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Sennheiser’s New SDW-5000 DECT Cordless Headsets

A Polycom VVX-600 and Sennheiser DW Pro2 headset are my workaday tools of choice. They have been for years. Polycom VVX remains best-in- class. The DW Pro 2 gives me hands-free flexibility and cordless mobility, sufficient to reach the coffee machine, which is clearly a critical issue.

This pair addressed my quest for practical tools leveraging HDVoice. They explain why I’ve not put much effort into reviews of new desk phones in recent years. The matter has been largely settled hereabouts.

However, they not perfect. There’s room for improvement. In particular, the advent of WebRTC brought a tide of Opus-capable services that would benefit from full-bandwidth audio. The 16 KHz sampling required to support G.722 was great in 2010, but nearly a decade down the road it seems more than a little limiting.

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Pixel Receives Pie

Today my Pixel phone received an update that was reported to be Android Pie. This was the general rollout of Pie, which is Android 9.x. Since I participate in the beta program I’ve actually been running an earlier version of…

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Logitech Rally: A New 4K PTZ Webcam

It was almost 5 years ago that I first posed the question, “Where are the USB 3.0 webcams.” They seem to have finally arrived. Logitech’s Brio is now over a year old. Their MeetUp product, not exactly a traditional webcam, is well suited to smaller meeting rooms, aka “huddle rooms.”

Vaddio and PTZ Optics each have several models available, although they remain focused on 1080p models. A USB 3.0 webcam can deliver uncompressed 1080p30 to a host application, which means that the application doesn’t need to specifically configure the camera for MJPEG or H264 modes.

Logitech Rally Camera

Earlier this year, Logitech teased the availability of a new webcam. This new model, known as Rally, rides atop their webcam lineup, a 4K PTZ camera for video conferencing applications.

As to the basics, Rally connects to a host via USB 3. The connection on the camera itself is USB 3 type C, with a 2.2m C-to-A type cable provided. USB is the sole interface, which sets Rally apart from some of its competition, which may also provide SDI or Ethernet interfaces.

The camera supports UVC 1.5, able to deliver uncompressed, MJPEG or H264 encoded streams. It can deliver 1080p, 720p at 30 fps and 60 fps.

A 15x lens with a 90 degree field-of-view fronts a 13 megapixel sensor delivering up to a 4k30 stream.

The PTZ mechanism provided +/- 90 degrees of movement left-right. Tilt range is from +50 to -90 degrees. When turned off the camera swings down to the –90 degree position effectively providing a privacy shutter.

When mounted upside down the camera automatically senses this, inverting the output image. This makes ceiling mounting a especially simple.

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Koss Presents Two Issues: Gaming & Wireless Headphones

The past week or two I’ve been revisiting Koss, the legendary makers of headphones. Koss invented stereo headphones (they called the “Stereophones”) in 1958. They’ve mostly be known for headphones, although they have made a few communications headsets over the years.

Koss GMR-540 Series Gaming Headphones

It had been a while since I reviewed a headset suitable for use by interpreters using ZipDX multilingual. Then I stumbled upon the Koss GMR-540 Series. Introduces in the summer of 2017, these are relatively inexpensive headphones targeting gamers. As such, they have a microphone.

KOSS-GMR-545-vs-GMR-540

More interestingly, the microphone is part of the cable, which can be completely removed from the headphones. The maker provides each headset with two cables;

  • A short (4 foot) cable with an inline microphone, suitable for use with a mobile phone, tablet or laptop.
  • A long (8 foot) cable with a boom-mounted microphone, suitable for use with a desktop computer or gaming console.

Depending upon which model you choose, the long cable will terminate in dual 3.5mm mini-plugs for mic & headphones, or a USB connector.

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