How to record sound- paths, levels and formats.
An analogue signal is a continuous signal where the varying feature (time) is another representation of another varying quantity or a varying amplitude. Whereas a digital signal is an electrical on/off signal that is converted into a pattern of bits (short for binary digit, bits are the smallest unit of data that is used in a computer. And has a single binary digit; either a 1 or a 0). Digital unlike analogue which is a signal of time-varying quantities, digital has a value at each sampling point. If a digital signal has large time divisions then the play back will be worse quality than if it was an analogue signal or if it had smaller time divisions. With the waves, analogue is in sine waves and have continuous values and digital is in square waves with no curves which uses discrete values. Analogue signals are recorded in the waves…show more content… 1 bit has a single binary value which is either a 1 or a 0. Bits are generally used to store data and to execute instructions in multiples called bytes. In most computer systems there are 8 bits to a byte. The value of a bit is usually stored as either above or below a designated level of electrical charge in a single capacitor within a memory device. 4 bits or half a byte is called a nibble. The bit rate in telecommunication is the number of bits, in a given time period, that are transmitted (the time period is usually a second).
Sample rate is the amount of times an analogue signal is sampled or measured (usually per second). The way that sample rate is usually measured in ‘samples per second’ and is often expressed in Kilohertz (kHz). When a CD is recorded it is usually in 44kHz. When you are taking samples from an analogue signal, the more samples you take from the signal the more accurate the replay of the digital sound is going to be. The range of human hearing is from
