Audio Media - September 2008 - (Page 56) AUDIO PRECISION APX525 Two Channel Analyser GRAHAM LANGLEY sets to work with the newest audio test and measurement kit from AP. he Audio Precision APx is the newest model in the APx Series of audio test sets. The range was launched with the APx and APx , eight- and -channel analysers, aimed specifically at power amplifier and CD/ DVD/MP player manufacturers, for use in R&D and production test. The APx is a two channel model available with both analogue and digital I/O, and there is a version without the digital I/O designated the APx . The system I/O can be expanded using a variety of switchers which need an additional computer USB port. Both are intended for use by a wide range of engineers who want to obtain fast and easy audio test measurement but do not need the ultra high performance of AP’s Series, or the multi-channel facilities of the APx / . Following in the steps of the ATS- , signals are generated and analysed in the digital domain using -bit/ kHz converters. Measurements can be analysed from DC to kHz. Signals can be generated internally, or for playback only devices, an external source can be used. AP provides a Resource disc which includes documentation, a full suite of test signals and a waveform creation tool. The basic measurements include level and gain, THD+N, frequency response, S/N ratio, crosstalk, interchannel phase, and CMRR. DC level, IMD, tone burst, and very high resolution FFT measurements are also available. All APx systems include a precision measuring instrument and the APx software, which runs on a PC. The connection to the host PC is made by a USB . cable. Data processing is carried out in the PC, therefore system performance is related to processor speed. The APx series are data intensive and AP recommends at least an Intel Core Duo or AMD Athlon X CPU with a minimum of GB of RAM for optimal performance. Both Windows Vista and XP are supported, but not in -bit versions. AP advises against running other applications concurrently. T First I mpressions The front panel has a clean and logical layout with modules for analogue output, analogue input and digital I/O, and a mains power switch. Analogue signals can be accessed by balanced XLR or banana connectors, and BNC connectors are provided for unbalanced signals. Digital I/O features AES , SPDIF/SMPTE, and optical Toslink connectors all with a sample rate of up to kHz. There are no user controls, all settings and measurements are made from the software interface. The rear panel provides connectors for power, USB computer interface, aux control in and out, and software options. The construction is to AP’s usual sturdy standards with a grey and blue finish. A U rack mounting kit is available and the optional carrying handle makes the . kg APx a portable test set in conjunction with a laptop. “The look is completely different from previous AP software with the intention of providing an intuitive user interface and improvement in testing time.” THE REVIEWER GRAHAM LANGLEY has been active in pro audio for 35 years. As co-founder of Amek and Total Audio Concepts, he designed many of their consoles. He now consults on audio projects. www. langley-design.com The look is completely different from previous AP software with the intention of providing an intuitive user interface and improvement in testing time. The first impression of the new GUI is the straightforward measurement-oriented layout. Most of the screen is occupied by a graph of the test selected, together with the necessary controls and a Start button to run the measurement. A tree structure Measurement Navigator is displayed in a window to the left of the screen. This allows the user to set up a Project containing signal path setup information, a series of customisable measurements, and to include user prompt and test limit information if required. This may be saved as a shareable file that contains control information only and can be run on any compatible APx system. It does not include any measurement results, reporting information or external programs called up by the prompts. Measurements carried out in R&D can therefore be replicated in manufacturing, or production tests can be carried out in any location. The Navigator > 56 AUDIO MEDIA SEPTEMBER 2008 http://langley-design.com
Table of Contents Feed for the Digital Edition of Audio Media - September 2008 Audio Media - September 2008 Contents Recording Post Broadcast What's Up UK GeoFocus: Middle East For The Record Special Report: The Conch Shortlists Rode NTG-3 Marantz PMD 620 JZ Mics The Black Hole Final Cut Double Feature: Hellboy II and Mamma Mia Chandler TGI Unit of Change SSL Matrix Imagion Hollyoaks Goes HD Audio Precision APx525 Electric Mastering The Power of Sound Video Guide: HD Acquisition Part 3 AMSR Cinema Expo International 2008 Soundcraft Si3 Midas PRO 6 Innovason Eclipse Senheiser SR 350 IEM G2 A Night at the Opera AM SR Product Sampler: Wireles Mic Systems Audio Media - September 2008 Audio Media - September 2008 - Audio Media - September 2008 (Page Cover1) Audio Media - September 2008 - Audio Media - September 2008 (Page Cover2) Audio Media - September 2008 - Audio Media - September 2008 (Page 3) Audio Media - September 2008 - Contents (Page 