Bridge chord, named after en:Frank Bridge. Minor chord with a major chord a whole tone above. Chord pictured followed by arpeggio with D major at the octave.
A page of sheet music from "Song Stories for the Kindergarten" (1896), the book is in the public domain. The file sourced from https://archive.org/details/SongStoriesForTheKindergarten
Author: Mildred J. Hill (or Jane Taylor) (Life time: June 27, 1859 – June 5, 1916)
It's a sound of jack plug being pushed in. Recorded with a zoom h2 via usb into ardour 2. Edited and converted to flac with ardour. Originally a 48khz/16-bit wav file.
32 bit float pcm2822kbps1. 44mb file sizedecently low noise floorraw, unedited/non-noise filtered. Specifically made from an arizona sweet tea 12 oz. Can.
Just some amplified room noise with a soft and rumbly character. Note: you may hear squeaking sounds or other artifacts in the compressed online preview. The file you download will not have these issues.
Rattle snake hissing or shaking its tail at variable pitches. Recorded with the tascam dr-40 built-in microphones, processed in pro tools 10, bounced to a 48khz 24bit wav file.
C major and E minor contrast through their respective notes C and B (in red and orange), each a half step apart or leading tones. The chords share two notes (in blue) however.