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The tempo tends to vary between approximately 120 to 150 beats per minute (bpm), depending on the style of techno. The creative use of music production technology, such as drum machines, synthesizers, and digital audio workstations, is viewed as an important aspect of the music's aesthetic. Many producers use retro electronic musical devices to create what they consider to be an authentic techno sound.
Software. Software was written to take the FFT of music and find beats. For each frequency bin the magnitude is saved and the standard deviation of it's history is computed. For each bin, if its current mangitude and standard deviation are greater than a certain threshold a beat is detected. Each beat that is detected is assigned a light as well as a random color and location on the table.