table=do ("Read Table from tab-separated file...", "~/Desktop/pitch22.txt") 
select table
nor=Get number of rows
j=1
p1=0

#################
for i from 1 to nor
select table
if i<nor
 pitch=Get value... i pitch
 start=Get value... i time
 end=Get value... i+1 time
 nextPitch=Get value... i+1 pitch

else
 pitch=Get value... i pitch
 start=Get value... i time
 end=start+0.001
 nextPitch=1000
endif

if ((pitch >0) and (nextPitch>0))

  f1 = pitch
  # f2 = nextPitch
  t1 = start
  t2 = end
  dur=t2-t1
  #a = (f2 - f1) / (t2 -t1)
  #b = f1 - a * t1
  sound'j'=do ("Create Sound from formula..." , "sweep" , 1, 0 , dur , 44100,"0.5*sin(2*pi*f1*x +p1)")
  p1 = (2*pi*f1*dur + p1) mod (2*pi)
  j+=1
endif

  if ((pitch>0)and(nextPitch<0))
     mySilence = Create Sound from formula... silence 1 0 0.2 44100 0
     k=j-1
     select sound'k'
     plus mySilence
     sound'j'=Concatenate
     j+=1
  endif
 



endfor
#####################



select sound1
for i from 2 to j-1
  plus sound'i'
endfor

newSound=Concatenate
select newSound

Save as WAV file... ~/Desktop/newSound.wav