A sharp ($\sharp$) raises a note by a semitone, and a flat ($\flat$) lowers it by a semitone. The remaining five pitch classes correspond to the black keys of a piano keyboard and are denoted by a combination of a letter and an accidental ($\sharp$, $\flat$). These pitch classes correspond to the white keys of a piano keyboard. Seven of the pitch classes (corresponding to C major)Īre denoted by the letters C, D, E, F, G, A, and B. In Western music notation, these pitch classes are denoted by combining a letter-name and accidentals. In the twelve-tone equal-tempered scale, there are twelve pitch classes. max ( x ) return x, t dur = 1 Fs = 22050 pitches = x, t = generate_sinusoid_pitches ( pitches = pitches, dur = dur, Fs = Fs, amp = 0.5 ) print ( 'Pitch class C = ', flush = True ) ipd. arange ( N ) / Fs x = for p in pitches : freq = 2 ** (( p - 69 ) / 12 ) * 440 x = np. Import numpy as np import IPython.display as ipd def generate_sinusoid_pitches ( pitches =, dur = 0.5, Fs = 4000, amp = 1 ): """Generation of sinusoids for a given list of MIDI pitches Notebook: C1/C1S1_MusicalNotesPitches.ipynb Args: pitches (list): List of MIDI pitches (Default value = ) dur (float): Duration (in seconds) of each sinusoid (Default value = 0.5) Fs (scalar): Sampling rate (Default value = 4000) amp (float): Amplitude of generated signal (Default value = 1) Returns: x (np.ndarray): Signal t (np.ndarray): Time axis (in seconds) """ N = int ( dur * Fs ) t = np.
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