69 lines
2.4 KiB
Python
69 lines
2.4 KiB
Python
"""Settings for audio reactive LED strip"""
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from __future__ import print_function
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from __future__ import division
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import os
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N_PIXELS = 60
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"""Number of pixels in the LED strip (must match ESP8266 firmware)"""
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GAMMA_TABLE_PATH = os.path.join(os.path.dirname(__file__), 'gamma_table.npy')
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"""Location of the gamma correction table"""
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UDP_IP = '192.168.137.150'
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"""IP address of the ESP8266. Must match IP in ws2812_controller.ino"""
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UDP_PORT = 7777
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"""Port number used for socket communication between Python and ESP8266"""
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MIC_RATE = 48000
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"""Sampling frequency of the microphone in Hz"""
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FPS = 60
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"""Desired refresh rate of the visualization (frames per second)
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FPS indicates the desired refresh rate, or frames-per-second, of the audio
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visualization. The actual refresh rate may be lower if the computer cannot keep
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up with desired FPS value.
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Higher framerates improve "responsiveness" and reduce the latency of the
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visualization but are more computationally expensive.
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Low framerates are less computationally expensive, but the visualization may
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appear "sluggish" or out of sync with the audio being played if it is too low.
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The FPS should not exceed the maximum refresh rate of the LED strip, which
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depends on how long the LED strip is.
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"""
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_max_led_FPS = int(((N_PIXELS * 30e-6) + 50e-6)**-1.0)
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assert FPS <= _max_led_FPS, 'FPS must be <= {}'.format(_max_led_FPS)
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MIN_FREQUENCY = 200
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"""Frequencies below this value will be removed during audio processing"""
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MAX_FREQUENCY = 12000
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"""Frequencies above this value will be removed during audio processing"""
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N_FFT_BINS = 30
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"""Number of frequency bins to use when transforming audio to frequency domain
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Fast Fourier transforms are used to transform time-domain audio data to the
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frequency domain. The frequencies present in the audio signal are assigned
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to their respective frequency bins. This value indicates the number of
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frequency bins to use.
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A small number of bins reduces the frequency resolution of the visualization
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but improves amplitude resolution. The opposite is true when using a large
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number of bins.
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There is no point using more bins than there are pixels on the LED strip.
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"""
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GAMMA_CORRECTION = True
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"""Whether to correct LED brightness for nonlinear brightness perception"""
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N_ROLLING_HISTORY = 2
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"""Number of past audio frames to include in the rolling window"""
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MIN_VOLUME_THRESHOLD = 1e-7
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"""No music visualization displayed if recorded audio volume below threshold"""
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