Emit sounds during typing. sudo python snd.py (list devices) sudo python snd.py /dev/input/<your keyboard> Requires: pip install evdev

snd.py

from __future__ import division
from math import sin
import math
import sys
import wave
import struct
import subprocess
import os
RATE = 44000
snd_i = 0
tmp_dir = os.path.expanduser('~/.kb_snd')
if not os.path.exists(tmp_dir):
    os.mkdir(tmp_dir)
def _play(FREQ, TIME):
    global snd_i
    snd_i += 1
    snd_i %= 10
    path = os.path.expanduser(tmp_dir + '/%d.wav' % snd_i)
    wav = wave.open(path, 'wb')
    wav.setnchannels(1)
    wav.setsampwidth(2)
    wav.setframerate(RATE)
    data = [ math.sin(i/RATE*FREQ) for i in xrange(int(RATE*TIME)) ]
    wav.writeframes(''.join( struct.pack('<h', min(1, max(-1, b))*(2**15-1)) for b in data ))
    wav.close()
    subprocess.Popen(['play', path], stdout=open('/dev/null', 'w'),
                     stderr=subprocess.PIPE)


from evdev import InputDevice, list_devices, ecodes, categorize

if not sys.argv[1:]:
    devices = map(InputDevice, list_devices())
    for dev in devices:
        print( '%-20s %-32s %s' % (dev.fn, dev.name, dev.phys) )
        sys.exit(1)

dev = InputDevice(sys.argv[1])

def play(key):
    freq = 4000 + key * 50
    _play(freq, 0.1)

for event in dev.read_loop():
    if event.type == ecodes.EV_KEY:
        if event.value == 1:
            play(event.code)