text: import wave
  import numpy as np
  import sys
  
  #usage:
  #python3 txt2wav44k.py dat01.txt
  
  aryArg = sys.argv
  if len(aryArg) > 1:
  	fnamel = aryArg[1]
  else:
  	fnamel ='dat00.txt'
  
  fnames= fnamel[0:-3]+'wav'
  fs=44100/2
  
  strmOrg=np.loadtxt(fnamel)
  N=len(strmOrg)
  timlen=N/fs #sec
  
  strmOrg = strmOrg - np.mean(strmOrg)
  
  factScl = 0.90
  myRms = np.sqrt(np.mean(strmOrg*strmOrg))
  myMax = np.max(np.abs(strmOrg))
  
  #streamNrm = strmOrg / myRms * factScl
  streamNrm = strmOrg / myMax * factScl
  
  streamPeakSup = np.where( streamNrm < 1.0 , streamNrm , 1.0)
  streamPeakSup = np.where( streamPeakSup > -1.0 , streamPeakSup , -1.0)
  streamOut = streamPeakSup
  
  scaleFixedPoint = 32767
  stream= np.int16(streamOut * scaleFixedPoint)
  
  objw = wave.Wave_write(fnames)
  objw.setnchannels(1)
  objw.setsampwidth(2)
  objw.setframerate(fs)
  objw.writeframes(stream)
  objw.close()
  
  #from playsound import playsound
  #playsound(fnames)
  