| 1 |
import numpy as np |
| 2 |
import os |
| 3 |
import re |
| 4 |
import drms |
| 5 |
from astropy.io import fits |
| 6 |
from urllib.request import urlretrieve |
| 7 |
import soundfile as sf |
| 8 |
from scipy import fftpack |
| 9 |
|
| 10 |
import warnings |
| 11 |
warnings.simplefilter(action='ignore', category=FutureWarning) |
| 12 |
|
| 13 |
#datadir = '/home/tplarson/solar/data' |
| 14 |
datadir = '../data' |
| 15 |
|
| 16 |
def getmodeparms(instrument=None, day=None, lmin=0, lmax=300, makemsplit=True): |
| 17 |
|
| 18 |
if not os.path.exists(datadir): |
| 19 |
os.makedirs(datadir) |
| 20 |
|
| 21 |
if (instrument == None): |
| 22 |
inst=input("Enter name of instrument: ") |
| 23 |
else: |
| 24 |
inst=instrument |
| 25 |
|
| 26 |
if (day == None): |
| 27 |
daystr=input("Enter day number: ") |
| 28 |
else: |
| 29 |
daystr=str(day) |
| 30 |
|
| 31 |
mfile=getmfile(inst.lower(), daystr) |
| 32 |
if (mfile == None): |
| 33 |
return None |
| 34 |
|
| 35 |
if (makemsplit): |
| 36 |
msfile=mfile+'.msplit' |
| 37 |
|
| 38 |
if os.path.exists(msfile): |
| 39 |
print("Msplit file already exists.") |
| 40 |
else: |
| 41 |
msfile=mkmsplit(mfile,lmin=lmin,lmax=lmax) |
| 42 |
|
| 43 |
return mfile,msfile |
| 44 |
else: |
| 45 |
return mfile |
| 46 |
|
| 47 |
|
| 48 |
def getmfile(inst, daystr): |
| 49 |
|
| 50 |
if (inst == 'hmi'): |
| 51 |
qblank = 'hmi.V_sht_modes[{:d}d][0][300][138240]' |
| 52 |
avgurl = 'http://sun.stanford.edu/~tplarson/audio/HMI/hmi.average.modes' |
| 53 |
elif (inst == 'mdi'): |
| 54 |
qblank = 'mdi.vw_V_sht_modes[{:d}d][0][300][103680]' |
| 55 |
avgurl = 'http://sun.stanford.edu/~tplarson/audio/MDI/mdi.average.modes' |
| 56 |
else: |
| 57 |
print("Invalid instrument, try again.") |
| 58 |
return None |
| 59 |
|
| 60 |
if (daystr == 'average'): |
| 61 |
mblank = '%s.average.modes' |
| 62 |
mfile=os.path.join(datadir,mblank % inst) |
| 63 |
if os.path.exists(mfile): |
| 64 |
print("Mode fits file already exists.") |
| 65 |
else: |
| 66 |
try: |
| 67 |
urlretrieve(avgurl, mfile) |
| 68 |
except: |
| 69 |
print("Failure of urlretrieve() for %s." % avgurl) |
| 70 |
return None |
| 71 |
else: |
| 72 |
mblank = '%s.%sd.modes' |
| 73 |
mfile=os.path.join(datadir,mblank % (inst, daystr)) |
| 74 |
if os.path.exists(mfile): |
| 75 |
print("Mode fits file already exists.") |
| 76 |
else: |
| 77 |
try: |
| 78 |
day=int(daystr) |
| 79 |
except: |
| 80 |
print("Invalid number, try again.") |
| 81 |
return None |
| 82 |
qstr=qblank.format(day) |
| 83 |
c = drms.Client() |
| 84 |
m = c.query(qstr, seg='m6') |
| 85 |
if (len(m) == 0): |
| 86 |
print("No data found for that day number, try again.") |
| 87 |
return None |
| 88 |
url = 'http://jsoc.stanford.edu' + m.m6[0] |
| 89 |
try: |
| 90 |
urlretrieve(url, mfile) |
| 91 |
except: |
| 92 |
print("Failure of urlretrieve() for %s." % url) |
| 93 |
return None |
| 94 |
|
| 95 |
return mfile |
| 96 |
|
| 97 |
|
| 98 |
def mkmsplit(mfile, lmin=0, lmax=300): |
| 99 |
|
| 100 |
