- 20,685
- TenEightyOne
- TenEightyOne
I think that's true only as long as there's a base assumption that all things are equally random. As soon as the non-random parts are clear it's hard to imagine how so many well-educated people continued to disagree with Marilyn for so many years
Definitely. Actually I'd downloaded the image a couple months ago, long before the site hack. And I always verify the checksums.
), i wanted to do something similar. But i haven't got samples and i wanted to do pure python so i came up with synthesizing sounds -- functional style: Look Ma, got no class! Python has generators, so you can build infinite streams of data to iterate over without using infinite memory. I used that to build a crude approximation to a vibraphone sound out of a single sine wave, with added vibrato and tremolo. So without much further ado, here is the script in progress, all you need is to install pyaudio, a library to access the soundcard with python, easily done with pip:python -m pip install pyaudioimport random
import array
import math
import itertools
import pyaudio
import time
def const(c):
return lambda t: c
def sine(f,a,fm=const(0)):
return lambda t: a(t) * math.sin(t * f * 2.0 * math.pi + fm(t))
def lfo(b,f,a):
return lambda t: b + (a * math.sin(t * f * 2.0 * math.pi)/2.0)
def sumgen(gens):
while 1:
sum = 0
dels = []
for i,g in enumerate(gens):
try:
sum += next(g)
except StopIteration:
dels.append(gens[i])
for x in dels:
gens.remove(x)
if dels:
print (len(dels),len(gens))
if not gens:
return
yield sum
def adsrgen(gen,rate,g,a,d,sl,s,r):
for i,v in enumerate(gen):
t = float(i)/rate
if t < a:
yield t/a * g * v
elif t < a + d:
yield (1.0 - (t - a)/d * (1.0 - sl)) * g * v
elif t < a + d + s:
yield sl * g * v
elif t < a + d + s + r:
yield sl * (1.0 - (t - a - d - s)/r) * g * v
else:
raise StopIteration
def clamp(x,bits):
if x > 2**bits/2-1: return int( 2**bits/2-1)
if x < -2**bits/2: return int(-2**bits/2)
return x
def sample(sig,rate):
i = 0
while 1:
yield sig(float(i)/rate)
i += 1
def digitize(smp,bits):
sc = 2**bits/2
while 1:
yield clamp(int(next(smp) * sc), bits)
def pcm(sig,rate,bits):
return digitize(sample(sig,rate),bits)
def taken(g,n):
i = 0
while i < n:
yield next(g)
i += 1
sb=16
sr=44100
sn=44100
tempered=[pow(2,float(i)/12) for i in range(0,12)]
major=[tempered[i] for i in [0,2,4,5,7,9,11]]
minor=[tempered[i] for i in [0,2,3,5,7,8,10]]
minor=[f/2 for f in minor]+minor+[f*2 for f in minor]
arange=(0.2,0.05)
bpm=160
bps=bpm/60.0
spb=1.0/bps
def vibra(f,a,vf,va,tf,ta,maxdur):
return adsrgen(sample(sine(f,lfo(a,tf,a*ta),lfo(0,vf,va)),sr),sr,1,0.001,0.005,0.1,0,maxdur)
gens=[taken(sample(const(0),sr),sr)]
smps=digitize(sumgen(gens),sb)
def snd_output(incoming, frames, time_info, status):
data = array.array('h',taken(smps,frames))
return (data.tostring(), pyaudio.paContinue)
p = pyaudio.PyAudio()
ps = p.open(format=pyaudio.paInt16,
channels=1,
rate=sr,
output=True,
stream_callback=snd_output)
random.seed(1)
i=1
while ps.is_active():
print(i,len(gens),ps.get_cpu_load())
time.sleep(spb)
ntones=random.randrange(3)
if (len(gens) + ntones > 4):
continue
tones=random.sample(minor,ntones)
for f in tones:
a = random.uniform(*arange)
gens.append(vibra(440*f,a/f,3.3,0.9,3.2,1,5))
i += 1
ps.stop_stream()
ps.close()
p.terminate()
No SSD and running on board graphics, whatcha cooking up with this rig?
It's going to be a linux box, running Ubuntu 14.04 LTE with the Trinity Desktop Environment. It's actually intended to replace a ten-year-old Pentium 4 system. Seems to me that SSD's really only shine when booting and since this machine will essentially be running 24/7 I don't see much of a benefit. Similarly for the video -- this is hardly a gaming rig; watching games on mlb.mlb.com and the occasional youtube video and maybe a movie streamed from Amazon is about the limit of what I'll be doing. So I don't need any heavy duty video hardware pumping more heat into the room in the summer. Come next winter I may reconsider
I hear a Titian and a 9k series AMD CPU does wonders for the heat bill!It's going to be a linux box, running Ubuntu 14.04 LTE with the Trinity Desktop Environment. It's actually intended to replace a ten-year-old Pentium 4 system. Seems to me that SSD's really only shine when booting and since this machine will essentially be running 24/7 I don't see much of a benefit. Similarly for the video -- this is hardly a gaming rig; watching games on mlb.mlb.com and the occasional youtube video and maybe a movie streamed from Amazon is about the limit of what I'll be doing. So I don't need any heavy duty video hardware pumping more heat into the room in the summer. Come next winter I may reconsider
Earlier this week I indulged myself with a NZXT HUE+ highly customizable led lighting kit for my pc. This is a short clip of it in action straight from my living room....
And a few pics of my two fav fixed colours....7f1ae5 & 76b900
View attachment 522517 View attachment 522518
Also this week I have won the Rookie Rumble 28 OC competition at http://hwbot.org/ and as such should soon be a proud 1st prize winning owner of a nice kit of G.SKILL TRIDENT Z DDR4 16GB (F4-3000C14-16GTZ)
, I like it, but it really is freaking huge. Next to it is my old rig. In the already huge Antec 902 case.... Peak temp never got over 33°C (OCCT 4.4.1 was the software) ) 880 avr.
...and that "near future" is now. Well, soon; it's in the mail. I'd installed VirtualBox and set up a couple VMs. I was so impressed with how well it performed that I figured I might as well increase the VM capacity now.
