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Keyboard expression is the ability of a keyboard musical instrument to change tone or other qualities of the sound in response to velocity, pressure or other variations in how the performer depresses the keys of the musical keyboard. Expression types include: Velocity sensitivity —how fast the key is pressed. Aftertouch, or pressure ...
Diseases of the foot. Flatfoot in a 55-year-old woman with ankle and knee arthritis. Vascular ischemia of the toes with the characteristic cyanosis. Chilblains, also called perniosis. Bunion and hammer toe. Foot disease in a Ziguinchor hospital, Senegal, 1973. Athlete's foot, a fungal infection. Diseases of the foot generally are not limited ...
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Plantar fasciitis or plantar heel pain is a disorder of the plantar fascia, which is the connective tissue that supports the arch of the foot. [2] It results in pain in the heel and bottom of the foot that is usually most severe with the first steps of the day or following a period of rest. [2][4] Pain is also frequently brought on by bending ...
Metatarsalgia. Metatarsalgia, literally 'metatarsal pain' and colloquially known as a stone bruise, is any painful foot condition affecting the metatarsal region of the foot. This is a common problem that can affect the joints and bones of the metatarsals. Metatarsalgia is most often localized to the first metatarsal head – the ball of the ...
Alcoholic neuropathy is damage to the nerves that happens from too much drinking. That can cause tingling or numbness in the hands, arms, legs, and feet. “ The mechanism is not well understood ...
Piano key frequencies. This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [1][2] Every octave is made of twelve steps called semitones. A ...
Action (piano) Appearance. The piano action mechanism[ 1 ] (also known as the key action mechanism[ 2 ] or simply the action) of a piano or other musical keyboard is the mechanical assembly which translates the depression of the keys into rapid motion of a hammer, which creates sound by striking the strings. Action can refer to that of a piano ...