Category Archives: Uncategorized

apple, mobile, tablets, Uncategorized, windows

Microsoft Surface 2: still a hard sell at retail

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I am a fan of Microsoft’s Surface 2; but looking at the display at Dixons in Heathrow’s Terminal 3 it is obvious that Microsoft has work to do in terms of retail presence.

There are no clues here as to why anyone might want to buy a Surface, and no indication that Surface 2 runs anything other than standard Windows 8, other than the two letters RT which you can read on the spec summary.

Windows RT is both better and worse than Windows on Intel. It is worse because you cannot install new desktop applications, but it is better because it is locked down and less likely to suffer from viruses or annoying OEM add-ons and customisations that usually result in a worse user experience.

Why did Microsoft not come up with a distinctive brand name for RT, such as AppWindows or StoreWindows or WinBook? I am open to negotiation should Microsoft wish to use one of my brand ideas 🙂

Surface 2 has excellent performance, Microsoft Office is bundled including Outlook (though without the ability to run Visual Basic macros), and it is expandable using Micro SD cards or USB 3.0 devices, all features I miss when using an Apple iPad.

I do use the desktop a lot on Surface 2. Simple applications like Paint and Notepad are useful especially since they have, you know, cool resizable and overlapping windows so you can have multiple applications on view.

The Apple iPad is better displayed and I am sure its greater prominence is more than justified by relative sales.

 

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Microsoft financials: nearly a $billion lost on Surface RT but prospering in server and cloud

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Microsoft has reported fourth quarter and full year results for its financial year ending June 30th 2013.

I am in the habit of tracking the results quarter by quarter with a simple table:

Quarter ending June 30th 2013 vs quarter ending June 30th 2012, $millions

Segment Revenue Change Profit Change
Client (Windows + Live) 4411 +259 1099 -1323
Server and Tools 5502 +452 2325 +285
Online 804 +69 -372 +6300
Business (Office) 7213 +889 4873 +745
Entertainment and devices 1915 +134 -110 -142

What is notable in the figures? Windows profits are down, not so much due to declining PC sales but rather this:

These financial results include a $900 million charge, or a $0.07 per share impact, related to Surface RT inventory adjustments.

That said, Microsoft reports that after adjusting for deferred revenue, Windows client decreased 6% quarter on quarter and 1% for the full year, so the PC decline is having an impact.

Business, which includes Office, SharePoint and Office 365, is performing well and the company reports $1.5 billion annual revenue for Office 365.

Server and Tools (almost all Server) continues to shine:

Server & Tools revenue grew 9% for the fourth quarter and 9% for the full year, driven by double-digit percentage revenue growth in SQL Server and System Center.

Even Online, which is essentially Bing-related advertising income, is showing signs of life, despite yet another loss:

Online Services Division revenue grew 9% for the fourth quarter and 12% for the full year, driven by an increase in revenue per search and volume. Bing organic U.S. search market share was 17.9% for the month of June 2013, up 230 basis points from the prior year period.

Windows Phone is hidden in Entertainment and Devices, which reported a loss despite $1.9 billion revenue. Microsoft says:

Windows Phone revenue, reflecting patent licensing revenue and sales of Windows Phone licenses, increased $222 million.

This means that Xbox is slightly down but overall revenue slightly up thanks to Windows Phone.

Overall both revenue and profit are a little higher than the previous year.

Losing a billion dollars on Surface RT is careless. Put simply, Microsoft ordered far too many of its experimental new ARM-based version of Windows, at a time when few new-style apps were available. I do not regard this as proof that the entire concept was wrong, though it is a significant mis-step however you spin it. See further post coming shortly.

apple, gadgets, mobile, reviews, smartphones, Uncategorized

Make your iPhone a close-up or wide-angle camera with Olloclip

Here’s a gadget I came across at Mobile World Congress earlier this year. The Olloclip is a clip-on supplementary lens for the iPhone or iPod Touch, giving it three new modes: wide-angle, Fisheye, and Macro.

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In the box you get the reversible lens with covers for each end, an adapter clip for the slimmer iPod Touch, and a handy bag.

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The lens clips onto the corner of the iPhone, covering the on/off button. There are different models for the iPhone 4/4S and iPhone 5, which is a drawback. Every time you upgrade to a new iPhone, you will have to buy a new Olloclip, or do without it. You also lose use on the on/off button when the Olloclip is attached.

