Poster: Bcurly
@RyanSilva, I know maar had hem via twitter ontvangen van Laidback, die hem geretweet had.
A - C
AIFF?- Audio Interchange File Format. Full resolution digital file format like .wav or .mp3. Developed originally by Apple, though can now be played on most PCs as well.
Amplitude?- Magnitude of an audio wave. Heard as loudness or volume. Peaks in amplitude can cause distortion or clipping.
Audio Interface?- Hardware unit attached to your computer to allow you to plug in a microphone and speakers. Sometimes these will come bundled with recording software and have other hardware features such as built in MIDI ports, preamps, phantom power, etc.
Bitrate?- Number of bits which can be conveyed per second. Measured as bits/second or kbps. When saving to MP3 format you're often asked to select a bitrate. A good rule of thumb for voice/narration is 64-80kbps. For music, a minimum of 128kpbs should be used. Higher settings yield better quality and also larger files (a tradeoff).
Clipping?- Distortion of audio signal caused by input levels which are too high or 'hot' for the recording device. Ways to reduce clipping include reducing the volume of speaking, placing the mic further from the audio source, and adjusting (reducing) the input levels on the recording device. Set the device's 'input level meter' so that on average the signal reads about -3 to -6 db below redline (0db). Using a wind screen (in the case of popping Ps), and/or use a compressor/limiter between the microphone and the recording device can also be helpful.
Compression (audio)?- In audio, compression refers to a tightening of the volume. Technically compression refers to adding gain or volume to soft areas. In practice this is often combined with Limiting which puts a cap or limit on louder peaks and swells. The proper use of compression can enhance the audibility of a track by tightening the overall dynamic range.
Condenser mic?- Most common mic style for recording voice. Accurate and sensitive. Requires phantom power due to it's low volume output.
D - E
DAW (digital audio workstation)?- Any electronic system designed to record, edit and playback digital audio. Typically this refers to computer-based systems which often include multitrack recording and MIDI for more advanced production. The term 'DAW' simply refers to a general combination of multitrack software and audio hardware.
Decibel (Db)?- A unit of measure expressing loudness.
Delay (digital delay)?- This is a time-based effect and is recognized as an echo sound. Typical parameters include delay time and the number of repeats desired. This is not to be confused with reverb though they often used together.
Dynamic Range?- The loudest point minus the quietest point equals the dynamic range. Measured in decibels (db).
Distortion?- Clipping caused by input levels set too high. Often impossible to remove later once recorded.
Effects (effects processing)?- This usually refers to process added to the music or narration?after?it has been recorded to add quality or interest. Reverb, delay, and chorusing (modulated time shifting) are 3 common examples.
Equalization (EQ)?- The process of adding and subtracting gain to various frequencies. In English that means adding or cutting the amount of bass, treble and mid-range tones to optimize the sound.
Format (File Format)?- When creating audio, you will often be required to select a final format for your audio files. Common formats include .wav, .aif, .mp3, and .aac. There are others. For 99% of your needs you can get by using just .wav (for best quality, loss-less, non-compressed sound), or .mp3 (for final web or online delivery). .aif and .aac are both high resolution Apple formats though are commonly recognized across platforms.
Frequency?- The number of cycles/second in the audio wave, measured in Hertz (Hz) or kHz. Heard by our ears as pitch. Higher Frequencies = higher pitch. The human ear can hear a range from 20Hz - 20khz.
Headroom- The amount of buffer in your audio level below the peaking point (0db). Optimizing 'headroom' is a tradeoff between maximizing loudness and avoiding peak overload.
Hertz (Hz)?- Unit of measure for Frequency.
kbps?- Kilobits per second. See also?Bitrate?above.
Lapel (Lavalier) mic?- A clip-on hands-free mic. Commonly used in video production. A possible mic option for office recording set ups.
Level (input level)?- Loudness or volume of the audio signal received by the recorder. Measured in decibels (db). A good input level to record at is about -3 to -6 db. Input level should never be allowed to exceed 0db on the input level meter (going 'into the red').
Limiting?- The process of placing a 'hard' or 'soft' limit on the maximum volume of an audio track or signal. The very loudest points will be brought back into check with the rest of the signal for a smoother result. Often this is combined with Compression (see above). 'Soft' limiting is more natural with less audible side effects (best for voice). Hard limiting is more rapid and dramatic and best suited for percussion-type instruments.
Lossless?- Meaning that if you save to a format that is 'lossless' there will be zero loss of quality. Typically this will also mean bigger file sizes.
M - O
Mastering?- The final process, after the mixing process, of balancing and sweetening various recordings (typically stereo) for final distribution. For example if ten final recordings are all to be put onto one cd, they may need to each be adjusted somewhat so that they sound coherent when played together. Usually other enhancements are also added and volume is maximized at this stage.
