[pygame] pygame metronome

[Brian Gryder <bgryderclock@xxxxxxxxx>]

I am working on writing a metronome with Pygame.

http://www.pygame.org/project-Innep+Metronome-1594-2808.html

Here is a screenshot:

http://www.pygame.org/shots/1594.png

I am using "print \a" as the metronome click sound. I am using the pygame.time.Clock() to move the position of the metronome meter (called x) left and right across the screen. Occasionally the program will stutter and the sound with play a little early or late. Is this because I am using "print \a" instead of playing a wav file with the pygame library? Any suggestions for improvement? 

~Thank you

Brian

here is my code:

############## start innep.py #########

import pygame

from pygame.locals import *

from sys import exit

instr1 = "Up/Down Arrow = Increase/Decrease Tempo"

instr2 = "Right/Left Arrow = Increase/Decrease Tempo Range "

instr3 = "Space Bar = Disable/Enable graphic"

instr4 = "Tab Key = Disable/Enable sound"

instr5 = "S-Key/A-Key = Increase/Decrease Tempo Change Rate"

screenwidth = 800

screenheight = 600

bpm = 100.0

orgbpm = bpm

direction = "right"

tempochange = "increase"

showelements = "all"

tempochangerange = 0.05

tempochangerate = 0.02

green = (138,226,52)

blue = (114,159,207)

black = (46,52,54)

white = (238,238,236)

backgroundcolor = (0,0,255)

mute = False

pygame.init()

SCREEN_SIZE = (screenwidth, screenheight)

linestart = (0,0)

lineend = (0,screenheight)

screen = pygame.display.set_mode(SCREEN_SIZE, RESIZABLE, 32)

pygame.display.set_caption("Innep Metronome ~ (Penni Spelled Backwards)")

font = pygame.font.SysFont("arial",16);

distance_moved = 0.0

clock = pygame.time.Clock()

# X coordinate of our sprite

x = 0.0

# Speed in pixels per second  screenwidth = 1 bps or 60 bpm

#speed = screenwidth * bpm / 60

timer_seconds = 0.0

while True:

for event in pygame.event.get():

if event.type == QUIT:

exit()

if event.type == VIDEORESIZE:

SCREEN_SIZE = event.size

screenwidth,screenheight = SCREEN_SIZE

screen = pygame.display.set_mode(SCREEN_SIZE, RESIZABLE, 32)

if event.type == KEYDOWN:

if event.key == K_UP:

orgbpm = orgbpm + 1.

print "increasing orgbpm" 

if event.key == K_DOWN:

orgbpm = orgbpm - 1.

print "decreasing orgbpm" 

if event.key == K_LEFT:

tempochangerange = tempochangerange - 1.

print "decreasing tempochangerange" 

if event.key == K_RIGHT:

tempochangerange = tempochangerange + 1.

print "increasing tempochangerange" 

if event.key == K_a:

tempochangerate = tempochangerate - .01

print "decreasing tempochangerate" 

if event.key == K_s:

tempochangerate = tempochangerate + .01

print "increasing tempochangerate"

if event.key == K_SPACE:

if showelements == "all":

showelements = "none"

print "showelements = none"

elif showelements == "none":

showelements = "all"

print "showelements = all"

if event.key == K_TAB:

if mute == False:

mute = True

print "muted"

elif mute == True:

mute = False

print "unmuted"

speed = screenwidth * (bpm / 60)

time_passed = clock.tick(30)

time_passed_seconds = time_passed / 1000.0

timer_seconds = timer_seconds + time_passed_seconds

if x >= screenwidth:

if mute == False:

print "\a"

direction = "left"

if x < 0:

if mute == False:

print "\a"

direction = "right"

if direction == "left":

distance_moved = time_passed_seconds * speed * -1

backgroundcolor = green

linestart = (x,0)

lineend = (x,(screenheight/2))

if direction == "right":

distance_moved = time_passed_seconds * speed * 1

backgroundcolor = blue

linestart = (x,(screenheight/2))

lineend = (x,screenheight)

if bpm > (orgbpm + tempochangerange):

tempochange = "decrease"

if bpm < (orgbpm - tempochangerange):

tempochange = "increase"

if bpm == orgbpm:

tempochange = "nochange"

if tempochange == "increase":

bpm = bpm + tempochangerate

if tempochange == "decrease":

bpm = bpm - tempochangerate

x = x + distance_moved

if showelements == "all":

screen.fill(backgroundcolor)

screen.blit(font.render(instr3,True,black),(0,0) )

screen.blit(font.render(instr4,True,black),(0,20) )

screen.blit(font.render(instr1,True,black),(0,40) )

screen.blit(font.render(instr2,True,black),(0,60) )

screen.blit(font.render(instr5,True,black),(0,80) )

screen.blit(font.render("Tempo:"+str(orgbpm),True,black),(0,100) )

screen.blit(font.render("Varying Tempo:"+str(bpm),True,black),(0,120) )

screen.blit(font.render("Tempo Range:" + \

str(tempochangerange),True,black),(0,140) )

screen.blit(font.render("Tempo Range Rate:" + \

str(tempochangerate),True,black),(0,160) )

 

pygame.draw.line(screen, white, linestart, lineend, 50)

pygame.display.update()  

############### end innep.py  #########