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Still, that is a small price to pay if you get amazing new photographic capabilities, and to some extent you do. I was particularly impressed by the macro mode. Here is my snap of a coin getting as close as I could quickly manage with the iPhone 4 alone:

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Snap on the Olloclip, and I can capture a world of detail that was previously unavailable.

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I also tried the wide-angle and fisheye modes, both of which work as advertised.

The twist here is that the Olloclip gives your iPhone camera features which your purpose-built compact camera may not have. If you want or need to take the kind of shots which the Olloclip enables, it is a great choice, spoilt a little by the inconvenience of clipping and unclipping the lens.

   

microsoft, mobile, professional, Uncategorized, windows

Windows Phone 8 enterprise security versus Blackberry 10 Balance and Samsung Knox

How good is Windows Phone 8 security? Actually, pretty good. The key features are described here [pdf]:

  • Trusted Boot prevents booting to an alternative operating system, using the UEFI secure boot standard.
  • Only signed operating system components and apps can run.
  • App sandboxing:

    No communication channels exist between apps on the phone other than through the cloud. Apps are isolated from each other and cannot access memory used or data stored by other applications, including the keyboard cache.

  • Private internal app distribution by businesses who register with Microsoft
  • Password policies set through Exchange ActiveSync (EAS)
  • Built-in device management client
  • Bitlocker encryption when set by EAS RequireDeviceEncryption policy. AES 128 encryption linked to UEFI Trusted Boot.
  • SD card data is not encrypted, but the OS only allows media files to be stored on SD cards.
  • Information Rights Management can prevent documents being edited, printed, or text copied (other than tricks like photographing the screen).
  • Remote Wipe

The security features in Windows Phone 8 are largely based on those in full Windows, since the core operating system is the same. However, devices are more secure since they are not afflicted by the legacy which makes desktop Windows hard to lock down without damaging usability.

While the above sounds good, note that in most cases a simple PIN will get you access to everything. On the other hand, unless the PIN is seen it is not all that insecure, since you can set policies that lock or wipe the phone after a few wrong attempts.

Does Microsoft therefore have a good story versus Blackberry 10 Balance and Samsung Knox, both of which feature secure containers that isolate business apps and data from personal? The approach is different. In Windows Phone the focus is on the whole device, whereas the other two have the concept of segmentation, letting users do what they like (including installation of games and so on) in one segment, while the business gets to control the other.

Windows Phone does in fact have a somewhat similar feature aimed at children. Kids Corner lets you create a "fun" segment containing specified apps and games, sandboxed from the main operating system. While this is currently designed for children borrowing your phone, you can see how it could be adapted to create a personal/business split if Microsoft chose to do so.

For the time being though, you might worry about the potential for users to install a malicious app or game that manages to exploit a bug in Windows Phone and compromise security.

Even if the business can lock down the device so that users cannot install apps, this impairs the user experience to the extent that most users will want another phone for personal use. The attraction of the Blackberry and Samsung approach is the way it combines user freedom with business security.

Is Microsoft doing a good job of articulating the enterprise features of Windows Phone 8? That is a hard question to answer; but my observation is that Nokia, the main Windows Phone vendor, seems to focus more on consumer features like the camera and music, or general features like maps and turn by turn navigation. Enterprise features are hardly mentioned on the Nokia stand here at Mobile World Congress in Barcelona, while Microsoft does not have a stand at all. On the other hand, you would think that the company’s strong partner ecosystem would be effective in communicating the presence of these features to enterprises.

apple, google, microsoft, mobile, software development, Uncategorized

Power shifts at Mobile World Congress: Samsung rises, Apple absent, Google hidden, Microsoft missing

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Mobile World Congress, now under way in Barcelona, is a big event. Exact numbers are not available, but I have heard talk of 70,000 trade attendees; it is not something you can safely ignore if you have a presence in the mobile industry.

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Nevertheless Apple chooses to ignore it, preferring its own exclusive events. This is a strategy that has worked in the past, but this year it may be less clever. Several have said to me that Apple is falling behind, being too slow to innovate its iOS device family. Of course many here are using Apple devices, but the momentum for now is elsewhere, though one magical announcement could change that any time.

Samsung on the other hand has the biggest stand here (actually several stands) and is everywhere. The underlying story is how Samsung is moving on from being an Android device vendor and focusing on Samsung-specific features. In the consumer world that means hooks into Samsung TVs or its new HomeSync media box with a Terabyte of storage, intended to be the place for all your music and video, as well as enabling Android games in your living room.

