def freq_slider_change(tick):
minf = freq_slider.tickValue(0)**2.0 * (CONFIGS['mic_rate'] / 2.0)
maxf = freq_slider.tickValue(1)**2.0 * (CONFIGS['mic_rate'] / 2.0)
t = 'Frequency range: {:.0f} - {:.0f} Hz'.format(minf, maxf)
freq_label.setText(t)
CONFIGS['min_frequency'] = minf
CONFIGS['max_frequency'] = maxf
dsp.create_mel_bank()
def freq_slider_change(tick):
minf = freq_slider.tickValue(0)**2.0 * (config.MIC_RATE / 2.0)
maxf = freq_slider.tickValue(1)**2.0 * (config.MIC_RATE / 2.0)
t = 'Frequency range: {:.0f} - {:.0f} Hz'.format(minf, maxf)
freq_label.setText(t)
config.MIN_FREQUENCY = minf
config.MAX_FREQUENCY = maxf
dsp.create_mel_bank()
def freq_slider_change(tick):
minf = freq_slider.tickValue(0)**2.0 * (config.MIC_RATE / 2.0)
maxf = freq_slider.tickValue(1)**2.0 * (config.MIC_RATE / 2.0)
t = 'Frequency range: {:.0f} - {:.0f} Hz'.format(minf, maxf)
freq_label.setText(t)
config.MIN_FREQUENCY = minf
config.MAX_FREQUENCY = maxf
dsp.create_mel_bank()
spectrum_label.setText('Spectrum', color=active_color)
# Create effect "buttons" (labels with click event)
energy_label = pg.LabelItem('Energy')
scroll_label = pg.LabelItem('Scroll')
spectrum_label = pg.LabelItem('Spectrum')
energy_label.mousePressEvent = energy_click
scroll_label.mousePressEvent = scroll_click
spectrum_label.mousePressEvent = spectrum_click
energy_click(0)
# Layout
layout.nextRow()
layout.addItem(freq_label, colspan=3)
layout.nextRow()
layout.addItem(freq_slider, colspan=3)
layout.nextRow()
layout.addItem(energy_label)
layout.addItem(scroll_label)
layout.addItem(spectrum_label)
# Initialize LEDs
dsp.create_mel_bank(config)
led.setup(config)
led.update(config)
# Start listening to live audio stream
tmic = threading.Thread(target=microphone.start_stream,
args=(microphone_update, config))
tmic.start()
remote_control.control_loop(config)
tmic.join()
# microphone.start_stream(microphone_update)
def set_freq_max():
config.MAX_FREQUENCY = freq_slider.end()
dsp.create_mel_bank()
def set_freq_min():
config.MIN_FREQUENCY = freq_slider.start()
dsp.create_mel_bank()
args = parser.parse_args()
# Visualization effect to display on the LED strip
vis_type = args.vis_type
if vis_type == "spectrum":
visualization_effect = visualize_spectrum
elif vis_type == "energy":
visualization_effect = visualize_energy
elif vis_type == "scroll":
visualization_effect = visualize_scroll
else:
visualization_effect = visualize_spectrum
# Low pass and high pass filters.
config.MIN_FREQUENCY = args.min_hz
config.MAX_FREQUENCY = args.max_hz
dsp.create_mel_bank()
if config.USE_GUI:
import pyqtgraph as pg
from pyqtgraph.Qt import QtGui, QtCore
# Create GUI window
app = QtGui.QApplication([])
view = pg.GraphicsView()
layout = pg.GraphicsLayout(border=(100, 100, 100))
view.setCentralItem(layout)
view.show()
view.setWindowTitle('Visualization')
view.resize(800, 600)
# Mel filterbank plot
fft_plot = layout.addPlot(title='Filterbank Output', colspan=3)
fft_plot.setRange(yRange=[-0.1, 1.2])
