Controls volume of different OSS mixers through controller input.

gcmixer.py

import subprocess
import pygame
import time

pygame.joystick.init()
pygame.display.init()

for stick in [pygame.joystick.Joystick(x) for x in range(pygame.joystick.get_count())]:
	stick.init()

MIXERS = {1: {'volume': 25, 'modifier': 0, 'mixer': 'vmix0.pcm10'},
	5: {'volume': 25, 'modifier': 0, 'mixer': 'vmix0.pcm9'}}

def clip(number, start, end):
	"""Returns `number`, but makes sure it's in the range of [start..end]"""
	return max(start, min(number, end))

while 1:
	for event in pygame.event.get():
		if event.type == pygame.QUIT:
			break
		
		if event.type == pygame.JOYAXISMOTION:
			if event.axis in MIXERS:
				MIXERS[event.axis]['modifier'] = -event.value
				
	for mixer in [mixer for mixer in MIXERS.values() if mixer['modifier']]:
		mixer['volume'] = clip(mixer['volume']+mixer['modifier'], 0, 25)
		subprocess.call(['ossmix', mixer['mixer'], str(mixer['volume'])])
	
	time.sleep(0.02)