Delay Lines. Comprehensive Review: " APL1 " - Advanced DSP / EQ / Phase Correction Unit. External link: APL1 Want to start off this review by saying that this is without doubt one of the better products I've come across for a long time.
Many thanks to "Raimonds" here on the forum, the designer of this product - who introduced and let me demo this product. APL1, basically an advanced equalizer which utilizes FIR (Finite Impulse Response). It can form any curve you desire with very few restrictions, in addition to that it also corrects phase deviations in all minimum phase regions. Instead of reciting the entire spec I'll just copy/paste it from the official website. Delay estimation and measurement. Two posts early I wrote about John’s problems with his monitors.Actually, the monitors are Quested V3110 for about 4000$ each.We did some work and get results.Please find pictures attached.1) an initial AFR,2) an initial TDA delay graph,3) an AFR after minimum phase correction of AFR,4) a TDA delay graph after minimum phase correction of AFR,5) a TDA delay graph after delay correction.
And impressions of John: "Last night I listened to a project I recorded in 2005, I have listened to the project hundreds of times over the years. I heard details that I forgot were there like speed changes in the Lesile speaker and small inflections in the back up vocal. The reverb detail was un believable. It brought back memories of every detail of the sessions. The guitar tone reminded me of the guitar players amp and the mic I used. Line Array Education : livesound. Facebook - Log In or Sign Up. Sound Waves. A concise survey of the fundmental properties of sound waves Contents Introduction Sound is a vibratory motion of the air.
In our ears, it gives the sensation of hearing. It is excited by vibrating bodies and transmitted to our ears without sensible motions of the air. Plane Waves To make the problem as simple as possible, without losing any of the important details, let us consider a plane wave of sound. The wave can be completely described in terms of the displacement ξ(x,t) of the particles originally at any coordinate x at any time t. The force on a thin sheet of gas of thickness dx is the difference in the pressures on the two sides of the sheet. Discussion of Group Delay in Loudspeakers. (posted around 1998 to Bass List) Peter wrote: > Does anyone know of demanding source material that readily demonstrates the need > for linear phase/flat group delay?
ANY recorded music will reveal group delay errors if the errors are severe enough. Take the trivial example of a 24 hour delay between the highs and lows. The highs arrive normally but you have to wait until tomorrow to hear the lows. A new Room-Capture version has been released with a number of new features and improvements.
Presets, saves your settings for the stimulus and analyzer. A range of useful settings is provided for different applications. GUI Much effort is put in the new user interface to reduce the need for dialog boxes and spin-boxes. These are replaced with modern mouse wheel and grab ‘n’ drag mouse based controls. For example if you need to change the range of a graph, this is now done with the mouse wheel. View topic - Creating Speaker Data XHN Files. Bass Speaker Position in PA Systems. Bass Loudspeaker Position in PA Systems Bass speakers have their own particular issues.
Because the wavelengths involved are relatively large (about 2.8 metres at 125Hz), the horn sizes needed to provide adequate pattern control are impractical for many touring (or, indeed, permanently installed) systems. Most speakers dealing with frequencies below about 250Hz (i.e. with wavelengths greater than about 1.4 metres) can be treated as omnidirectional for most practical purposes.
Also, our ears use higher frequencies (with shorter wavelengths) to work out where sounds are coming from: we are not very good at identifying the position of low-frequency sounds. Revisiting Subwoofer Design and Thiele-Small Parameters. Subwoofers are arguably the most popular and fun topic in all of pro audio.
The majority of low frequency sound reproduction is from vented loudspeaker enclosures, which is to say loudspeakers that have a port in the enclosure. The vented subwoofer loudspeaker enclosure makes a great entry point into the world of building loudspeaker enclosures. Building a box, wiring it up and then hearing the beast rumble to life is an extremely rewarding experience. Numerous programs are available to predict the frequency response of vented boxes. Strassacker: Speaker Building, Components. AJ Audio Subwoofer Box Enclosure Design Software - Sub Speaker Cabinet Building Program Downloads. Providing subwoofer design software programs for solving the required calculations for custom bandpass, sealed and vented box cabinet designs.
Can be used for car, truck, sport utility vehicle (SUV), Jeep automotive, guitar and home theater applications and projects. This site provides the instructions and "how to" information to successfully plan, design, construct, build and setup subwoofer enclosure systems using AJ Bandpass Designer, Sealed Designer and Vented Designer. Works with any type and size of driver (8, 10, 12, 15 inch). The Subwoofer Designer Series is intended for the hobbyist, audio / acoustic enthusiast and Do It Yourself (DIY) speaker builder.
Articles - How to Configure Your PA System. The performance of any loudspeaker will be influenced by the acoustics of the space in which they operate.
Difficult room acoustics, combined with improper loudspeaker placement, can interfere with achieving the fidelity of which your loudspeakers are capable. This article will guide you around some of the pitfalls when configuring a PA system. Recognizing Problem Rooms In most live environments, the room is rarely designed to maximize the listening experience. NEXT-ProAudio Introduces LA212X Line Array Element. Following the huge success of the LA12 line array system and after an extended period of hard research and development NEXT announced the introduction of its state-of-the-art line array element LA212X.
