How do I attach the automaticgaincontrol to a particular audiorecord?
To attach the AutomaticGainControl to a particular AudioRecord , specify the audio session ID of this AudioRecord when creating the AutomaticGainControl
The audio session is retrieved by calling getAudioSessionId () on the AudioRecord instance
What is automatic gain control?
Automatic gain control (AGC), is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input
What is the difference between HDR and automatic gain control?
Automatic gain control (AGC) compensates the receiver's dynamic range by ensuring that the incoming signal is contained within the desired range while the HDR utilizes these multi-channel gains to extend the dynamic range of the composited signal
×Automatic Gain Control (AGC) is a circuit design that maintains a constant level of amplification for sound or radio frequency signals. It is used in most radio receivers to equalize the average volume of different radio stations due to differences in received signal strength, as well as variations in a single station's radio signal due to fading. AGC is also used in audio processing units of multimedia multipoint servers to bring the power level of the audio signal of every active channel to within a fixed range. AGC amplifiers are designed to vary their gain according to the input signal level, providing enough amplification for weak signals and preventing strong signals from getting over amplified. AGC is typically one of the last Voice Quality Enhancement (VQE) blocks of the transmit path of the microphone signal.
Automatic gain control audio
Howling caused by a circular path in an audio system
Audio feedback is a positive feedback situation that may occur when an acoustic path exists between an audio input and an audio output. In this example, a signal received by the microphone is amplified and passed out of the loudspeaker. The sound from the loudspeaker can then be received by the microphone again, amplified further, and then passed out through the loudspeaker again. The frequency of the resulting howl is determined by resonance frequencies in the microphone, amplifier, and loudspeaker, the acoustics of the room, the directional pick-up and emission patterns of the microphone and loudspeaker, and the distance between them. The principles of audio feedback were first discovered by Danish scientist Søren Absalon Larsen, hence it is also known as the Larsen effect.
Audio forensics is the field of forensic science relating to the
Audio forensics is the field of forensic science relating to the acquisition, analysis, and evaluation of sound recordings that may ultimately be presented as admissible evidence in a court of law or some other official venue.
In electronics
Ability of a circuit to increase the power or amplitude of a signal
In electronics, gain is a measure of the ability of a two-port circuit to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal. It is usually defined as the mean ratio of the signal amplitude or power at the output port to the amplitude or power at the input port. It is often expressed using the logarithmic decibel (dB) units. A gain greater than one, that is, amplification, is the defining property of an active component or circuit, while a passive circuit will have a gain of less than one.
Gain compression
Reduction in gain due to nonlinearity
Gain compression is a reduction in differential or slope gain caused by nonlinearity of the transfer function of the amplifying device. This nonlinearity may be caused by heat due to power dissipation or by overdriving the active device beyond its linear region. It is a large-signal phenomenon of circuits.
Audio feedback is a positive feedback situation that may occur
Howling caused by a circular path in an audio system
Audio feedback is a positive feedback situation that may occur when an acoustic path exists between an audio input and an audio output. In this example, a signal received by the microphone is amplified and passed out of the loudspeaker. The sound from the loudspeaker can then be received by the microphone again, amplified further, and then passed out through the loudspeaker again. The frequency of the resulting howl is determined by resonance frequencies in the microphone, amplifier, and loudspeaker, the acoustics of the room, the directional pick-up and emission patterns of the microphone and loudspeaker, and the distance between them. The principles of audio feedback were first discovered by Danish scientist Søren Absalon Larsen, hence it is also known as the Larsen effect.
Audio forensics is the field of forensic science relating to the acquisition
Audio forensics is the field of forensic science relating to the acquisition, analysis, and evaluation of sound recordings that may ultimately be presented as admissible evidence in a court of law or some other official venue.
In electronics
Ability of a circuit to increase the power or amplitude of a signal
In electronics, gain is a measure of the ability of a two-port circuit to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal. It is usually defined as the mean ratio of the signal amplitude or power at the output port to the amplitude or power at the input port. It is often expressed using the logarithmic decibel (dB) units. A gain greater than one, that is, amplification, is the defining property of an active component or circuit, while a passive circuit will have a gain of less than one.
Gain compression
Reduction in gain due to nonlinearity
Gain compression is a reduction in differential or slope gain caused by nonlinearity of the transfer function of the amplifying device. This nonlinearity may be caused by heat due to power dissipation or by overdriving the active device beyond its linear region. It is a large-signal phenomenon of circuits.
