python - Raspberry Pi3 sampler using pygame.mixer -

i'm new python , raspberry.

i'm making sampler raspberry. objective "play specific wave file when specific key pressed".

i specify wave files, loop , gate attributes in xml file. code working there's lag between key pressed , sound.

how can improve code ? pygame problem ? need use module pyglet or wave module ?

thanks in advance answer , sorry bad english.

here's code :

def playsample(spl, snd, bool):         if spl.get_loop() == "on":         if spl.get_gate() == "on":  #loop on, gate on             snd.play(-1)         else:                       #loop on, gate off             bool = not bool             if bool:                 snd.play(-1)             else:                 snd.stop()     elif spl.get_gate() == "on":    #loop off, gate on               snd.play()     else:                           #loop off, gate off         snd.stop()         snd.play()     return bool  def stopsample(spl, snd):      if spl.get_gate() == "on":         snd.stop()            while true:     event in pygame.event.get():         if event.type == pygame.keydown:                 if event.key == pygame.k_left:                             loopa = playsample(spla, sounda, loopa)                              if event.key == pygame.k_up:                             loopb = playsample(splb, soundb, loopb)                              if event.key == pygame.k_down:                           loopc = playsample(splc, soundc, loopc)                              if event.key == pygame.k_right:  #next patch                    pos += 1                 if pos > len(tab_patch) - 1:                     pos = 0                                 loadsamples()                              if event.key == pygame.k_p:     #previous patch                 pos -= 1                 if pos < 0:                     pos = len(tab_patch) - 1                                 loadsamples()          if event.type == pygame.keyup:                   if event.key == pygame.k_left:                           stopsample(spla, sounda)              if event.key == pygame.k_up:                             stopsample(splb, soundb)                              if event.key == pygame.k_down:                           stopsample(splc, soundc)