Music-Music Chimeras
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    Music-Music chimeras were synthesized from pairs of melodies consisting of 16 notes of equal duration and amplitude.  Melodies were synthesized with a MIDI piano.  For music-music chimeras synthesized with 1-16 bands, listeners almost always hear the melody having the same fine structure. Only for chimeras synthesized with 64 bands do listeners hear the melody having the same envelope.  Performance is highly variable with 32 bands.  

Comparing music-music chimeras with speech-speech or speech-noise chimeras, it is striking that speech reception depends much more on the envelope, whereas melody recognition depends more on the fine structure.

 

    "Frère Jacques Envelope    "Twinkle" Fine Structure

          “Twinkle” Envelope         "Frère Jacques" Fine Structure

1   Frequency Band

1   Frequency Band

2   Frequency Bands

2   Frequency Bands

4   Frequency Bands

4   Frequency Bands

8   Frequency Bands

8   Frequency Bands

16  Frequency Bands

16  Frequency Bands

32  Frequency Bands

32  Frequency Bands

64  Frequency Bands

64  Frequency Bands