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51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
# The equalizer class and some audio eq functions are derived from
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# 180093157554388993's work, with his permission
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class Equalizer:
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def __init__(self):
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self._band_count = 15
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self.bands = [0.0 for x in range(self._band_count)]
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def set_gain(self, band: int, gain: float):
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if band < 0 or band >= self._band_count:
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raise IndexError(f"Band {band} does not exist!")
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gain = min(max(gain, -0.25), 1.0)
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self.bands[band] = gain
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def get_gain(self, band: int):
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if band < 0 or band >= self._band_count:
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raise IndexError(f"Band {band} does not exist!")
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return self.bands[band]
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def visualise(self):
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block = ""
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bands = [str(band + 1).zfill(2) for band in range(self._band_count)]
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bottom = (" " * 8) + " ".join(bands)
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gains = [1.0, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, 0.0, -0.1, -0.2, -0.25]
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for gain in gains:
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prefix = " "
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if gain > 0:
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prefix = "+"
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elif gain == 0:
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prefix = " "
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else:
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prefix = ""
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block += f"{prefix}{gain:.2f} | "
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for value in self.bands:
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if value >= gain:
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block += "[] "
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else:
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block += " "
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block += "\n"
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block += bottom
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return block
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