The bigger Samsung news though is its enterprise offering, called Knox, which creates a secure, encrypted container on your Samsung smartphone or tablet exclusively for business use. IT admins have full control over access and app deployment. This is the same approach used by Blackberry with the Balance feature in its new Blackberry 10 devices. Knox is implemented by third-parties, and links with Active Directory, making this an attractive proposition for businesses getting to grips with the challenge of mobile device management.

Crucially, Knox works only with Samsung devices. It is based on a secure edition of Linux and includes a hardware element so that other device vendors cannot implement Knox, though they could create their own similar system.

Blackberry on the other hand has not taken a stand at this event. Instead, it has parked itself in a hotel across the road, which its staff informally call Blackberry Towers. The symbolism is unfortunate. Last year it had a big stand; this year it is out of the mainstream. Blackberry’s new devices look good but its key business selling point is Balance, which means it will not be happy about Samsung’s Knox.

Microsoft is a puzzle, as is not uncommon for the company. Via Windows Phone it is a premier sponsor (which I imagine means a ton of cost) but does not have a stand. Windows Phone is mainly represented by Nokia, though it can be glimpsed elsewhere such as on the HTC stand. This is a company that wants to convince us that it is a serious force in mobile? Windows 8 is meant to be a new start on tablets; so where is Surface RT or Surface Pro?

I also wonder if the company has left it too late to establish Windows Phone as the best choice for secure mobility. I have been talking to Centrify here at Mobile World Congress, one of the third-parties implementing Knox solutions. Everything in a Centrify Knox deployment is controlled by Active Directory, and it forms an elegant and secure option for enterprises who want to give employees the freedom of a personal device combined with the security and manageability of a mobile device. I also saw how app developers can query Active Directory attributes on Knox Android devices just as they would with a Windows application.

So where is Microsoft with its enterprise smartphone story? It has all the pieces, including Active Directory itself, Bitlocker for device encryption, and System Center for management, but it has not yet assembled them for Windows Phone.

At least it is better than last year when it ran embarrassing "smoked by Windows Phone" demos.

Google is another puzzle. Last year a huge stand and a hall dedicated to Android; this year, nothing. Android may have won the mobile OS wars, but do initiatives like Knox show how Google is failing to reap the benefits? Possibly. It does seem to me that Google is now engaged in differentiating its own products and services from what you might call generic Android; and its absence from Mobile World Congress is likely part of that effort.

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NVIDIA Tegra 4 chipset: faster performance, longer battery life

NVIDIA has announced the Tegra 4 chipset, which combines an NVIDIA GPU with a quad-core ARM Cortex-A15 CPU.

According to ARM, the Cortex-A15 delivers around twice the performance of the Cortex-A9, used in Tegra 3, and is able to address up to 1TB of RAM.

The Tegra 4 GPU has 72 cores, compared to 12 cores on Tegra 3.

In addition, NVIDIA is including what it calls “Computational Photography Architecture” which uses both CPU and GPU to improve photographic capability.

The part of the announcement that most caught my eye though is the claim of “up to 45 percent less power than its predecessor, Tegra 3, in common use cases”.

Tegra 4 will enable high-performance smartphones, but I am more interested in what this and other next-generation chipsets will offer for tablets. Microsoft’s Surface RT would be more compelling with Tegra 4, rather than its current Tegra 3, since it suffers from poor performance in some cases (Excel, for example) and longer battery life would do no harm either.

There will be even less reason to want a laptop.

NVIDIA’s newly announced Project SHIELD gaming portable also uses a Tegra 4 chipset.

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Microsoft’s Server 2012 Essentials: a good replacement for Small Business Server?

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Microsoft has completed Windows Server 2012 Essentials, the kind-of replacement for Small Business Server (SBS) in the Server 2012 range.

I say “kind-of” because it does not replicate the old SBS idea of bundling Windows Server, Exchange, and optionally SQL Server into a single keenly-priced bundle designed to work on one or two servers. Instead, Essentials is designed to integrate with Office 365, online Exchange and SharePoint. There is also an option to integrate with on-premise Exchange but there is no special SBS deal for purchasing this so it will be more expensive than before.

