

In [ ]:

    
import os, sys
from TimeFreqAuditoryScene import *
from IPython.display import Audio, display, clear_output
from IPython.html import widgets
from IPython.html.widgets import interactive
%matplotlib inline

Generating opponent shifts in inharmonic chord

Two Chords T1,T2 are generated

T1 is inharmonic with random intervals
T2 is build from T1 with various ratios of up or down shifts for individual tones in T1

T1 and T2 share a gaussian spectral envelope



In [ ]:

    
# Parameterization
# Global parameters
fs = 44100
delay = 1./8.
duration = 1./8.
mu_log=np.log(500)
sigma_log=2.
genv = GaussianSpectralEnvelope(mu_log=mu_log, sigma_log=sigma_log)



In [ ]:

    
duration=0.1
delay=0.0
fb = 10.

n_tones = 18
intervals_st = np.random.randint(6,7,n_tones)

def shift_inharmonic(th=0.1):

    # random shift up and down,
    shifts_st = (np.random.rand(n_tones)>th)*2-1

    scene = Scene()
    tone1 = Chord(fb=fb,
                  intervals=2.**(intervals_st/12.),
                  duration=duration,
                  env=genv)
    tone2 = Chord(fb=fb,
                  intervals=2.**((intervals_st)/12.),
                  duration=duration,
                  env=genv,
                  delay=duration+delay)
    tone2.shift_tones(2.**(shifts_st/12.))
    scene.add([tone1,tone2])

    # draw spectrogram
    sd = SceneDrawer()
    sd.draw(scene)
    plt.show()
    # generate sound
    x = scene.generate(fs=fs)
    display(Audio(x, rate=fs, autoplay=True))

w = interactive(shift_inharmonic, th=(0.,1.))
display(w)