multithreading using soundcard about soundcard HOT 6 CLOSED

You are using SoundDevice. This issue board is about SoundCard. These libraries are not the same.

from soundcard.

@mbatt which OS are you using? I use soundcard with mutiprocessing and works very well, nothing special in the setup thou, it's just regular multiprocessing.

from soundcard.

I use windows 10, finally I was able to send tones to differents devices (outputs) of my device in a separate python processes, but I faced a new weird issue.
when I send a tone of 1khz , the frequency is doubled.
I use spectralissime to view the signal it's 2khz.

from soundcard.

Did you set the samplerate? Could you show us a complete code example of what you were trying to do?

from soundcard.

Here is the code
mport sounddevice as sd
import soundfile as sf
import numpy as np
from audio_constants import *
from wasapi_device_index import *

""" create a numpy array from a .wav file"""
def wave2numpy(file):
data,fs = sf.read(file, dtype = 'float32')
return data

def open_output_stream(index):
out_stream = sd.OutputStream( device=index, dtype="float32",channels = 2 )
out_stream.start()
return out_stream

def play_audio_on_channel(audio_data, stream_object):
stream_object.write(audio_data)

"""here i call the function"""
wasapi_exclusive = sd.WasapiSettings(exclusive=True)
play_audio_on_channel(wave2numpy("Tone_750Hz_44100_600s.wav"),open_output_stream(30))

This is my device querry output:
['28', 'FCA1616', 'Line', '7/8', '(Behringer', 'FCA1616', 'WDM),', 'Windows', 'WASAPI', '(0', 'in,', '2', 'out)']
['29', 'FCA1616', 'Line', '1/2', '(Behringer', 'FCA1616', 'WDM),', 'Windows', 'WASAPI', '(0', 'in,', '2', 'out)']
['30', 'FCA1616', 'Line', '3/4', '(Behringer', 'FCA1616', 'WDM),', 'Windows', 'WASAPI', '(0', 'in,', '2', 'out)']
['32', 'FCA1616', 'Line', '5/6', '(Behringer', 'FCA1616', 'WDM),', 'Windows', 'WASAPI', '(0', 'in,', '2', 'out)']

from soundcard.

In the previous code I stream out a 750 Hz tone but it is played as a 1500Hz tone
when I use the play function I get the right frequency

def play_tone(file,channel,loop):
data,fs = sf.read(file,dtype = 'float32')
sd.play(data,fs,loop=loop, blocking = False, device=channel,never_drop_input=None)
status = sd.wait()
sd.stop()

play_tone("Tone_440Hz_44100_600s.wav", 30,False)

from soundcard.