|
The Chromochord is the first bioelectronic musical instrument. It functions by using the change in absorbance of the ''Avena sativa'' phot1 LOV2 domain (''As''LOV2) and converting this into changes in music. ==Parts== The Chromochord is composed of four main parts: the ''As''LOV2 protein or similar photoactivatable protein, the spectrophotometer that measures absorbance of a solution containing the protein, the keys or buttons that allow for user input and a computer or another device that can create sound. * The ''As''LOV2 protein domain is ~150–175 amino acids in size. It contains a non-covalently bound flavin-mononucleotide (FMN) chromophore that upon absorption of a photon of blue light forms a covalent bound with the sulfur of a nearby cysteine residue and the N5 atom of the isoalloxaxine ring becomes protonated. This reduction of FMN is known to cause of bleaching of the normal absorbance maximum at 447 nm. This reaction spontaneously reverses on the seconds to hours timescale with absorbance returning at 447 nm upon FMN deprotonation and can be repeated many times. The Chromochord contains blue LEDs that can be used to excite the protein. * A spectrophotometer is a device that allows the measurement of optical properties of a sample. The spectrophotometer in the Chromochord is interfaced with a computer to allow signal processing. * The keys and buttons of the Chromochord allow user input to control the sound similar to how a keyboard or piano works. These buttons are interfaced with a computer that can then match the button presses to notes. Each button has a unique sample of protein to allow its pitch to be changed individually. * The computer in the Chromochord does the signal processing and sound generation. Upon a button press the laptop generates a note based on preprogrammed needs from the user. It then uses absorbances measured from the spectrophotometer to modify the pitch of the note. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chromochord」の詳細全文を読む スポンサード リンク
|