66 lines
1.5 KiB
Python
Executable File
66 lines
1.5 KiB
Python
Executable File
#!/usr/bin/python3
|
|
import argparse
|
|
import numpy as np
|
|
|
|
|
|
parser = argparse.ArgumentParser(
|
|
description='Play a sine wave'
|
|
)
|
|
device_help = 'DAQ Device to play to'
|
|
parser.add_argument('--device', '-d', help=device_help, type=str,
|
|
default='Default')
|
|
|
|
args = parser.parse_args()
|
|
|
|
from lasp.lasp_avstream import AvStream, AvType
|
|
from lasp.device import DAQConfiguration, RtAudio
|
|
|
|
config = DAQConfiguration.loadConfigs()[args.device]
|
|
|
|
rtaudio = RtAudio()
|
|
devices = rtaudio.getDeviceInfo()
|
|
|
|
output_devices = {}
|
|
for device in devices:
|
|
if device.outputchannels >= 0:
|
|
output_devices[device.name] = device
|
|
|
|
try:
|
|
output_device = output_devices[config.output_device_name]
|
|
except KeyError:
|
|
raise RuntimeError(f'output device {config.output_device_name} not available')
|
|
|
|
samplerate = int(config.en_output_rate)
|
|
stream = AvStream(output_device,
|
|
AvType.audio_output,
|
|
config)
|
|
|
|
# freq = 440.
|
|
freq = 1000.
|
|
omg = 2*np.pi*freq
|
|
|
|
|
|
def mycallback(indata, outdata, blockctr):
|
|
frames = outdata.shape[0]
|
|
nchannels = outdata.shape[1]
|
|
# nchannels = 1
|
|
streamtime = blockctr*frames/samplerate
|
|
t = np.linspace(streamtime, streamtime + frames/samplerate,
|
|
frames)[np.newaxis, :]
|
|
outp = 0.01*np.sin(omg*t)
|
|
for i in range(nchannels):
|
|
outdata[:,i] = ((2**16-1)*outp).astype(np.int16)
|
|
|
|
stream.addCallback(mycallback, AvType.audio_output)
|
|
stream.start()
|
|
|
|
input()
|
|
|
|
print('Stopping stream...')
|
|
stream.stop()
|
|
|
|
print('Stream stopped')
|
|
print('Closing stream...')
|
|
stream.close()
|
|
print('Stream closed')
|