MIDI?- Musical Instruments Digital Interface. A standard for transmitting musical data (not audio signal) between musical devices. Most common application involves a midi controller (like a piano keyboard) which sends pitch, volume, and other performance information to an external sound module.
Mixing?- The process of consolidating a multitrack recording into a stereo or mono file using a hardware or software mixer, not to be confused with Mastering, above.
Mono?- A recording with only one track of audio. For narration, always record in Mono mode since there is no advantage to using stereo, which uses two tracks. Using mono appropriately reduces file sizes.
MP3?- An audio file format. Technically an 'MPEG-1, audio layer 3'. The most common format for audio on the web and portable devices. Allows for very small file sizes with nominal quality loss.
Noise level (signal to noise ratio)?- This is the volume or loudness of the noise heard when no other audio signal is present ('noise floor'). Optimum recording goal is to reduce noise and capture loudest source signal (high signal to noise ratio). Most commonly noise comes in two forms: Hums and Hisses. Causes of hum-type noise include: External noise of fans, motors, computers, etc, or 60 cycle electrical interference from poor grounding or audio cables too close to extension chords and power supplies. Causes of hisses include improper settings on preamps and recording devices. Usually the input level needs proper adjusting.
Normalization?- Process of increasing overall audio volume. Similar to compression.
Peak?- Region of highest amplitude (loudest point) in the audio. Though not always, this term often refers to 'peak overload' when the peak causes clipping.
P - R
Phantom Power?- Power source carried via the microphone cable from the hardware recorder, mixer or interface to the microphone.
Plugin?- An add-on application for your recording software which gives you extra features like extra effects processing, eq, etc. Too many to list.
Popping?- Slang for the sound created when the spoke letter P (i.e. in Peter Piper) causes the level to clip and cause input distortion. Solution move mic farther away, aim mic at nose or chin, use a windscreen on mic between v
Post Production?- This phrase refers to processing steps which take place after you created your initial recording and editing. Steps may include adding effects, compression, eq, etc. plus mixing (for multi-track recordings), mastering and preparing audio for video.
Preamp?- Short for pre-amplifier. This is an extremely common accessory used in audio production. When placed between a sound source (mic or instrument) and a recording device, a preamp can ensure that the audio signal sounds it's best and has appropriate amount of gain. Often these are offered with tubes inside to 'warm up' the signal before heading into the DAW.
Processing (signal processing)?- This includes the family of processes one can apply to a previously recorded audio file to maximize quality or add interest. Common examples include adding effects (delay/reverb etc.), compression, eq, normalization, etc. One should use processing tools sparingly and with a keen ear. Overly processed tracks can sound unnatural or of lesser quality if not treated properly.
Redline?- Common vernacular referring to the point at which the audio signal level goes above the acceptable 0db level, going 'into the red.' This will cause distortion and is to be avoided.
Reverb?- A time based (spatial) effect. Think of the sound of yelling in a parking garage or tunnel. Unlike delay (which has an echo or slap-back sound), reverb has a soft continuous refracted sound. It's the quantum version of Delay (for math people).
Sample Rate?(sampling frequency) - This defines the number of samples taken per second. Higher numbers equal higher quality. Measured in Hertz (Hz), common values are 22kHz, 44.1kHz (CD quality), and 48kHz. 22kHz is acceptable for narration but should be avoided for anything requiring top quality recording or music.
S - T?
Signal?- This refers to the strength and quality of the audio and is typically in the form of an electrical voltage.
Signal path (or chain)?- Every thing the signal must travel through before it reaches the recorder. This may include the cables, mixer, preamp, compressors, interfaces, etc. It is always best to comprise this path with quality components, and keep cabling short to minimize any signal loss.
Stereo?- Not the music player in your living room, this refers to the number of audio tracks. Audio in stereo always contains exactly two tracks. Select this option when you want to record a new track which has two microphones set up or multiple audio input signals. Not necessary for narration.
Tracks?- 1) A completed recording, a single piece of work, such as 'tracks' on an album. Or, 2) In a multitrack recording environment, the number of individual parts or voices which may be recorded. Most systems are limited to a number of available tracks to record onto. Stereo contains simply two tracks, left and right.
.wav?- Short for Waveform audio format. A Microsoft/IBM audio file format standard. This is a lossless, uncompressed format.
U - Z
Wave form editing?- Refers to editing using software which displays the audio graphically on screen (rather than the old tape splicing techniques).
Wind screen?- Placed between the mic and the voice to reduce pops and signal overloads. Hard consonants such as P and T do not stand out as dramatically with a good wind screen.
xlr cable?- Standard 3-pin style microphone cable.
Poster: Maracas
Nu nog het 'ProductieStraattaalwoordenboek' en het topic is compleet dacht ik zo :P
Poster: Bcurly
DJ jerry spin die platen!
Poster: Maracas
Nekschot
Poster: Bcurly
DJ maracas spin die platen dan maar?
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