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Audio analyzer tests HDMI, Blu-ray quality

Posted: 17 Apr 2008     Print Version  Bookmark and Share

Keywords:audio analyzer  HDMI  audio testing 

Audio Precision has introduced the APx585 multichannel audio analyzer with HDMI, said to be the first audio analyzer with HDMI and Blu-ray audio testing capability. According to the company, the product improves HDMI audio quality measurement on devices like surround-sound receivers, HDTVs and DVDs, STBs, and Blu-ray Disc players.

In addition, the device is said to ease troubleshooting of component compatibility and downsampling, downmixing and transcoding issues by enabling the replacement of the consumer audio devices typically used for such testing with a controlled audio source. The APx HDMI option for the APx585 audio analyzer includes a fully compliant HDMI 1.3A source and sink interface that can generate and analyze test signals in real time on up to eight channels.

In addition to linear PCM audio streams, APx can generate lossless formats such as Dolby TrueHD and dts-HD Master Audio, and compressed formats such as Dolby Digital and dts Digital Surround. All signals are available in 24bit 48kHz versions; the linear and lossless tones can also be generated at sample rates up to 192kHz.

The video signal required for HDMI can be passed through from the user's source, or can be generated by the APx585. Video formats and HDCP encryption can be toggled to test for effect on embedded audio.

A Blu-ray test disc with high-resolution versions of a wide selection of audio test signals for testing Blu-ray Disc players is included with the instrument. Formats on the disc are the same as those supported by the APx generator. The 300+ tones are accessible via video menus.

"The days of jury-rigged HDMI audio testing are over and you can hear the sighs of relief across the world," said Bruce Hofer, co-founder and chairman of Audio Precision. "APx will significantly speed up the development cycle and allow a degree of confidence that's only possible with high precision instruments."

The HDMI option can be ordered with a new APx585 audio analyzer or installed as an upgrade to a current instrument. The first orders are scheduled to ship in mid-summer 2008.

- Rich Pell
Audio DesignLine

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