A bump key can open any lock that it fits into. It's helpful to have in your pocket if you ever lose your keys, because it can open your door lock and your deadbolt, even if they normally require seperate keys.
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Read More »Lockpicking is a skill that takes years upon years to master. Locks come in all sorts of shapes and sizes, but have common ground in how they work. Most cylinder locks have "tumblers," which are metallic cylindrical objects that sit vertically to the actual locking mechanism. Tumblers have five or six holes with rounded key pins of various height in them, each needing to meet an exact height or the cylinder in the center (the lock itself) will not be allowed to turn. This is the reason why you see those "mountains and valleys" on keys, and why these types of locks are called pin tumbler locks. Each is unique. Today's Null Byte is going to demonstrate how to effectively make what is called a "bump key". A bump key can open any lock that it fits into. It's helpful to have in your pocket if you ever lose your keys, because it can open your door lock and your deadbolt, even if they normally require seperate keys. I keep mine in my wallet.
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Read More »88 keys By the 1890s, today's modern keyboard had become established with 88 keys spanning 7¼ octaves (from 2A to C5; 27.5 Hz to 4,186 Hz*).
The piano that Bartolomeo Cristofori first invented in Italy had only 54 keys. As piano music developed and evolved, the keyboard compass was gradually expanded in response to requests from composers who sought a broader potential for expression. By the 1890s, today's modern keyboard had become established with 88 keys spanning 7¼ octaves (from 2A to C5; 27.5 Hz to 4,186 Hz*). The human ear can hear sounds in the range from approximately 20 Hz to 20,000 Hz, but the upper limit of frequencies that the human brain can discriminate is at the very most around 4,000 Hz. Even if the compass were to be expanded by increasing the number of keys on the piano, to the human ear, the extra notes at the bass end would become nothing more than a rumbling noise, and the added treble notes would be heard as an unpleasant dissonant noise with no sense of being in a tonal range, and thus, musically, would be almost meaningless. Boesendorfer is making 97-key pianos with nine additional keys in the bass segment of the keyboard (2C to C5). However, the strings for these nine keys in the lowest bass segment are really only there to provide a richer sound when other keys are played by resonating with them. In reality, the extra keys themselves are almost never played directly. * When A is tuned to 440 Hz. The pitch of the individual keys will vary depending on the tuning method.
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