Now looking at definitions starting with letter "f"
F1 : See PCM-F1.
Fabric : A fabric is a collection of host or target channel adapters, links and switches that are cross connected in a many-to-many scheme rather than individual, isolated point-to-point or loop topologies. In the world o fibre Channel networks, fabrics describe the physical interconnection of multiple devices interwoven or connected via hubs, switches or HBAs (Host bus adapters).
fade : (1) Slow alteration of the level of a signal, usually using a potentiometer. See fade-in/fade-out. (2) Of a piece of music, usually commercial music, the repeated section at the end of the song which is subjected to a gradual fade-out. See also outro. (3) Short for fade-in/fade-out. Optical effects in which a scene is printed with exposure increasing or decreasing to blackness for fade-in and fade-out, respectively.
fade-in/fade-out : A feature of most audio editing software that allows the user to apply gradual amplitude increase or decrease over some segment of the sound. Fade-in starts with no signal and gradually increases the level. Fade-out starts with a signal present and gradually decreases the level, normally to silence. See crossfade.
fader : (1) A variable attenuator, or volume control. (2) A variable control used to change the distribution of power between front and rear speakers.
far-field : If a sound source is operating in an enclosed space, the SPL will vary with the distance that the measuring microphone is from the source. At certain close ranges, the levels will obey the inverse square law and at these distances, there will exist approximately a free-field. At greater distances, the reduction in measured level with increased distance will be less than predicted by the inverse square, and finally a region will be reached where the level is almost constant regardless of the distance, and this is called the reverberant field. The area between the free-field and the reverberant field is called the far-field. Its extent is a characteristic of the directionality of the sound source as well as of the acoustics of the room.
FASA : Frequency, Amplitude, Spectrum, and Ambience. An audio production method which is based on the criteria that can be changed in sonic terms to enhance a recording:
Frequency: Pitch, transposing parts, chord inversions, layering with other octaves.
Amplitude: Level, use of dynamic range to cut and boost sections, and relative volumes among parts.
Spectrum: Textures and the range of frequencies present, layering sounds with others, introducing new textures from other parts, changing the sounds for a part, like playing a percussion line as a bass part, the contrast in frequency and textures used.
Ambience: Space, reverb, and image information such as panning, depth, height, forward or recessed, for each part playing.
Faulkner array : A near-coincident microphone configuration which uses a pair of figure-eight microphones, both facing directly forward, but separated by about 8".
FC : fibre channel. A networked storage center designed to provide high availability performance and scalable storage with reliable Qos and unified management. Due to industry in fighting and lack of standardization, FC is being supplanted by other less-expensive networked storage standards.
FCIP : Fibre Channel (over) IP. A method of encapsulation or “tunneling" FC protocols so that they can be transported over an IP-based network. FCIP allows FC based storage networks to be extended form LAN to MAN and WAN distances.
feed : In signal routing, an output from one device that is sent into another.
feed reel : The input reel on a tape recorder, from which audio or video tape is fed to the head stack and onto the take-up reel.
feedback : There are two types of audio feedback: acoustic and electronic. (1) Acoustic feedback is where a gain control is set too high in a sound reinforcement system and the amplified sound enters the microphone and is reamplified until a steady howl or whistle is heard. This is also called regeneration. (2) Electronic feedback (or negative feedback) involves the application of a small portion of the output voltage of an amplifier to the input so as to cancel part of the input signal, reducing the gain of the amplifier, but also reducing the distortion and noise introduced by the amplifier. See bootstrap. (3) A specific application of feedback in FM synthesis, where at least one operator in each algorithm is equipped with a feedback loop.
feet/frames : Footage numbers for film, either separated by a colon or by a "plus" sign. For example, 101:16 and 0101+16 both indicate a point 101 feet and 16 frames into the film. There are 16 frames per foot of 35mm film, and 40 frames per foot of 16mm film. See SMPTE timecode, LFOP, ABS.
FFT analyzer : A digital device which performs the transformation from the time domain to the frequency domain of a sound spectrum over a wide frequency range and dynamic range. It is used to measure distortion, S/N ratio, flutter and wow, as well as the phase response and frequency response of audio devices. See Fourier analysis.
fidelity : The accuracy with which a music reproduction system will recreate the sound of the original music.v field
field : (1) The subjective environment which a listener perceives while listening to sound, such as a stereo field. See stereophonic, ambisonic. (2) The area around one or more microphones; the acceptance angle of the microphone. (3) The spatial area of electromagnetic force. (4) In video, a subgroup of visual data consisting of either the odd- or even-numbered lines of any frame. In NTSC, for example, each field is displayed separately for of a second within the total frame duration of second. For each frame, field number one contains line #1, #3...#525; field number two contains lines #2, #4...#524. PAL television broadcasts use an analogous scheme, but has a different frame rate and number of lines per frame.
field rate : Frequency at which video fields occur: 59.94Hz in NTSC, 50Hz in PAL.
fifth : The interval between a note and the seven half-steps above or below it. See interval.
figure-eight microphone : A directional microphone whose pick-up pattern resembles the figure 8, meaning that it is insensitive to the sides but has full sensitivity at the front and back. As the polar pattern resembles the shape of a cosine curve, the figure-eight microphone is sometimes also called a cosine microphone. Figure-eight mics were traditionally ribbon mics, but now they can also be condenser mics. Also called a bi-directional microphone.
file format : The data in a computer file has a particular order and length. The specification which determines the structure of the file is called the file format and is software- and/or hardware-specific. Files, such as MIDI files, may contain data, instructions to other software programs and/or hardware devices, and/or programs. The file may also contain ECC data, network information, and other non-user overhead data. Some file formats are made publicly available to allow the implementation of plug-ins; others are proprietary to the vendor. The file format usually begins with a file header, followed by data, followed by ECC data, followed by some kind of stop bit, if the file format is variable-length. See AIFF, RIFF, AU, MPEG, MOD, RA, SFI, SMF, SMP, SND, WAV, HFS, ISO 9660, VOC.
File Level : The ability to only read and modify an entire file and not the underlying protocols that address the storage device on which the file resides. The term “file level" is often used to differentiate “file-level” NASs from “block-level” SANs.
fill : The sound between words in a production track that is used both to replace undesirable noise on the track and to create handles for use in extending the track at the beginning and the end.
fill leader : The film that is inserted into units of mag film in order to keep synchronization during silent sections. Fill leader is usually made up of recycled release prints. See also leader, plastic leader.
filled : Filled effects is a version of the effects stem(s) of a soundtrack which includes all effects, including cut effects and Foley. See M&E.
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