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This work proposes a system for the digital reproduction sound ofkompang. Thekompangsounds are represented bybungandpakproduced by palm beating to the membrane. The sounds are recorded in an acoustical sound recording system. In this proposed system, the recorded sounds are then analyzed in a frequency analyzer SpectraPLUS. This frequency contents data can be used as the reference to check the reproduced digital sound. The recorded wave data is converted to MIDI format before being manipulated in Ableton synthesizer system to create modern keyboard notes but representingkompangsound. For the validation purpose, a subjective approach as an additional to the objective comparison with frequency contents is also proposed.

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Metal casting is a process of metallurgical forming by liquidize of material up to certain high temperature to achieve perfect chemical reaction and high level quality products. Auto pour means pouring the metal liquid into the mould not by manual operation but more than automatically done by a set of machine without any human intervention. This paper aims to describe the process of automation for brake drums where several parameters are compare with manual process. The standard time, cycle time, rejection rate, dimension, chemical composition and product quality have been analyzed. The results shows that the standard time reduce to 40%, rejection rate less 5%, tensile strength 3% higher because of better pouring process. The other parameters are the same for both manual or automatic pouring process. The conclusion of this research is that the auto pour provides better results in term of productivity and quality.