modeparms=np.loadtxt(mfile) |
| 101 |
lmod=modeparms[:,0] |
| 102 |
nmod=modeparms[:,1] |
| 103 |
|
| 104 |
outfmt='{:d} {:d} {:d} {:f} {:f}' |
| 105 |
outfile = mfile + '.msplit' |
| 106 |
file=open(outfile,'w') |
| 107 |
|
| 108 |
l=lmin |
| 109 |
while (l <= lmax): |
| 110 |
pols=apols(l,6) |
| 111 |
ind = (lmod == l) |
| 112 |
nlist = nmod[ind] |
| 113 |
for n in nlist: |
| 114 |
ind2 = (lmod == l) & (nmod == n) |
| 115 |
ai=np.append([0.0],modeparms[ind2,12:18]/1000) |
| 116 |
ei=np.append([0.0],modeparms[ind2,18:24]/1000) |
| 117 |
fx=np.matmul(pols,ai) |
| 118 |
freq=modeparms[ind2,2]+fx |
| 119 |
var=np.matmul((pols*pols),(ei*ei)) |
| 120 |
sig=modeparms[ind2,7]+np.sqrt(var) |
| 121 |
for m in range(-l,l+1): |
| 122 |
outstr=outfmt.format(int(l),int(n),int(m),freq[m+l],sig[m+l]) |
| 123 |
file.write('%s\n' % (outstr)) |
| 124 |
l+=1 |
| 125 |
file.close() |
| 126 |
return outfile |
| 127 |
|
| 128 |
|
| 129 |
def getwavfiles(instrument=None, day=None, l=None, m=None, delfits=False): |
| 130 |
|
| 131 |
if not os.path.exists(datadir): |
| 132 |
os.makedirs(datadir) |
| 133 |
|
| 134 |
if (instrument == None): |
| 135 |
inst=input("Enter name of instrument: ") |
| 136 |
else: |
| 137 |
inst=instrument |
| 138 |
|
| 139 |
if (inst.lower() == 'hmi'): |
| 140 |
hind=1 |
| 141 |
elif (inst.lower() == 'mdi'): |
| 142 |
hind=0 |
| 143 |
else: |
| 144 |
print("Invalid instrument, try again.") |
| 145 |
return None |
| 146 |
|
| 147 |
if (day == None): |
| 148 |
daystr=input("Enter day number: ") |
| 149 |
try: |
| 150 |
day=int(daystr) |
| 151 |
except: |
| 152 |
print("Invalid number, try again.") |
| 153 |
return None |
| 154 |
if (l == None): |
| 155 |
lstr=input("Enter spherical harmonic degree: ") |
| 156 |
try: |
| 157 |
l=int(lstr) |
| 158 |
except: |
| 159 |
print("Invalid number, try again.") |
| 160 |
return None |
| 161 |
if (m == None): |
| 162 |
mstr=input("Enter azimuthal order: ") |
| 163 |
try: |
| 164 |
m=int(mstr) |
| 165 |
m=np.abs(m) |
| 166 |
if (m > l): |
| 167 |
print("Abs(m) must be less than l, try again.") |
| 168 |
return None |
| 169 |
except: |
| 170 |
print("Invalid number, try again.") |
| 171 |
return None |
| 172 |
|
| 173 |
wblank = '%s.%id_72d.l=%i_m=%i_data%s.wav' |
| 174 |
wfile=os.path.join(datadir,wblank % (inst.lower(),day,l,m,'r')) |
| 175 |
wfile2=os.path.join(datadir,wblank % (inst.lower(),day,l,m,'i')) |
| 176 |
if os.path.exists(wfile) and (m==0 or os.path.exists(wfile2)): |
| 177 |
if (m == 0): |
| 178 |
print("Wav file already exists.") |
| 179 |
return wfile |
| 180 |
else: |
| 181 |
print("Wav files already exists.") |
| 182 |
return wfile,wfile2 |
| 183 |
|
| 184 |
ffile=getfitsfile(inst.lower(),day,l) |
| 185 |
if (ffile == None): |
| 186 |
return None |
| 187 |
|
| 188 |
wf=convertfitstowav(ffile, hind, m, wfile) |
| 189 |
if (wf == None): |
| 190 |
return None |
| 191 |
|
| 192 |
if delfits: |
| 193 |
os.remove(ffile) |
| 194 |
return wf |
| 195 |
|
| 196 |
|
| 197 |