4) Audio Media - September 2008 - Contents (Page 5) Audio Media - September 2008 - Contents (Page 6) Audio Media - September 2008 - Contents (Page 7) Audio Media - September 2008 - Recording (Page 8) Audio Media - September 2008 - Special Report: The Conch Shortlists (Page 9) Audio Media - September 2008 - Post (Page 10) Audio Media - September 2008 - Post (Page 11) Audio Media - September 2008 - Broadcast (Page 12) Audio Media - September 2008 - Broadcast (Page 13) Audio Media - September 2008 - What's Up UK (Page 14) Audio Media - September 2008 - What's Up UK (Page 15) Audio Media - September 2008 - GeoFocus: Middle East (Page 16) Audio Media - September 2008 - GeoFocus: Middle East (Page 17) Audio Media - September 2008 - For The Record (Page 18) Audio Media - September 2008 - Audio Precision APx525 (Page 19) Audio Media - September 2008 - Audio Precision APx525 (Page 20) Audio Media - September 2008 - Audio Precision APx525 (Page 21) Audio Media - September 2008 - Video Guide: HD Acquisition Part 3 (Page 22) Audio Media - September 2008 - Video Guide: HD Acquisition Part 3 (Page 23) Audio Media - September 2008 - Marantz PMD 620 (Page 24) Audio Media - September 2008 - Marantz PMD 620 (Page 25) Audio Media - September 2008 - JZ Mics The Black Hole (Page 26) Audio Media - September 2008 - JZ Mics The Black Hole (Page 27) Audio Media - September 2008 - Final Cut Double Feature: Hellboy II and Mamma Mia (Page 28) Audio Media - September 2008 - Final Cut Double Feature: Hellboy II and Mamma Mia (Page 29) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 30) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 31) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 32) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 33) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 34) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 35) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 36) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 37) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 38) Audio Media - September 2008 - AM SR Product Sampler: Wireles Mic Systems (Page 39) Audio Media - September 2008 - Chandler TGI (Page 40) Audio Media - September 2008 - Chandler TGI (Page 41) Audio Media - September 2008 - Unit of Change (Page 42) Audio Media - September 2008 - Unit of Change (Page 43) Audio Media - September 2008 - Unit of Change (Page 44) Audio Media - September 2008 - Unit of Change (Page 45) Audio Media - September 2008 - SSL Matrix (Page 46) Audio Media - September 2008 - SSL Matrix (Page 47) Audio Media - September 2008 - Imagion (Page 48) Audio Media - September 2008 - Imagion (Page 49) Audio Media - September 2008 - Imagion (Page 50) Audio Media - September 2008 - Imagion (Page 51) Audio Media - September 2008 - Hollyoaks Goes HD (Page 52) Audio Media - September 2008 - Hollyoaks Goes HD (Page 53) Audio Media - September 2008 - Hollyoaks Goes HD (Page 54) Audio Media - September 2008 - Hollyoaks Goes HD (Page 55) Audio Media - September 2008 - Hollyoaks Goes HD (Page 56) Audio Media - September 2008 - Hollyoaks Goes HD (Page 57) Audio Media - September 2008 - Electric Mastering (Page 58) Audio Media - September 2008 - Electric Mastering (Page 59) Audio Media - September 2008 - Electric Mastering (Page 60) Audio Media - September 2008 - Electric Mastering (Page 61) Audio Media - September 2008 - The Power of Sound (Page 62) Audio Media - September 2008 - The Power of Sound (Page 63) Audio Media - September 2008 - The Power of Sound (Page 64) Audio Media - September 2008 - The Power of Sound (Page 65) Audio Media - September 2008 - The Power of Sound (Page 66) Audio Media - September 2008 - The Power of Sound (Page 67) Audio Media - September 2008 - The Power of Sound (Page 68) Audio Media - September 2008 - The Power of Sound (Page 69) Audio Media - September 2008 - AMSR (Page 70) Audio Media - September 2008 - AMSR (Page 71) Audio Media - September 2008 - Cinema Expo International 2008 (Page 72) Audio Media - September 2008 - Cinema Expo International 2008 (Page 73) Audio Media - September 2008 - Soundcraft Si3 (Page 74) Audio Media - September 2008 - Midas PRO 6 (Page 75) Audio Media - September 2008 - Innovason Eclipse (Page 76) Audio Media - September 2008 - Innovason Eclipse (Page 77) Audio Media - September 2008 - Senheiser SR 350 IEM G2 (Page 78) Audio Media - September 2008 - Senheiser SR 350 IEM G2 (Page 79) Audio Media - September 2008 - A Night at the Opera (Page 80) Audio Media - September 2008 - A Night at the Opera (Page 81) Audio Media - September 2008 - A Night at the Opera (Page 82) Audio Media - September 2008 - A Night at the Opera (Page 83) Audio Media - September 2008 - A Night at the Opera (Page 84) Audio Media - September 2008 - A Night at the Opera (Page 85) Audio Media - September 2008 - A Night at the Opera (Page 86) Audio Media - September 2008 - A Night at the Opera (Page 87) Audio Media - September 2008 - A Night at the Opera (Page 88) Audio Media - September 2008 - A Night at the Opera (Page 89) Audio Media - September 2008 - A Night at the Opera (Page 90) Audio Media - September 2008 - A Night at the Opera (Page Cover3) Audio Media - September 2008 - A Night at the Opera (Page Cover4)
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