On Wed, Jun 26, 2013 at 12:56 PM, Ryan Simpkins <[email protected]>
wrote:
> On Wed, June 26, 2013 09:58, Todd Millecam wrote:
> [snip]
> > 2 33 beep <- I was tuning a piano, lost my kit, tried this as a
> > replacement. Ended up writing a python script instead
> [snip]
>
> Am I the only one wanting to know how you tuned a piano using Python?
> Sounds
> interesting. The Google only returns Monty Python skits when I search
> "python
> piano."
>
> -Ryan
>
since you asked. . . It's not perfect or anything, but works well enough
for me.
#!/usr/bin/env python2
import pygame, numpy, math
duration = 3.0 # in seconds
sample_rate = 44100
bits = 16
n_samples = int(round(duration*sample_rate))
def makeAndPlay(hertz):
try:
pygame.mixer.init(frequency = sample_rate, size = -bits, channels = 2)
buf = numpy.zeros((n_samples, 2), dtype = numpy.int16)
max_sample = 2**(bits - 1) - 1
for s in range(n_samples):
t = float(s)/sample_rate # time in seconds
buf[s][0] = int(round(max_sample*math.sin(2*math.pi*hertz*t)))
buf[s][1] = int(round(max_sample*0.5*math.sin(2*math.pi*hertz*t)))
sound = pygame.sndarray.make_sound(buf)
while True:
try:
sound.play()
except KeyboardInterrupt:
break
except KeyboardInterrupt:
pass
finally:
pygame.mixer.quit()
def main():
while True:
print("enter a frequency: ")
freq = raw_input()
if freq == "q":
break
else:
try:
pitch = notes[freq[0].upper() + freq[1:]]
except:
pitch = float(freq)
makeAndPlay(pitch)
notes = {
"C0" : 16.35,
"C#0" : 17.32,
"Db0" : 17.32,
<trimmed />
}
--
Todd Millecam
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