Anonymous asked in Entertainment & MusicMusicOther - Music · 6 months ago

What does a “Q” mean in a chord?

I saw a Chord called, “CQ” (I saw it on a Rick Beato YouTube Music theory video, that he skimmed past in; “How to unlock Melody from Harmony (modern musical composition concepts)”).

I would be very grateful if anyone knew what this meant & could tell me.

Thanks xx

1 Answer

  • 6 months ago
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    A new method for tracking modulations in tonal music in audio data format

    Hendrik Purwins, Benjamin Blankertz, Klaus ObermayerPublished in Proceedings of the IEEE-INNS-ENNS International… 2000


    Cq-profiles are 12-dimensional vectors, each component referring to a pitch class. They can be employed to represent keys. Cq-profiles are calculated with the constant Q filter bank. They have the following advantages:

    1) they correspond to probe tone ratings;

    2) calculation is possible in real-time;

    3) stability is obtained with respect to sound quality; and

    4) they are transposable.

    By using the cq-profile technique as a simple auditory model in combination with the SOM, an arrangement of keys emerges, that resembles results from psychological experiments and from the music theory. Cq-profiles are reliably applied to modulation tracking by introducing a special distance measure.

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