Server 2012 Essentials has the following features and limitations:

  • Maximum 2 physical processors.
  • Up to 25 users, no CALs required.
  • May not be used as a Hyper-V host, but can be installed on a virtual machine (VM).
  • Includes Active Directory.
  • Includes simplified administration console.

If you hit the 25 user limit, you can transition to Windows Server 2012 Standard, but similarly to Exchange, this will not be such good value as the old SBS Premium which supported up to 75 users, even bearing in mind that CALs were required before once you got past 5 users.

When you install you get a couple of options, clean install or server migration:

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I picked clean install. Here is the initial screen:

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Why a tablet-friendly Start screen on a server? It makes more sense that first appears, since you might be accessing the server desktop from a tablet. In fact, the dashboard is deliberately touch-friendly as well, even though it is a desktop application.

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You can integrate with Exchange:

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Alternatively you can link to Office 365, which is what I chose to do. Server Essentials does not use Active Directory Federation Services (ADFS) for single sign-on between the local domain and Office 365, but it does synchronize users and passwords. I asked why it does not do the job properly with ADFS, and was told that one reason is that the base Office 365 “P” subscriptions – which for various reasons I do not recommend – do not support ADFS.

Synchronization is useful but can go wrong. Password expiry for example is a big issue for small businesses; if passwords expire regularly by default as they do in both Server Essentials and Office 365, then users can get into difficulties with issues like smartphones where the password settings are buried. The impression I got at the press briefing is that password policy matches in Essentials and Office 365 by default, but if you change the policy in Essentials it will not automatically change in Office 365 (I hope I am wrong about this).

Server Manager is also present in Essentials. I was interested to see which roles and features are available.

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Missing from this list, compared to Server 2012 Standard, is Hyper-V and Windows Server Update Services.

Apparently you will be able to install SharePoint when this is available for Server 2012.

A strong feature of Server Essentials 2012 is a wizard to set up DirectAccess, which is called Anywhere Access here, and lets users access shared files on the server from anywhere over the internet.

Other interesting features are Storage Spaces, for cost-effective expandable and resilient storage, online backup of your data (though not yet full system backup), backup of client computers, and other Server 2012 features.

It strikes me that a smart way to set up Server 2012 Essentials would be on the free Hyper-V Server 2012. Then you could use a second Hyper-V Server and Hyper-V Replica to have a failsafe system.

But what about the question in my title: is this a good replacement for Small Business Server?

It depends. There are scenarios where this could work well, for businesses that have adopted Office 365 but still need a local server.

On the other hand, this looks like a poor deal for a business that has SBS 2011 Premium or an earlier equivalent and does not want to go the cloud route. Setting up the equivalent with full Exchange will cost more, and the advantage over plain Windows Standard 2012 is not particularly clear.

You can also argue that a small business that has gone for Office 365, having a local server is a retrograde step, introducing a maintenance burden that does not need to exist.

Nevertheless, if you meet the requirements of fewer than 25 users, this is a good value offering with most of the great features of Server 2012 available.

microsoft, Uncategorized, windows

Crisis in Microsoft land: what next after the mixed reception for Windows 8 Consumer Preview?

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Microsoft will have expected some users to find the transition from Windows 7 to Windows 8 challenging, but I doubt it was ready for the reaction from its own community that it is receiving for Windows 8 Consumer Preview.

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The best place to start is the comments on Building Windows blog here and here – at the time of writing, around 1300 comments, most from users who have downloaded and tried the Consumer Preview. It is worth browsing through them if this is something you care about; some are knee-jerk negative reactions, but some others are thoughtful and wanting Microsoft to succeed.

Overall, the message is: don’t make us use Metro, let us stay in the desktop if we choose.

I’m still waiting for an explanation as to why my 30" desktop screen has to look like a smartphone, that’s what my smartphone is for.

My users range from tech savvy to plant workers and truck drivers. Like all of us, the start button is baked into our DNA … How can I make the desktop the default UI?  I’m not going to deploy metro desktop to my users as the default screen. I would rather deploy a slew of ipads and I’m no ipad fan that is for sure.

In 17 years of using Windows I have never used the Windows key. Interestingly I’ve never seen any user of a computer use the Windows key. I don’t want to learn and remember key combinations to do things that I can currently do trivially using the start menu.

