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Topic: VU meter

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	Stereo VU Meter
		We compared a LED level meter using the chip with our unit and the difference was negligible.
		The 470R resistor in series with the pot is only needed when the VU Meter is connected directly across speaker lines.
		To test the stereo VU meter, connect the two links as shown on the board and connect the dynamic microphone (speaker).
	www.talkingelectronics.com /Projects/StereoVUmeter/StereoVU.html (2274 words)

	VU Meters
		The VU meter is amongst the simplest of meter designs and have been used since the very beginnings of the broadcast, recording and live audio industries.
		VU meters tend to be used in order to cut costs where there is a requirement for a large number of meters, or where the meter needs only to provide an indication that sound is reaching a particular channel, such as on large mixing desks or multi-track recorders.
		A VU meter is particularly useful when setting the gain structure at soundcheck, as again like our ears, desks and other equipment tend to recognise average values, and within reason, tend to ignore the peaks.
	www.roadogz.com /stories/downunder/vumeters.htm (772 words)

	VU meter (Site not responding. Last check: 2007-10-15)
		meter is designed to provide a reasonable way to estimate the loudness of a signal.
		A VU meter is not recommended as the sole metering method for digital systems - it is too slow to catch transients which may overload the system.
		The sluggish nature of the VU can be a benefit as a peak recording may cause the engineer to be too cautious in the level set as some transients cause very little distortion.
	www.sfu.ca /sca/Manuals/ZAAPf/v/vumeter.html (205 words)

	VU And PPM Audio Metering
		VU (Volume Unit) meters used to be the mainstay of audio metering systems, but they have been replaced by LED metering in a great many mixers and other applications.
		The Peak Programme Meter (PPM) was originally developed by the BBC to overcome the shortcomings of the VU meter, which is notoriously bad at showing the peak signal level.
		Very few so-called VU meters come even close to the specification, and the little units on tape machines and sometimes provided on power amplifiers generally bear no resemblance to a real VU meter except that the meter dial is divided into the proper number of divisions, and has a red section from 0VU to +3VU.
	sound.westhost.com /project55.htm (1945 words)

	Shure - Products
		This difference between the reading of a VU meter and a PPM is known as the crest factor.
		As the VU meter displays an average volume of the audio signal, it must "sample" the audio signal over a longer time period than the PPM.
		For example, when the VU meter of a Shure FP mixer reads "0", the PPM on a Sony Beta Cam with a "+12" full scale reading should be set to read at "-8".
	www.shure.com /ProAudio/Products/us_pro_ea_vu (598 words)

	Proper VU meter available? (not simple peak) - DriverHeaven.net
		A proper VU meter will show 0 VU at something like -12dB sine wave, and is used for estimating "loudness" of signals (usually found in broadcast or tape recorders).
		What I figured was to have a "calibrate" slider/control on the VU meter effect/plugin to account for level changes, and calibrate by playing back a sine wave of appropriate amplitude in whatever editing software you use and adjusting the VU meter to read zero.
		You can't properly account for the effect of filter/eq so the VU meter would have to be connected as directly as possible to the wave playback source (FXbus?), not at the epilog.
	www.driverheaven.net /showthread.php?t=93032 (1019 words)

	Radio College \| Reading Room: Articles
		Meters are designed to have standardized response characteristics usually referred to as meter ballistics.
		The response of a VU meter is that of an averaging type meter.
		Remember that meters are not some kind of empirical standard to be blindly adhered to but rather a reference to use as a guide the same way you use a speedometer or ruler.
	www.radiocollege.org /readingroom/articles/craft/metering.php (1393 words)

	Location Sound Corp. -- Tech Tips
		The sound recordest is using the VU meters for showmanship.
		This is because the VU meter is logarithmic, and most of the scale is compressed at the left side.
		The trick is to set the line up tone level with the VU meter on the mixer at 0 dBm, and set the level on the peak meter on the camera, or recorder at -6 dBm.
	www.locationsound.com /proaudio/ls/tips/techtips7.html (528 words)

	Audio Meters (Site not responding. Last check: 2007-10-15)
		There are two general types of meter ballistics (ballistics refers to how the meter responds to changes in the audio signal) used in audio equipment, and many different displays used.
		The VU meter measures average sound intensity and uses the volume unit as itÕs unit of measure.
		The VU meter does not show us everything that is going on in the circuit, it shows us only the average.
	members.aol.com /brophy684/audiometers.html (459 words)

