converting stereo signal to mono signal is called
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title: Audio signal text: Audio signal An audio signal is a representation of sound, typically as an electrical voltage for analog signals and a binary number for digital signals. Audio signals have frequencies in the audio frequency range of roughly 20 to 20,000 Hz (the limits of human hearing). Audio signals may be synthesized directly, or may originate at a transducer such as a microphone, musical instrument pickup, phonograph cartridge, or tape head. Loudspeakers or headphones convert an electrical audio signal into sound. Digital audio systems represent audio signals in a variety of digital formats. An audio channel or audio track is an audio title: Signal text: words, it is quantized. Quantization is the process of converting a continuous analog audio signal to a digital signal with discrete numerical values. Signals in nature can be converted to electronic signals by various sensors. Some examples are: Other examples of signals are the output of a thermocouple, which conveys temperature information, and the output of a pH meter which conveys acidity information. A typical role for signals is in signal processing. A common example is signal transmission between different locations. The embodiment of a signal in electrical form is made by a transducer that converts the signal from its title: Tandem signaling text: Tandem signaling Tandem signaling is the two-step conversion of a digital signal into an analog signal, followed by the reverse conversion. While there is a universal standard for analog signal transmission, digital signals may employ a variety of sampling rates and encoding methods (codecs). Any differences in sampling rate or encoding between transmitter and receiver introduces errors or artifacts in the resulting signal. When speech is being transmitted, as in audio telephone calls, tandem signaling may produce unintelligible results. Tandem signaling is an important evaluation criterion in the evaluation of speech coders. Mobile telephones use digital signals, while land lines title: Signal text: processing, signals are analog and digital representations of analog physical quantities. In terms of their spatial distributions, signals may be categorized as point source signals (PSSs) and distributed source signals (DSSs). In a communication system, a "transmitter" encodes a "message" to create a signal, which is carried to a "receiver" by the communications channel. For example, the words "Mary had a little lamb" might be the message spoken into a telephone. The telephone transmitter converts the sounds into an electrical signal. The signal is transmitted to the receiving telephone by wires; at the receiver it is reconverted into sounds. In title: Audio mixing text: Audio mixing Audio mixing is the process by which multiple sounds are combined into one or more channels. In the process, a source's volume level, frequency content, dynamics, and panoramic position are manipulated and or enhanced. This practical, aesthetic, or otherwise creative treatment is done in order to produce a finished version that is appealing to listeners. Audio mixing is practiced for music, film, television and live sound. The process is generally carried out by a mixing engineer operating a mixing console or digital audio workstation. Before the introduction of multitrack recording, all the sounds and effects that were to