generate 1khz tone at 19khz using BandPass Filter at 192khz sample rate

[veso266]

Hi I would like to generate 1 khz sine wave which I can do fine with this code

import math        #import needed modules
import pyaudio     #sudo apt-get install python-pyaudio


#List I/O Audio ports to use
#Input Device id  0  -  Microsoft Sound Mapper - Input
#Input Device id  1  -  Line 1 (Virtual Audio Cable)
#Input Device id  2  -  Line 4 (Virtual Audio Cable)
#Input Device id  3  -  Line In (Realtek High Definitio
#Input Device id  4  -  Line 2 (Virtual Audio Cable)
#Input Device id  5  -  Microphone (Realtek High Defini
#Input Device id  6  -  Line 3 (Virtual Audio Cable)
#Output Device id  7  -  Microsoft Sound Mapper - Output
#Output Device id  8  -  Speakers (Realtek High Definiti
#Output Device id  9  -  Line 1 (Virtual Audio Cable)
#Output Device id  10  -  Line 3 (Virtual Audio Cable)
#Output Device id  11  -  Line 2 (Virtual Audio Cable)
#Output Device id  12  -  Line 4 (Virtual Audio Cable)


PyAudio = pyaudio.PyAudio     #initialize pyaudio

#See https://en.wikipedia.org/wiki/Bit_rate#Audio
BITRATE = 192000     #number of frames per second/frameset.      

FREQUENCY = 1000     #Hz, waves per second, 261.63=C4-note.
LENGTH = 10     #seconds to play sound

if FREQUENCY > BITRATE:
    BITRATE = FREQUENCY+100

NUMBEROFFRAMES = int(BITRATE * LENGTH)
RESTFRAMES = NUMBEROFFRAMES % BITRATE
WAVEDATA = ''    

#generating wawes
for x in xrange(NUMBEROFFRAMES):
 WAVEDATA = WAVEDATA+chr(int(math.sin(x/((BITRATE/FREQUENCY)/math.pi))*127+128))    

for x in xrange(RESTFRAMES): 
 WAVEDATA = WAVEDATA+chr(128)

p = PyAudio()

#Open Device for streaming
stream = p.open(format = p.get_format_from_width(1), 
                channels = 1, 
                rate = BITRATE, 
                output = True,
				output_device_index=9)

stream.write(WAVEDATA)
stream.stop_stream()
stream.close()
p.terminate()

the problem is that audio is plattered all over 192khz

what I would like to do is move this to 19khz and cut all the junk out of the signal so it would look more like this:

I thought I could acomplish this with audiogen and then play generated samples using pyaudio (since you added bandpass filter) but I don't realy know how would I do this

Thanks for Anwsering and Best Regards