	Giant VU Meter
		This VU Meter stands at 1000mmm and is housed in a rugged plastic coated steel enclosure.
		The Giant VU Meter is similar, only vastly magnified in size and power, and available in a range of colours.
		The idea behind a VU Meter is simple, it takes an audio signal (such as a home stereo, or PA systems Line Out) as it's source, then displays this information by lighting a chain of LED's.
	www.brainfuel.co.uk (573 words)

	vu-meter tutorial :: by youp
		This usually consists of small squares that are dim, then light up when the meter level rises.
		Full VU " layer, draw the meter with each level at full peak.
		This may just be as simple as increasing the brightness, though any changes are possible as long as there is a clear distinction between each level's off and on state.
	homepages.paradise.net.nz /youp/tut/vu.html (396 words)

	VU-meter by Archy
		Linear meter would have been easy to make, but a real VU meter has to be logarithmic.
		That way when a short peak comes into the meter it will be viewed on the LED bar and because the first capacitor is discharged completely quite often, the silence after a peak will be viewed correctly.
		You can make the meter as long as you wish bu cutting that table as desired and adjust the lowermost resistors so that the resistor chain's lower end is in the right voltage.
	www.tekniikka.oamk.fi /~archy/vu-meter/index.html (2488 words)

	Vu Meter Mod Tutorial - Scenyx Entertainment Community
		A VU meter (volume unit meter) is basically a sound level meter just like you would find on your home stereo system.
		Building this VU meter isn't the easiest of modifications and if you don't feel confident identifying components or laying out circuits on strip board then I suggest you get some one else build the circuit for you.
		I decided to use a mono VU meter and double up the outputs rather than a stereo meter for a number of reasons.
	forums.xbox-scene.com /index.php?showtopic=396594 (2761 words)

	Meter Matters
		IN MY VU The classic needle-based VU meter was introduced more than 60 years ago, in part as a visual reference for radio announcers to check that their speaking volume hovered at the optimum level for broadcast (see Fig.
		VU stands for volume unit, and a level of 0 VU is calibrated to correspond to a specific input or output voltage.
		If you're accustomed to peak meters, you may be surprised to find that the perceived loudness (as represented by the RMS level) is more than 15 dB lower than the peak value at the loudest part of the recording.
	emusician.com /mag/emusic_meter_matters/index.html (2049 words)

	USING METERS IN RECORDING
		The VU meter also tries to simulate how the ear hears volume, having its "ballistics" (how fast it rises and falls) simulate the time it takes the ear to respond to sound.
		The best meters are the meters that have needles that rise and fall, because you can read subtle changes in level that wouldn't cause change in which "bar" was lit in a led meter.
		When listening to different mixes, listen to copies that have been "leveled." Run your mixes though a VU meter and record them, one after another, at a level where there are the same for every mix.
	www.recordingeq.com /EQ/req0900/meters.htm (432 words)

	Logitek: Ultra VU Bargraph Audio Meter
		Tri-color LEDs allow the VU level to be shown as a green bar and the peak level to be shown as a red dot.
		The zero VU point is user adjustable allowing optimum use of the 70 dB meter range while the lighted zero reference marker ensures a clear reading of critical levels even from across the room.
		And the front panel brightness control allows the meter to be easily adjusted for ambient lighting conditions.
	www.logitekaudio.com /uvmeter.html (666 words)

	VU-Meter Quick Doc
		To avoid you all these manipulations, the factory PRESET named ANALOG VU (in the contextual menu of the display window) provides you a good emulation of a needle VU-meter, fully dedicated to the audio digital constraints.
		Two helpful presets will enable the user to rapidly switch the VU meter to analog or Digital behavior.
		In a project where more than one VU meter may be open at any one time, the user can avoid confusion by individualizing each view window (e.g.
	perso.wanadoo.fr /vb-audio/us/products/vumeters/vumeter_i.htm (457 words)

	Tactile VU Meter
		Unfortunately conventional VU meters, both analog and digital, are completely inaccessible to those without sight.
		The motivation for this project was the idea to use one of these pager motors as an annunciator in a tactile VU meter and, to be completely fair, this idea originated with Bill Geary at the Smith-Kettlewell Eye Institute in San Francisco.
		The gain of the buffer stage is adjustable via a small trimmer pot and is used to calibrate the VU meter so that the motor triggers at approximately 0 VU.
	www.sparetimegizmos.com /Hardware/Tactile_VU_Meter.htm (303 words)

	xFX JumpStart :: DXVU Meter :: Description
		The VU display mode works by calculating the RMS value of the monitored audio and display the peak value in the form of a peak bar.
		DXVU Meter is also able to save to a WAV file the monitored audio data and since it uses a circular (or infinite) buffer there's no limitation on the amount of audio that can be captured.
		The setup for DXVU Meter includes the binary distribution of DXVU Meter, a complete documentation in HTML format and several sample application with their source code in Visual Basic 6 format.
	software.xfx.net /activex/dxvu (491 words)

