Rainbows in my ears - Synesthetic color perception - Flute - French Horn - perceived Color Differences

Rainbows in my ears - Synesthetic color perception with
partial-reduced and morphed musical instrument timbres
Christoph Reuter¹, Jörg Jewanski¹, Sarah Ambros¹, Isabella Czedik-Eysenberg¹, Saleh Siddiq¹, Solange Glasser², Jamie Ward³

¹SInES (Space for Interdisciplinary Experiments on Sound), University of Vienna, Vienna, Austria
²Music Psychology Department, Melbourne Conservatorium of Music, Melbourne, Australia
³School of Psychology, University of Sussex, Brighton, United Kingdom

Perceived color differences (in ΔE) with morphed sounds - Flute ⇔ French Horn

... as seen by best synesthesists (sound on mouseover)

Calculated color differences (in ΔE on the Y-axis) to the induced colors of the initial sound to the morphed sounds in the ratios 10:90, 30:70, 50:50, 70:30, 90:10,
and their trend lines in the two best synesthetes (read orange and blue lines from left to right and green and red lines from right to left).

... as seen by synesthesists (sound on mouseover)

Calculated color differences (in ΔE on the Y-axis) to the induced colors of the initial sound to the morphed sounds in the ratios 10:90, 30:70, 50:50, 70:30, 90:10,
and their trend lines in synesthetes (read orange and blue lines from left to right and green and red lines from right to left).

... as seen by non-synesthesists (sound on mouseover)

Calculated color differences (in ΔE on the Y-axis) to the induced colors of the initial sound to the morphed sounds in the ratios 10:90, 30:70, 50:50, 70:30, 90:10,
and their trend lines in non-synesthetes (read orange and blue lines from left to right and green and red lines from right to left).