeur brute à une échelle de 0 à 1    normalized_value = (raw_value - min_val) / (max_val - min_val)    # Appliquer une transformation exponentielle pour ajuster la courbe    adjusted_value = normalized_value ** exponent    return round(adjusted_value,2)channels = []channels_volume = []for i in range(10):    # Vous pouvez remplacer les valeurs suivantes par celles que vous souhaitez utiliser    if i ==0:        channel=channel1    elif i ==1:        channel=channel2    elif i ==2:        channel=channel3    elif i ==3:        channel=channel4    elif i ==4:        channel=channel5    elif i ==5:        channel=channel6    elif i ==6:        channel=channel7    elif i ==7:        channel=channel8    elif i ==8:        channel=channel9    elif i ==9:        channel=channel10    track_slice_number = randint(0,max_number_slices-1)    channel_info = [channel, str(i+1), track_slice_number]    channels.append(channel_info)    for i in range(11):    channels_volume.append(0.0)initialReading(channels[0][0],channels[0][1],channels[0][2])initialReading(channels[1][0],channels[1][1],channels[1][2])initialReading(channels[2][0],channels[2][1],channels[2][2])initialReading(channels[3][0],channels[3][1],channels[3][2])initialReading(channels[4][0],channels[4][1],channels[4][2])initialReading(channels[5][0],channels[5][1],channels[5][2])initialReading(channels[6][0],channels[6][1],channels[6][2])initialReading(channels[7][0],channels[7][1],channels[7][2])initialReading(channels[8][0],channels[8][1],channels[8][2])initialReading(channels[9][0],channels[9][1],channels[9][2])values = read_values(filename)print(f"Valeurs setup 1 : {values[0]}")print(f"Valeurs setup 2 : {values[1]}")print(f"Valeurs setup 3 : {values[2]}")channels[0][0].set_volume(values[0][0])channels[1][0].set_volume(values[0][1])channels[2][0].set_volume(values[0][2])channels[3][0].set_volume(values[0][3])channels[4][0].set_volume(values[0][4])channels[5][0].set_volume(values[0][5])channels[6][0].set_volume(values[0][6])channels[7][0].set_volume(values[0][7])channels[8][0].set_volume(values[0][8])channels[9][0].set_volume(values[0][9])while True:    #channels[0][2]=queueNextSlice(channels[0][0],channels[0][1],channels[0][2])    #channels[1][2]=queueNextSlice(channels[1][0],channels[1][1],channels[1][2])    #channels[2][2]=queueNextSlice(channels[2][0],channels[2][1],channels[2][2])    #channels[3][2]=queueNextSlice(channels[3][0],channels[3][1],channels[3][2])    #channels[4][2]=queueNextSlice(channels[4][0],channels[4][1],channels[4][2])    #channels[5][2]=queueNextSlice(channels[5][0],channels[5][1],channels[5][2])    #channels[6][2]=queueNextSlice(channels[6][0],channels[6][1],channels[6][2])    #channels[7][2]=queueNextSlice(channels[7][0],channels[7][1],channels[7][2])    #channels[8][2]=queueNextSlice(channels[8][0],channels[8][1],channels[8][2])    #channels[9][2]=queueNextSlice(channels[9][0],channels[9][1],channels[9][2])    raw_value = pot_channel_1.value    channels_volume[0] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_2.value    channels_volume[1] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_3.value    channels_volume[2] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_4.value    channels_volume[3] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_5.value    channels_volume[4] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_6.value    channels_volume[5] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_7.value    channels_volume[6] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_8.value    channels_volume[7] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_9.value    channels_volume[8] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_10.value    channels_volume[9] = round(1-adjust_potentiometer_value(raw_value),2)    raw_value = pot_channel_11.value    global_volume = round(1-adjust_potentiometer_value(raw_value),2)    # Affichage de la valeur lue    print(channels_volume , "global :", global_volume)    for vol in range(10):       channels[vol][0].set_volume(channels_volume[vol]*global_volume)     # Attente avant la prochaine lecture    #channels[3][0].set_volume(linear_value)    for pin, button in buttons.items():        button.when_pressed = lambda pin=pin: on_button_pressed(pin)        button.when_released = lambda pin=pin: on_button_released(pin)    time.sleep(0.1)