def getfitsfile(inst, day, l): |
| 198 |
|
| 199 |
if (inst == 'hmi'): |
| 200 |
qblank = 'hmi.V_sht_gf_72d[{:d}d][{:d}][{:d}][138240]' |
| 201 |
elif (inst == 'mdi'): |
| 202 |
qblank = 'mdi.vw_V_sht_gf_72d[{:d}d][{:d}][{:d}][103680]' |
| 203 |
else: |
| 204 |
print("Invalid instrument, try again.") |
| 205 |
return None |
| 206 |
|
| 207 |
fblank='%s.%id.%i.fits' |
| 208 |
ffile=os.path.join(datadir,fblank % (inst,day,l)) |
| 209 |
if os.path.exists(ffile): |
| 210 |
print("Fits file already exists.") |
| 211 |
else: |
| 212 |
qstr=qblank.format(day,l,l) |
| 213 |
c = drms.Client() |
| 214 |
f = c.query(qstr,seg='data') |
| 215 |
if (len(f) == 0): |
| 216 |
print("No data found for that day number and degree, try again.") |
| 217 |
return None |
| 218 |
url = 'http://jsoc.stanford.edu' + f.data[0] |
| 219 |
try: |
| 220 |
urlretrieve(url, ffile) |
| 221 |
except: |
| 222 |
print("Failure of urlretrieve() for %s." % url) |
| 223 |
return None |
| 224 |
|
| 225 |
return ffile |
| 226 |
|
| 227 |
|
| 228 |
def convertfitstowav(ffile, hind, m, wfile): |
| 229 |
|
| 230 |
hdul = fits.open(ffile) |
| 231 |
h=hdul[hind] |
| 232 |
d=h.data |
| 233 |
x=d[m,0::2]/np.abs(d[m,:]).max() |
| 234 |
sf.write(wfile, x, 8000, subtype='FLOAT') |
| 235 |
|
| 236 |
if (m > 0): |
| 237 |
wfile2=wfile.replace('datar','datai') |
| 238 |
x=d[m,1::2]/np.abs(d[m,:]).max() |
| 239 |
sf.write(wfile2, x, 8000, subtype='FLOAT') |
| 240 |
|
| 241 |
hdul.close() |
| 242 |
if (m==0): |
| 243 |
return wfile |
| 244 |
else: |
| 245 |
return wfile,wfile2 |
| 246 |
|
| 247 |
|
| 248 |
def apols(lin, amaxin): |
| 249 |
|
| 250 |
# adapted from IDL procedure apols.pro written by Jesper Schou |
| 251 |
|
| 252 |
l=np.long(lin) |
| 253 |
amax=np.minimum(amaxin,2*l) |
| 254 |
|
| 255 |
pols=np.zeros((2*l+1,amaxin+1)) |
| 256 |
# It is ESSENTIAL that x is set up such that x(-m)=-x(m) to full machine |
| 257 |
# accuracy or that the re-orthogonalization is done with respect to all |
| 258 |
# previous polynomials (second option below). |
| 259 |
# x=(dindgen(2*l+1)-l)/l |
| 260 |
x=np.linspace(-1,1,2*l+1) |
| 261 |
|
| 262 |
pols[:,0]=1/np.sqrt(2*l+1.0) |
| 263 |
if (amax >= 1): |
| 264 |
pols[:,1]=x/np.sqrt((l+1.0)*(2*l+1.0)/(3.0*l)) |
| 265 |
# for n=2l,amax do begin |
| 266 |
# Set up polynomials using exact recurrence relation. |
| 267 |
for n in range(2,amax+1): |
| 268 |
a0=2.0*l*(2*n-1.0)/(n*(2*l-n+1)) |
| 269 |
b0=-(n-1.0)/n*(2*l+n)/(2*l-n+1) |
| 270 |
a=a0*np.sqrt((2*n+1.0)/(2*n-1.0)*(2*l-n+1.0)/(2*l+n+1.0)) |
| 271 |
b=b0*np.sqrt((2*n+1.0)/(2*n-3.0)*(2*l-n+1.0)*(2*l-n+2.0)/(2*l+n+1.0)/(2*l+n)) |
| 272 |
help=a*x*pols[:,n-1]+b*pols[:,n-2] |
| 273 |
# Turns out that roundoff kills the algorithm, so we have to re-orthogonalize. |
| 274 |
# Two choices here. First one is twice as fast and more accurate, but |
| 275 |
# depends on the rounding being done in the standard IEEE way. |
| 276 |
# for j=n-2,0,-2 do begin |
| 277 |
for j in range(n-2,-1,-2): |
| 278 |