Making extensive use of NEXT innovative technologies specially developed for this project, the LA212X overcomes most of the acoustic problems usually found in vertical array systems. The result is an unprecedented combination of a sonic excellence, transparency and consistency across the coverage area even at the highest sound pressure levels. Main Features General Description. Audiomatica Srl. CLIO Pocket Brochure CLIO Pocket Survival Guide CLIO Pocket microphone Accessories.
INTRODUZIONE AI SISTEMI "LINE-ARRAY" - Palcoplus - professional array system. While not intended to be a complete technical essay about line-array systems, this chapter will provide a brief summary of the basic theory of operation and of the benefits of line-array systems. Understanding the physical principals that determinate the behavior of these systems will allow the user to optimize its application in mobile or fixed installations.
The desired result from any sound reinforcement system is high sound pressure and uniform coverage over the audience area. This objective has often been addressed by using more powerful speakers, or a larger number of them. The problems encountered using this strategy are well known. Line array systems use a different approach to solve these problems. Topic: Time Alignment/Delay (1/1) Hi, This is not as easy as you think to do correctly. I used to think you could just measure the distances from the drivers to the listening point and calculate the delays from that. Filters - Difference between phase delay and group delay? They don't both measure how much a sinusoid is delayed. Phase delay measures exactly that. Group delay is a little more complicated. Picture a short sine wave with an amplitude envelope applied to it so that it fades in and fades out, say, a gaussian multiplied by a sinusoid.
This envelope has a shape to it, and in particular, it has a peak that represents the center of that "packet. " Group delay tells you how much that amplitude envelope will be delayed, in particular, how much the peak of that packet will move by. EASE Developer's Page - Help Line Array Modeling in EASE 4.0. How can modern Line Arrays be modeled in computer simulations ? View topic - Speaker Lab - Line Array cabinet definitions. Official website of D.B.Keele. Custom Search. A technique for setting delay ( for Subwoofer arrays ) - BillFitzmaurice.info. Situation: Integrating sub cabs separated by distance... FOH ENGEENIERS AND LINE ARRAY FASCHION - Aleksandar Design Club.
Methods and Limitations of Line Source Simulation. Journal Forum. Biro Technology. List of equations in wave theory. This article summarizes equations in the theory of waves. Harman - JustinBieberSingapore2011. Veteran concert sound supplier Soundcheck of Manila provided a massive HARMAN JBL VERTEC® line array system for teen sensation Justin Bieber’s recent concert at the SM Mall of Asia Concert Grounds.
The show, part of Bieber’s “My World Tour" which has spanned the globe since kicking off a year ago, drew a total of 70,000 fans. View topic - Creating Speaker Data XHN Files. Time-Frequency Analysis. Frequency Response: Waterfalls. Line Array Limitations « Pro Sound Training. When is it a line-array? Audio Artistry. Sound Reinforcement Products for Line Array Positioning: September 2005. Matlab Projects..... Matlab - Frequency response with chirp signal.
Subwoofer setup and integration 101: sub crossover frequency, slope and phase for two channel systems - Acoustic Frontiers. Sound field reconstruction and its application in loudspeaker sound radiation prediction. TrueRTA Audio Spectrum Analyzer Software. Bob McCarthy's Blog. Subwoofer setup and integration 101: sub crossover frequency, slope and phase for two channel systems - Acoustic Frontiers. Sndpeek : real-time audio visualization. Spectrum Analyzer Software with MATLAB and Simulink - MATLAB. SIM 3 : Audio Analyzer. DEQX tutorial - time aligning a sub with main speakers - Amplifiers & Pre-Amps - StereoNET. Phase response correction - BillFitzmaurice.info. Linkwitz-Riley Crossovers: A Primer. Smaart procedure for aligning subs and tops. Phase, Time and Distortion in Loudspeakers. Time Alignment vs. Phase Alignment. Open Control Architecture. Key Elements of Successful Column Loudspeaker System Design - 1043906. Beaming-steering technology – past, present and future.
Room Acoustics Analysis. Woodshop/dsonify. Woodshop/dsonify. Acoustic Treatment and Design for Recording Studios and Listening Rooms. Dr. Nor Mariah Adam. Μάϊος 2012. Measurement microphone calibration. The free encyclopedia. Large Systems and Line Arrays. Line Array Practice. NETGEN. Finite-difference time-domain method. Finite and Boundary Element Method for Acoustics.
Finite-difference time-domain method. True Audio: Audio Spectrum Analyzer and Loudspeaker Design Software. Downloads : Acoustics Software : SpectraPlus.com. More Properties of Hankel and Bessel Functions. Library » The Distributed Edge Dipole (DED) Model for Cabinet Diffraction Effects. Practical Soundproofing. Phase Relationships in Audio Signals. Line-Array Loudspeaker Systems. The Murphy Corner-Line-Array Home Page. Meyer Sound. Newbie guide - Music Producer - Mουσική. Public address system.