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A metal shell and metal inserts of an acoustic drum. In some examples, an acoustic drum having a metal shell can include one or more metal inserts configured to control the tone of the drum. In some configurations, the one or more inserts can form a portion of a bearing edge at one or more openings

A metal shell and metal inserts of an acoustic drum. In some examples, an acoustic drum having a metal shell can include one or more metal inserts configured to control the tone of the drum. In some configurations, the one or more inserts can form a portion of a bearing edge at one or more openings of the shell. Moreover, in some examples the inserts can be fitted to be in contact with the shell. The shape and configuration of the metal inserts can therefore control and refine the tone of the drum, allowing, for example, a drum with a metal shell to have a tone resembling that of a wooden drum with the sensitivity and power of a metal drum.

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1. An element of an acoustic drum comprising: a hollow cylindrical shell formed of a first metal, wherein the shell has a first radius extending perpendicular to a first dimension and the shell includes a top edge at a top opening; andan insert formed of a second metal comprising a plurality of inse

1. An element of an acoustic drum comprising: a hollow cylindrical shell formed of a first metal, wherein the shell has a first radius extending perpendicular to a first dimension and the shell includes a top edge at a top opening; andan insert formed of a second metal comprising a plurality of insert sections, wherein the plurality of insert sections collectively form a discontinuous ring, wherein the insert has a curve of the first radius, and the insert is fastened to the shell such that the insert is further from the top opening than the top edge of the shell in the first dimension. 2. The element of claim 1, wherein: the top edge of the shell includes an inner shell edge; andthe insert includes an insert edge such that the inner shell edge and insert edge together form a continuous inner edge. 3. The element of claim 2, wherein: the top edge of the shell includes an outer edge, the outer edge and inner edge together forming a bearing edge of the element. 4. The element of claim 1 further comprising a second insert, wherein: the shell further includes a bottom opening having a bottom edge; andthe second insert is positioned further from the bottom opening than the bottom edge in the first dimension. 5. The element of claim 1, wherein: the plurality of insert sections are separated by distances of at least one millimeter. 6. The element of claim 1, wherein the first metal is different from the second metal. 7. An element of an acoustic drum comprising: a hollow cylindrical shell formed of a first metal, wherein the shell has a first radius extending perpendicular to a first dimension and the shell includes a top edge at a top opening; andan insert formed of a second metal, wherein the insert has a curve of the first radius, and the insert is fastened to the shell through a plurality of holes and each hole is elongated as to allow the insert to be adjusted in the first dimension such that the insert is further from the top opening than the top edge of the shell in the first dimension. 8. The element of claim 7, wherein: the top edge of the shell includes an inner shell edge; andthe insert includes an insert edge such that the inner shell edge and insert edge together form a continuous inner edge. 9. The element of claim 8, wherein: the top edge of the shell includes an outer edge, the outer edge and inner edge together forming a bearing edge of the element. 10. The element of claim 7, further comprising a second insert, wherein: the shell further includes a bottom opening having a bottom edge; andthe second insert is positioned further from the bottom opening than the bottom edge in the first dimension. 11. The element of claim 7, wherein: the insert comprises continuous a ring of the second metal having the curve of the first radius. 12. The element of claim 7, wherein: the insert comprises a discontinuous ring of the second metal having the curve of the first radius and having first and second ends. 13. The element of claim 12, wherein: the first and second ends are separated by a distance of at least one millimeter. 14. The element of claim 7, wherein the first metal is different from the second metal. 15. A method to manufacture elements of an acoustic drum, comprising: forming a shell of a sheet of a first metal;forming a top shell edge of the shell including an inner shell edge;forming an insert of a bar of a second metal, wherein forming the insert includes extruding the second metal into the bar;forming an insert edge of the insert, wherein the insert edge is formed during the extruding; andfastening the insert to the shell below the top edge such that the top edge and insert edge form a single continuous inner edge. 16. The method of claim 15, wherein: the insert comprises a discontinuous ring. 17. The method of claim 16, wherein: ends of the bar are separated by a distance of at least one millimeter. 18. The method of claim 15, wherein: the first metal is different from the second metal. 19. A method to manufacture elements of an acoustic drum, comprising: forming a shell of a sheet of a first metal;forming a top shell edge of the shell including an inner shell edge;forming an insert of a bar of a second metal;forming an insert edge of the insert;fastening the insert to the shell below the top edge such that the top edge and insert edge form a single continuous inner edge; andforming a plurality of insert sections of a plurality of bars of the second metal, the plurality of insert sections including forming the insert and the plurality of bars including the bar of the second metal, wherein the plurality of insert sections are fastened to the shell as to collectively form a discontinuous ring. 20. The method of claim 19, wherein: the plurality of insert sections have a curve of a radius equal to a radius of the shell and wherein the curve is pressed into the insert using a press. 21. The method of claim 19, wherein: the plurality of insert sections are formed by extruding the second metal, and during the extrusion, the plurality of insert sections are formed as to have a curve of a radius equal to a radius of the shell. 22. The method of claim 19, wherein: forming the insert comprises rolling the bar to have a curve of a radius equal to a radius of the shell to form a discontinuous ring. 23. The method of claim 22, wherein: ends of the bar are separated by a distance of at least one millimeter. 24. The method of claim 19, wherein: the first metal is different from the second metal. 25. An element of an acoustic drum comprising: a hollow cylindrical shell formed of a first metal, wherein the shell has a first radius extending perpendicular to a first dimension and the shell includes a top edge at a top opening; andan insert formed of a second metal comprising a discontinuous ring having a first and second end, wherein the insert has a curve of the first radius, and the insert is fastened to the shell through a plurality of holes and each hole is elongated as to allow the insert to be adjusted in the first dimension. 26. The element of claim 25, wherein: the insert is fastened to the shell such that the insert is nearer to the top opening than to the top edge of the shell in the first dimension. 27. The element of claim 26, wherein: the insert includes an inner insert edge, an outer insert edge, and an insert surface between the inner insert edge and the outer insert edge; andthe top edge of the shell includes an inner shell edge such that the inner insert edge, insert surface, outer insert edge, and inner shell edge together form a continuous inner edge. 28. The element of claim 27, wherein: the outer insert edge, insert surface, inner insert edge, and inner shell edge together forming a bearing edge. 29. The element of claim 25, wherein: the insert includes an outer insert edge and an inner insert edge, the outer insert edge and inner insert edge together forming a bearing edge. 30. The element of claim 29, wherein: the insert includes a recess configured to be in contact with the top edge and an upper outer portion of the shell at the top opening.