# This choice is robust to the roundoff, but twice as slow and generally |
| 279 |
# somewhat less accurate |
| 280 |
# for j=n-1,0,-1 do begin |
| 281 |
help=help-pols[:,j]*np.sum(help*pols[:,j]) |
| 282 |
# end |
| 283 |
# Reset norm to 1. |
| 284 |
pols[:,n]=help/np.sqrt(np.sum(np.square(help))) |
| 285 |
|
| 286 |
# Reset polynomials to have P_l(l)=l by setting overall norm. |
| 287 |
# Note that this results in more accurate overall normalization, but |
| 288 |
# that P_l(l) may be very far from l. This is the key to the algorithm. |
| 289 |
c=l**2*(2*l+1.0) |
| 290 |
# for n=0l,amax do begin |
| 291 |
for n in range(0,amax+1): |
| 292 |
c=c*(2*l+n+1.0)/(2*l-n+1.0) |
| 293 |
pols[:,n]=pols[:,n]*np.sqrt(c/(2*n+1)) |
| 294 |
|
| 295 |
return pols |
| 296 |
|
| 297 |
|
| 298 |
def splitwavfile(wavfile=None, splitfactor=2, splitboth=True): |
| 299 |
|
| 300 |
wblank = '%s.%id_%id.l=%i_m=%i_data%s.wav' |
| 301 |
outlist=[] |
| 302 |
|
| 303 |
if (wavfile == None): |
| 304 |
inst=input("Enter name of instrument: ") |
| 305 |
inst=inst.lower() |
| 306 |
if (inst != 'mdi' and inst != 'hmi'): |
| 307 |
print("Invalid instrument, try again.") |
| 308 |
return None |
| 309 |
daystr=input("Enter day number: ") |
| 310 |
try: |
| 311 |
firstday=int(daystr) |
| 312 |
except: |
| 313 |
print("Invalid number, try again.") |
| 314 |
return None |
| 315 |
ndstr=input("Enter number of days: ") |
| 316 |
try: |
| 317 |
ndaysin=int(ndstr) |
| 318 |
except: |
| 319 |
print("Invalid number, try again.") |
| 320 |
return None |
| 321 |
lstr=input("Enter spherical harmonic degree: ") |
| 322 |
try: |
| 323 |
l=int(lstr) |
| 324 |
if (l < 0): |
| 325 |
print("Degree l must be nonnegative, try again.") |
| 326 |
return None |
| 327 |
except: |
| 328 |
print("Invalid number, try again.") |
| 329 |
return None |
| 330 |
mstr=input("Enter azimuthal order: ") |
| 331 |
try: |
| 332 |
m=int(mstr) |
| 333 |
m=np.abs(m) |
| 334 |
if (m > l): |
| 335 |
print("Abs(m) must be less than l, try again.") |
| 336 |
return None |
| 337 |
except: |
| 338 |
print("Invalid number, try again.") |
| 339 |
return None |
| 340 |
ri='r' |
| 341 |
wavfile=os.path.join(datadir,wblank % (inst,firstday,ndaysin,l,m,ri)) |
| 342 |
else: |
| 343 |
regmatch = re.search(r"(\S+)\.(\d+)d_(\d+)d\.l=(\d+)_m=(\d+)_data(\S+).wav", wavfile) |
| 344 |
if (regmatch == None): |
| 345 |
print("Invalid file name, try again.") |
| 346 |
return None |
| 347 |
else: |
| 348 |
inst=regmatch.group(1) |
| 349 |
firstday=int(regmatch.group(2)) |
| 350 |
ndaysin=int(regmatch.group(3)) |
| 351 |
l=int(regmatch.group(4)) |
| 352 |
m=int(regmatch.group(5)) |
| 353 |
ri=regmatch.group(6) |
| 354 |
|
| 355 |
test= ndaysin % splitfactor |
| 356 |
if (test != 0): |
| 357 |
print("Timeseries not divisible by that factor.") |
| 358 |
return None |
| 359 |
|
| 360 |
# wfile = os.path.join(datadir,wavfile) |
| 361 |
try: |
| 362 |
x, sr = sf.read(wavfile) |
| 363 |
except: |
| 364 |
print("Invalid file, try again.") |
