Abstract: The invention concerns a method for the program-controlled visually perceivable representation of a music composition on the display of an electronic device. For this purpose, the music composition is reproduced on the display by a multitude of pre-determined 2D and/or 3D-color elements which are equal to the number of tones and/or meters of the music composition and which are configured in each case in such a manner that the background of every color element is formed in a basic color which is assigned to the major or minor key of the tone and/or meter which corresponds to the color element in a special color circle of fifths of the basic colors of all major and minor keys which has twelve colored circular segments 1 to 12 respectively 13 to 24 per semi-circle to which always one major and the corresponding minor key is assigned.

Abstract: The invention concerns a method for the program-controlled visually perceivable representation of a music composition on the display of an electronic device. For this purpose, the music composition is reproduced on the display by a multitude of pre-determined 2D and/or 3D-color elements which are equal to the number of tones and/or meters of the music composition and which are configured in each case in such a manner that the background of every color element is formed in a basic color which is assigned to the major or minor key of the tone and/or meter which corresponds to the color element in a special color circle of fifths of the basic colors of all major and minor keys which has twelve colored circular segments 1 to 12 respectively 13 to 24 per semi-circle to which always one major and the corresponding minor key is assigned.

Abstract: Method of preparing granular quartz glass which comprises heating a porous granulated silica gel having an alkoxy group content equal to or less than 1 weight percent and a total impurity content of less than 1 part per million, the porous granulated silica gel obtained by hydrolysis of an orthosilicic acid ester of an aliphatic alcohol at a temperature up to 1400.degree. C.

Abstract: A process for the preparation of an aqueous alkali metal polysilicate solution having an SiO.sub.2 : alkali metal oxide mole ratio of 2.5 - 5.5 : 1 and a silica content of 16 - 23% by weight which comprises contacting a tetraalkoxysilane of the formula Si(OR).sub.4 wherein each R is independently a straight or branched-chain alkyl group of 1 to 3 carbon atoms with an aqueous alkali metal hydroxide solution at a temperature between room temperature and the boiling point of the reaction mixture and at a temperature up to 100.degree. C. distilling over alcohol formed by the reaction of the silane with the alkali metal hydroxide.

Abstract: Method of preparing granular quartz glass which comprises heating a porous granulated silica gel having an alkoxy group content equal to or less than 1 weight percent and a total impurity content of less than 1 part per million, the porous granulated silica gel obtained by hydrolysis of an orthosilicic acid ester of an aliphatic alcohol at a temperature up to 1400.degree. C.

Abstract: A process for the preparation of an aqueous alkali metal polysilicate solution having an SiO.sub.2 : alkali metal oxide mole ratio of 2.5 - 5.5 : 1 and a silica content of 16 - 23% by weight which comprises contacting a tetraalkoxysilane of the formula Si(OR).sub.4 wherein each R is independently a straight or branched-chain alkyl group of 1 to 3 carbon atoms with an aqueous alkali metal hydroxide solution at a temperature between room temperature and the boiling point of the reaction mixture and at a temperature up to 100.degree.C. distilling over alcohol formed by the reaction of the silane with the alkali metal hydroxide.