Audio.TST Archive
Audio Precision sends out the Audio.TST newsletter once a month to approximately 13,000 audio engineers and other audio professionals. Each issue looks at current events in audio test, answers readers´ technical questions and announces any AP news.
Notes from the Test Bench
By Bruce Hofer, Chairman & Co-Founder, Audio Precision After back-to-back flights from Beaverton to Seoul and Beaverton to Amsterdam, you might think it's time for a rest. But next week it's AES in San Francisco and we're looking forward to seeing you there. At the show we will be previewing the latest software release for the APx585 multichannel audio analyzer. There's a brief description below, but a hands-on demo is much better. Don't forget, if you haven't already arranged for your Exhibit Pass, you can get one at no charge courtesy of Audio Precision through all of next week. See Events below for instructions. Bruce AP will be previewing the new 1.1 release of the APx500 Measurement Software at the AES Convention in San Francisco. Come to our booth (#526) to see the latest functionality in action. For those of you who haven't seen the APx585 in person, this is an excellent opportunity to see the power of the world's first true multichannel audio analyzer with one click measurements, a single saved project file, and automatically generated HTML reporting.
Talk to us Don't have your Exhibition pass yet? AES will be disabling this Preregistration form early next week. If you're still in need of a pass and Preregistration is closed, email audio.tst@ap.com and we will email you a pass. Sound Advice: Audio Test Q&A
The importance of input range Audio Precision's analyzers are called upon to measure audio signals that range in level from micro volts to more than 100 volts. This can create a total system input range greater than 140 dB. There is no modern hardware capable of making accurate audio measurements over such a broad range. In fact the most accurate analog RMS voltage meters have a dynamic range around 60 dB. In order to address this, all of Audio Precision's audio analyzers have multiple input voltage ranges. By attenuating or amplifying the input signal as appropriate, it can be measured in the most sensitive and accurate range of the hardware. Audio Precision's analyzers all support automatic input ranging where the system dynamically adjusts the input range setting based on the signal being measured. However, in some measurement situations such as when measuring burst signals this autoranging is inappropriate. In these cases it is best to disable autoranging and manually fix the input range to the peak level of the expected signal. Test Results: AP News & Events
AP News Microsoft selects SYS-2722 as official audio analyzer for Vista audio fidelity testing. To simplify ordering, Audio Precision has created a special product configuration of the Please contact your local Audio Precision Sales Partner to purchase or to answer any questions. If you already have a SYS-2722A, you may buy and install the additional filters separately. Events Use this link for a complimentary pass, courtesy of Audio Precision: AES will be disabling this Preregistration form early next week. If you're still in need of a pass and Preregistration is closed, email audio.tst@ap.com and we will email you a pass. |