| 365 |
return None |
| 366 |
|
| 367 |
if (inst == 'mdi'): |
| 368 |
nperday = 1440 |
| 369 |
elif (inst == 'hmi'): |
| 370 |
nperday = 1920 |
| 371 |
|
| 372 |
ndaysout = ndaysin / splitfactor |
| 373 |
ndt=int(ndaysout*nperday) |
| 374 |
day = firstday |
| 375 |
index=0 |
| 376 |
while (day < firstday+ndaysin): |
| 377 |
xout=x[index:index+ndt] |
| 378 |
wfileout = os.path.join(datadir,wblank % (inst,day,ndaysout,l,m,ri)) |
| 379 |
sf.write(wfileout, xout, sr, subtype='FLOAT') |
| 380 |
day += ndaysout |
| 381 |
index += ndt |
| 382 |
outlist.append(wfileout) |
| 383 |
|
| 384 |
if (splitboth and m > 0): |
| 385 |
if (ri == 'i'): |
| 386 |
ir = 'r' |
| 387 |
elif (ri == 'r'): |
| 388 |
ir = 'i' |
| 389 |
wfile=wblank % (inst,firstday,ndaysin,l,m,ir) |
| 390 |
wavfile = os.path.join(datadir,wfile) |
| 391 |
try: |
| 392 |
x, sr = sf.read(wavfile) |
| 393 |
except: |
| 394 |
print("Invalid file, try again.") |
| 395 |
return None |
| 396 |
day=firstday |
| 397 |
index=0 |
| 398 |
while (day < firstday+ndaysin): |
| 399 |
xout=x[index:index+ndt] |
| 400 |
wfileout = os.path.join(datadir,wblank % (inst,day,ndaysout,l,m,ir)) |
| 401 |
sf.write(wfileout, xout, sr, subtype='FLOAT') |
| 402 |
day += ndaysout |
| 403 |
index += ndt |
| 404 |
outlist.append(wfileout) |
| 405 |
|
| 406 |
return outlist |
| 407 |
|
| 408 |
|
| 409 |
def scanspectrum(wavfile=None,downshift=4,firstbin=None,lastbin=None,nbins=200,ndt=10000,binstep=None,ramp=50): |
| 410 |
|
| 411 |
if (binstep == None): |
| 412 |
binstep = int(nbins/2) |
| 413 |
|
| 414 |
wblank = '%s.%id_%id.l=%i_m=%i_data%s.wav' |
| 415 |
if (wavfile == None): |
| 416 |
inst=input("Enter name of instrument: ") |
| 417 |
inst=inst.lower() |
| 418 |
if (inst != 'mdi' and inst != 'hmi'): |
| 419 |
print("Invalid instrument, try again.") |
| 420 |
return None |
| 421 |
daystr=input("Enter day number: ") |
| 422 |
try: |
| 423 |
firstday=int(daystr) |
| 424 |
except: |
| 425 |
print("Invalid number, try again.") |
| 426 |
return None |
| 427 |
ndstr=input("Enter number of days: ") |
| 428 |
try: |
| 429 |
ndaysin=int(ndstr) |
| 430 |
except: |
| 431 |
print("Invalid number, try again.") |
| 432 |
return None |
| 433 |
lstr=input("Enter spherical harmonic degree: ") |
| 434 |
try: |
| 435 |
l=int(lstr) |
| 436 |
if (l < 0): |
| 437 |
print("Degree l must be nonnegative, try again.") |
| 438 |
return None |
| 439 |
except: |
| 440 |
print("Invalid number, try again.") |
| 441 |
return None |
| 442 |
mstr=input("Enter azimuthal order: ") |
| 443 |
try: |
| 444 |
m=int(mstr) |
| 445 |
m=np.abs(m) |
| 446 |
if (m > l): |
| 447 |
print("Abs(m) must be less than l, try again.") |
| 448 |
return None |
| 449 |
except: |
| 450 |
print("Invalid number, try again.") |
| 451 |
return None |
| 452 |
ri='r' |
| 453 |
wavfile=os.path.join(datadir,wblank % (inst,firstday,ndaysin,l,m,ri)) |
| 454 |
print("Wav file is %s" % wavfile) |
| 455 |
else: |
| 456 |