	LED Audio VU Meter
		The LED meter is simpler and smaller than it's analogue counterpart, and is very common in audio equipment.
		This project is also an essential part of the expandable analyser to be published soon (or perhaps "eventually"), and one meter circuit is used for each frequency band.
		They are ideal as power meters on amplifiers, can be used with mixers (including the high quality mixer described in the project pages), preamps and any other application where it is important to know the signal level.
	sound.westhost.com /project60.htm (1527 words)

	Mixing Meter Madness - bridging the digital/VU meter gap - by John Vestman :: Galaris Independent Musicians :: music ... (Site not responding. Last check: 2007-10-15)
		Correct meter settings can help a lot especially when you have digital peak meters and analog VU meters to look at.
		Secret: VU meters were designed around analog tape recordings, where there is really 14 dB of invisible headroom above 0VU that is not displayed on the meters.
		This is why RMS VU meters are a good tool to have (at least) for your stereo mixes.
	www.galaris.com /articles?id=302 (1243 words)

	diyAudio Forums - VU Meter
		The only thing im confused on is how to add a VU meter to this project.
		Although 0 VU is shown on a VU meter as the point of 100% MODULATION, it is not identical to the reference called zero level, which in fact refers to -4 dB or -4 VU on the meter.
		Other levels may be described in reference to it; for instance, 0 VU is +4 dbm and represents a voltage level of 1.228 volts.
	www.diyaudio.com /forums/showthread.php?postid=555772 (459 words)

	Audio Video Electronic Products - ApogeeKits
		Stereo VU meter kit K4305 with 2 x 10 LEDs (dot or bar indicator) and an adjustable input.
		Precision stereo VU meter kit K4306 has 2x 15 LED's (dot or bar indicator) and an adjustable input.
		Star VU meter kit MK172 responds to sounds or music and controls 60 LEDs in the shape of a star which behave like an LED VU meter.
	www.apogeekits.com /audio_video.htm (639 words)

	VU Meter is 2 bars instead of 3 - Slim Devices : Community : Forums
		VU Meter is 2 bars instead of 3
		The VU meter on my Squeezebox3 used to have three bars, but now it's only two.
		I was confusing a VU meter with a spectrum analyzer.
	forums.slimdevices.com /showthread.php?t=23894 (442 words)

	Volumn Unit Meters / Sound Level Monitors electronic circuits
		Audio level meter (VU Meter): This circuit uses just one IC and a very few number of external components.
		VU Meter: 5 led VU meter, in PDF format, includes circuit board, text in Finnish (Electronic circuit added 5/02)
		VU Stereo Meter: will indicate the volume level of the audio going to your speakers by lighting up LEDs, based on LM3915 IC (Electronic circuit added 5/02)
	www.discovercircuits.com /V/vu-meter.htm (561 words)

	DIYHiFi.org :: View topic - VU Meter Driver Circuit
		Seems there are not many true VU meter scale devices to be had.
		However the meters jump up from zero on the scale as soon as power is applied and cannot be zeroed out with the meter mechanical adjustment.
		When a modulated signal is introduced to the amplifier, the meter should give you a pleasant display when the amplifier is being operated near full power.
	www.diyhifi.org /forums/viewtopic.php?t=371 (1094 words)

	Audio Level Meter
		I designed this audio level meter program to allow the optimum setting of input levels for various sound recording functions, particularly for video editing.
		Available scaled as a BBC PPM, or with a range similar to the traditional VU meter, but minus it's inability to display peaks.
		With Windows versions prior to XP it is not normally possible to use the meter at the same time as other programs which are recording audio.
	www.darkwood.demon.co.uk /PC/meter.html (1807 words)

	Audio Equipment
		VU Meter - 10-Led VU Meter Audio Indicator Kit
		This 10 LED audio level indicator is the perfect thing ensure you are at the correct audio setting.
		VU Meter - 2x10 LED Stereo VU Meter Kit
	www.hobbytron.com /AudioEquipment.html (484 words)

	VU-meters.
		In the analog field, the V.U. concept deals with different definitions.
		Firstly, 0 dBm gives the level of a signal outputing a power of 1 mW on a 600 ohms line.
		All technical specifications and any informations of the products specified on this web site may be subject to change without notice.
	perso.orange.fr /vb-audio/us/products/vumeters/vumeter.htm (355 words)

	diyAudio Forums - digital VU-meter
		PPM (attack/decay) metering is easy using straight multiplies/adds/compares, and VU is a 5th (?) order IIR filter.
		It's notable that the workhorse instrument of the industry, the Tek 746 digital audio meter, doesn't have 'classic' PPM dynamics for its 4 level meters.
		It can be configured in many ways, like 2 channel full-range VU meter, 2 channel 5-band spectrum analyser, or mono 10-channel spectrum analyser.
	www.diyaudio.com /forums/showthread.php?postid=586366 (1146 words)

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