David A. Rich, Ph.D.

Harman Kardon HK 990 Stereo Integrated Amplifier with Digital Room Correction and Dual Subwoofer Bass Management – Part II

This second part of the HK 990 review examines the signal flows in the HK 990 dual-domain integrated amplifier. This analysis is relevant to all units, including modem AVRs, with a DSP signal processing unit in the main signal path. The signal flow is more transparent in this stereo unit than a 7.1 multichannel unit; so, if you are interested in AVR, please stay tuned in to Part II.

TVs? We Don’t Need no Stinking TVs – Third-Generation Multi-channel Audio – Part 3

It is useful to have the Blu-ray player read downloaded MP3, FLAC, and WAV files off a memory stick. If the player is well designed, the MP3 files should display information on the work and the performer on the TV screen. FLAC files encoded at sampling rates of 96kHz, or a sampling rate or 192kHz, should be bit-accurate at the both the S/PDIF or HDMI outputs. Be careful; many Blu-ray players do not support FLAC data files.

Most Blu-ray players USB ports will also work with Hard Drives. Another option on many Blu-ray players is to find music across a computer network if you establish an Ethernet connection for the Blu-ray player to your computer router. Special software must be resident on the computers. How to do this is way out of the scope of this article.

It is most important that your Blu-ray player should read MP3, FLAC or WAV files that are burned to DVD on a computer.......

See Sidebar: The Impracticality of Analog or DSD signal-transfer in multichannel

TVs? We Don’t Need no Stinking TVs – Third Generation Multi-channel Audio – Part 1

Conceptually, multichannel audio makes abundant sense. Practically, however, it has failed with a critical mass of listeners. Quadrasonic sound, circa 1971, was the first setback. While modern analysis of optimal multichannel reproduction now reveals the unfavorable placement of the rear channels, its primary undoing was the intractable challenge of lifting four high-quality discrete channels off a vinyl record.

Ten years ago, the industry tried again with optical disc media. A format war, coupled with the need for special equipment, resulted in little consumer interest, which was already a crowded space with the advent of home theater and portable MP3 players. The Blu-ray audio disc is the new promising third iteration owing to its seamless compatibility with home theater installations.

The audiophile and videophile have not merged into one species........This three-part series outlines the general concepts of an audiophile-friendly third-generation multichannel audio system.