regmatch = re.search(r"(\S+)\.(\d+)d_(\d+)d\.l=(\d+)_m=(\d+)_data(\S+).wav", wavfile) |
| 457 |
if (regmatch == None): |
| 458 |
print("Invalid file name, try again.") |
| 459 |
return None |
| 460 |
else: |
| 461 |
inst=regmatch.group(1) |
| 462 |
firstday=int(regmatch.group(2)) |
| 463 |
ndaysin=int(regmatch.group(3)) |
| 464 |
l=int(regmatch.group(4)) |
| 465 |
m=int(regmatch.group(5)) |
| 466 |
ri=regmatch.group(6) |
| 467 |
|
| 468 |
try: |
| 469 |
x, sr = sf.read(wavfile) |
| 470 |
except: |
| 471 |
print("Invalid file, try again.") |
| 472 |
return None |
| 473 |
|
| 474 |
z=np.zeros((len(x)),dtype=np.complex_) |
| 475 |
if (ri == 'r'): |
| 476 |
z.real=x |
| 477 |
else: |
| 478 |
z.imag=x |
| 479 |
|
| 480 |
if (m > 0): |
| 481 |
if (ri == 'i'): |
| 482 |
ir = 'r' |
| 483 |
elif (ri == 'r'): |
| 484 |
ir = 'i' |
| 485 |
wfile=wblank % (inst,firstday,ndaysin,l,m,ir) |
| 486 |
wavfile = os.path.join(datadir,wfile) |
| 487 |
try: |
| 488 |
x, sr = sf.read(wavfile) |
| 489 |
except: |
| 490 |
print("Invalid file, try again.") |
| 491 |
return None |
| 492 |
else: |
| 493 |
x=0.0*x |
| 494 |
|
| 495 |
if (ri == 'r'): |
| 496 |
z.imag=x |
| 497 |
else: |
| 498 |
z.real=x |
| 499 |
|
| 500 |
window=np.ones(ndt) |
| 501 |
if (ramp != 0): |
| 502 |
rampsamples=int(sr*ramp/1000) |
| 503 |
if (rampsamples > ndt/2): |
| 504 |
print("Ramp longer than ndt/2, try again.") |
| 505 |
return None |
| 506 |
window[0:rampsamples]=np.linspace(0.0,1.0,rampsamples,endpoint=False) |
| 507 |
window[ndt-1:ndt-rampsamples-1:-1]=np.linspace(0.0,1.0,rampsamples,endpoint=False) |
| 508 |
|
| 509 |
nx=len(x) |
| 510 |
nx2=int(nx/2) |
| 511 |
if (firstbin == None): |
| 512 |
firstbin = int(nx2/6) |
| 513 |
if (lastbin == None): |
| 514 |
lastbin = int(0.9*nx2) |
| 515 |
ftz = fftpack.fft(z) |
| 516 |
freq = fftpack.fftfreq(nx) #*sr |
| 517 |
if (m >= 0): |
| 518 |
mag = np.abs(ftz[0:nx2]) |
| 519 |
phase = np.arctan2(ftz[0:nx2].imag,ftz[0:nx2].real) |
| 520 |
f = freq[0:nx2]/downshift |
| 521 |
else: |
| 522 |
mag = np.abs(ftz[nx:nx2:-1]) |
| 523 |
phase = np.arctan2(-1*ftz[nx:nx2:-1].imag,ftz[nx:nx2:-1].real) |
| 524 |
f = -1*freq[nx:nx2:-1]/downshift |
| 525 |
|
| 526 |
nstep=int((lastbin-firstbin)/binstep) |
| 527 |
tlen=nstep*ndt |
| 528 |
t=np.linspace(0,ndt-1,ndt) |
| 529 |
xout=np.zeros((tlen)) |
| 530 |
bindex=firstbin |
| 531 |
tindex=0 |
| 532 |
t0in=0 |
| 533 |
while (bindex + nbins <= lastbin): |
| 534 |
for i in range(nbins): |
| 535 |
xout[tindex:tindex+ndt]+=mag[bindex+i]*np.sin(2*np.pi*f[bindex+i]*(t+tindex)+phase[bindex+i]) |
| 536 |
xout[tindex:tindex+ndt]*=window |
| 537 |
bindex+=binstep |
| 538 |
tindex+=ndt |
| 539 |
|
| 540 |
mx=np.abs(xout).max() |
| 541 |
xout /= mx |
| 542 |
sf.write('output.wav', xout, sr, subtype='FLOAT') |
| 543 |
|
| 544 |
return xout |
| 545 |
|
| 546 |
|
| 547 |
#def plotspectrum(wavfile): |
| 548 |
# x, sr = sf.read(wavfile) |
| 549 |
# ftx = fftpack.fft(x) |
| 550 |
# freqs = fftpack.fftfreq(len(x)) * sr |
| 551 |
|
| 552 |
|