Let me tell you something, I always have a gazillion webbrowser instances and tabs open (rarely less than 50 browser tabs and as much as 100) – I often run 5-10 Visual Studio instances simultaneously (and I know your usage statistics says average is 1, so you won’t make it easier to distinguish between them, but this is a different matter..) – usually have 10+ explorer windows – and I absolutely love working this way, I am productive this way and that’s what counts for me. I run 2 big screens with 2560×1440 resolutions to give me as much working space as possible, so I can easily switch between a lot of my open applications, browser tabs and explorer windows. Even if I had a use for some Metro UI application, I would be looking for a desktop alternative, so I could have it running side-by-side with my other applications – let’s be honest, one application at a time might be great for the average joe, but it’s a horrible solution for professional users.

Part of the problem here is that the Metro UI Windows 8 is more about solving a problem Microsoft has – how to compete with the iPad – than a problem its users face. It has been clear since Windows 8 was first previewed that the tablet UI and new Windows Runtime was Microsoft’s main focus, and that desktop users would get less value than they might normally expect from a major release. The reaction to the Consumer Preview though is more serious than that: many users are saying that Windows 8 is, for them, a substantial step backwards.

I am writing this in Windows 8 on a desktop and it is not that bad. Apps are easy to launch once you get the hang of Windows Key – Search, and there are workarounds for the annoyances. There is no doubt though: if you are working mainly in the desktop – which is inevitable for most users upgrading – the “immersive UI” does get in the way at times. Since it must run full screen, a Metro app obliterates the taskbar and handy features like the time and date which shows bottom right in the notification area. If there were an option to run Metro apps in a window, I would grab it.

The irony here is that the name “Windows” refers to the ability to run multiple apps in windows, as opposed to the single application UI offered by DOS.

Another issue is that if you switch between Metro and Desktop, you have to learn two ways to do common tasks. For example, I tend to use the taskbar previews to find browser tabs, since if you have numerous tabs open it is the quickest way to find the one you want. If you are in the Metro browser though, you have to right-click to show the tabs. Right-click by mistake in the desktop browser, and you get a context menu. Add to favourites? Different. History? Different. All friction if you just want to get your work done.

If you have multiple monitors, Microsoft’s “Move the mouse to the corner” idea for raising the Charms does not work well. The “Corner” is on the primary display, but if you have multiple displays it is not a corner but the border between two screens. You have to position the pointer just so to make it work.

There is more; but it is not my intention to iterate through every annoyance. I am more interested in the reaction overall and in what Microsoft will do next.

I will add that I admire what Microsoft has done from a technical standpoint in the Windows Runtime and that Windows 8 on a touch device with the right screen size has great promise as a new tablet operating system. It is my first choice for travelling; iPad and Android tablets are too limited, and I am more than ready to leave the bulky, awkward laptop at home.

Needless to say, few of those commenting will have tried such a device, for reasons I have described before. Windows 8 in a virtual machine is a worst case, and it is a shame that so many (for good reasons) are trying it that way.

What next for Windows 8?

It seems to me that Microsoft now has, broadly, three options for Windows 8.

1. Plough on regardless. This, I imagine, is the plan as it stands currently. Microsoft has deliberately made Metro unavoidable in Windows 8, I presume to ensure that it will not be ignored. There will be some refinements in the final release, improved discoverability of features users are struggling to find, but no fundamental change to the design approach. The plan as stated last month is that there will be no further beta, and the next public release will be the release candidate.

The question: can Microsoft do enough tweaking to win over a majority of its own community? Right now my sense is probably not. A negative reaction on release will be costly for the company and for all those third-parties who depend on its platform; yes, Windows 7 will have a prolonged life, but there will be loss of momentum for the platform overall.

2. Delay Windows 8 for further refinement. Go through the reactions to this broad public beta test, and work out how to fix the issues without losing the vision behind this “reimagined” Windows. Delay would be painful, of course, but less bad than a failed release.

The quick version of this would be to do what many are asking for: make the Metro-style personality in Windows 8 optional. Would that be such a disaster?

3. Release Windows on ARM (WOA) ahead of the full Windows 8. Most of the objections users have to Windows 8 do not apply to WOA, where Metro is primary, where all devices are touch tablets, and where those desktop applications (mainly Office) and utilities that are included are there to fill the gaps which Metro cannot yet fill. As for x86, users are still happy with Windows 7. When Vista was the current version, users could not wait for the next release, but there is no such pressure with Windows 7.

audio, gadgets, mobile, reviews, Uncategorized

The best ear buds I have heard: Wolfson’s Digital Silence DS-421D with noise cancellation

At the Mobile World Congress in Barcelona last month I caught up with Wolfson Microelectronics, who make digital converter chips and other audio components. They do not sell many products to end users, but are making an exception for the Digital Silence range of noise-cancelling headsets.

