Hi,
I wrote a pygame program that play, loop and queue sounds files. My goal was
to keep it short, simple and only one file. The installation and operation
instructions are on the bottom of the file. Please see the code below and
let me know if you have any suggestions for improvement. Thank you Lenard
Lindstrom and Ian Mallett for your assistance! :)
# ------------start badpenni.py file ------------
# The Installation and Operation instructions are at the bottom of this
file.
import sys
import os
import pygame
import pygame.midi
from pygame.locals import *
pygame.mixer.pre_init(44100,-16,2,2048)
pygame.init()
pygame.midi.init()
sound1 = pygame.mixer.Sound("beat1.wav")
sound2 = pygame.mixer.Sound("beat2.wav")
sound3 = pygame.mixer.Sound("beat3.wav")
sound4 = pygame.mixer.Sound("beat4.wav")
def assignmidi():
global nextsound
if mymidinote == "48":
nextsound = sound1
updateScreenAndQueueNextSound()
if mymidinote == "50":
nextsound = sound2
updateScreenAndQueueNextSound()
if mymidinote == "52":
nextsound = sound3
updateScreenAndQueueNextSound()
if mymidinote == "53":
nextsound = sound4
updateScreenAndQueueNextSound()
def updateScreenAndQueueNextSound():
global nextnotethatwillplay
nextnotethatwillplay = mymidinote
reserved_channel_0.queue(nextsound)
if notethatwasplayed == nextnotethatwillplay:
screen.fill(Color("LawnGreen"))
screen.blit(my_font.render("Same Queued",True,Color("Black")),(0,0)
)
if notethatwasplayed != nextnotethatwillplay:
screen.fill(Color("CornflowerBlue"))
screen.blit(my_font.render("Change
Queued",True,Color("White")),(0,0) )
pygame.display.update()
notethatwasplayed = ""
for i in range( pygame.midi.get_count() ):
r = pygame.midi.get_device_info(i)
(interf, name, input, output, opened) = r
in_out = ""
if input:
in_out = "(input)"
if output:
in_out = "(output)"
print ("%2i: interface :%s:, name :%s:, opened :%s: %s" % (i, interf,
name, opened, in_out))
mydevicenumber=raw_input('See list above. Please enter the number for your
midi input device: ')
print "you chose " + mydevicenumber + ''
reserved_channel_0 = pygame.mixer.Channel(0)
my_font = pygame.font.SysFont("Arial",104)
pygame.fastevent.init()
event_get = pygame.fastevent.get
event_post = pygame.fastevent.post
input_id = int(mydevicenumber)
i = pygame.midi.Input( input_id )
TRACK_END = USEREVENT + 1
reserved_channel_0.set_endevent(TRACK_END)
pygame.display.set_caption("BadPenni Loop Sequencer")
screen = pygame.display.set_mode((800, 600), RESIZABLE, 32)
print "starting"
going = True
while going:
events = event_get()
for e in events:
if e.type in [QUIT]:
going = False
if e.type == TRACK_END:
reserved_channel_0.queue(nextsound)
notethatwasplayed = nextnotethatwillplay
screen.fill(Color("LawnGreen"))
screen.blit(my_font.render("Looping",True,Color("Black")),(0,0)
)
pygame.display.update()
if i.poll():
midi_events = i.read(10)
print "full midi_events " + str(midi_events)
print "my midi note is " + str(midi_events[0][0][1])
if str(midi_events[0][0][2]) != "0":
mymidinote = str(midi_events[0][0][1])
print "on event"
if str(midi_events[0][0][2]) == "0":
mymidinote = "0"
print "off event"
assignmidi()
#convert them into pygame events.
midi_evs = pygame.midi.midis2events(midi_events, i.device_id)
for m_e in midi_evs:
event_post( m_e )
del i
exit()
"""
---------------------------------------------------------------------
Installing the Program:
1) Install Pygame. (pygame.org)
2) Copy this file into a folder with sound files.
3) Edit the file to assign the sound files to simples variable at line
11 like this:
sound1 = pygame.mixer.Sound("beat1.wav")
sound2 = pygame.mixer.Sound("beat2.wav")
sound3 = pygame.mixer.Sound("beat3.wav")
sound4 = pygame.mixer.Sound("beat4.wav")
(and so on..)
4) Edit the file to assign the sound files to MIDI note numbers (C=48,
C#=49, D=50 etc) at line 18 like this:
if mymidinote == "48":
nextsound = sound1
updateScreenAndQueueNextSound()
if mymidinote == "50":
nextsound = sound2
updateScreenAndQueueNextSound()
if mymidinote == "52":
nextsound = sound3
updateScreenAndQueueNextSound()
if mymidinote == "53":
nextsound = sound4
updateScreenAndQueueNextSound()
(*Hint watch the spaces in front of the lines, they are important)
---------------------------------------------------------------------
Running the Program:
1) Open a terminal window
2) Change to the folder with the program and sound files
3) Enter this command: python -u badpenni.py
4) This prompt will be displayed:
0: interface :ALSA:, name :Midi Through Port-0:, opened :0: (output)
1: interface :ALSA:, name :Midi Through Port-0:, opened :0: (input)
2: interface :ALSA:, name :Virtual Keyboard:, opened :0: (input)
See list above. Please enter the number for your midi input device:
6) Enter the number from the list for your MIDI device.
7) Play the assigned notes with your MIDI device. The assigned sounds
will play and loop. Newly triggered sounds will be queued to play when the
current loop finishes.
"""
# -------------end badpenni.py file -------------