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The origin of the technology here is in the company’s 2007 acquisition of Sonaptic Ltd, specialists in micro-acoustics, or in other words getting good sound from mobile devices.

The Digital Silence range is unusual among ear buds in including noise cancellation. In other words, microphones on the outside of the buds pick up external sounds, phase reverse them, and add them to the input signal so that you hear more of the music (or voice, if listening to a call) and less of the external sound.

The new Digital Silence range has three models, of which I have been testing the DS-421D, which is set for general availability shortly.

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What you get is a stereo headset with clip-on controller, spare ear foams, mini-jack adaptors to cope with the fact that some mobiles wire up their 4-pole mini-jacks differently, USB charging cable, and a black zip-up carrying case. As with most headsets, there is also a built-in microphone and answer button. By default they are iPhone-ready, but will work with pretty much any mobile or player with a standard 3.5mm mini-jack output.

The controller has a rechargeable battery, charged by a USB connection, and specified to last for 14 hours of playback. A switch on the controller enables ANC and lights a green LED to show that the battery is OK. The ear buds work without ANC as well, so if the battery gives out you still have music. In a quiet environment, you might also prefer not to use ANC in case it adds artefacts to the sound.

A button on the side of the controller marked Monitor has a dual purpose. Press it to mute the sound; or press and hold to change the ANC filter. There is no display, but the unit plays one, two or three beeps to indicate the selection:

General: 20dB cancellation across a wide frequency band

Aeroplane: Low frequency cancellation such as found in an aeroplane is emphasised.

Office: Speech frequency cancellation around 200Hz – 1kHz is emphasised

Other products in the range are the DS-101A (around £30.00) and the DS-321D (around £50). I do not have a price yet for the DS-421D itself but was told “Under £100”. The DS-101A does not have selectable filters or a call/answer button.

Sound quality

Enough of the technology, how is the sound? This is what counts, and I am impressed. The DS-421D headset sounds excellent even without ANC engaged. No amount of noise cancellation would make them good if they were poor to begin with, and I suspect this fundamental good design is actually more important than the clever processing.

I used a variety of ear-buds for comparison. My regular set are Shure SE210 noise-isolating (not cancelling) ear-buds which I find easily out-perform the ones that come free with smartphones and iPods. I was taken aback by how much better the 421D sounded. The biggest difference is in the bass extension, but the sound is also smoother but without loss of clarity. These are the first ear buds I have used where you do not feel you are compromising by not using over the ear headphones.

The noise cancelling works. Don’t have unrealistic expectations, these will not deliver “digital silence”, but they will substantially reduce the noise. It is a bit like shutting it behind a door. There is also a slight change in the quality of the sound, for the better in my opinion, being a little richer than before. I used the DS-421D on an aeroplane and on the London Underground and had worthwhile results in both cases. I could have the volume lower and still enjoy the music.

I also compared the DS-421D to a set of Sennheiser PXC 300 foldable noise-cancelling headphones. The PXC 300 was slightly more effective in killing background noise, but the reason I tend to leave these at home is that they are bulky and use two AAA batteries which give out if I forget to switch them off. The DS-421D is more convenient. As for sound quality, it is close and I might even give 421D the edge.

The DS-421D is mainly for music, but I found the headset functionality useful too. I used it for Skype on a Windows 8 tablet and it worked much better than using the built-in microphone.

Design

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The design of the DS-421D  is excellent in terms of technology, but I am not so sure about the ergonomics. The length of cable between the ear buds and the controller is short, so you cannot clip the controller to your belt. It must be on your collar or perhaps top pocket. You could leave it dangling, but it is heavy enough to be a nuisance if you do.

Visually, the design looks a bit geeky to me; not unattractive, but I can imagine the DS-421D losing out among the more fashion-conscious purchasers.

Conclusion

Regular traveller who likes music? I recommend you give these a try. Now you can have noise-cancellation and high quality sound and a small, light headset.

Technical addendum

Wolfson’s noise-cancelling system is called myZone ANC (Ambient Noise Cancellation) which the company says uses “feed-forward, rather than the usual feedback systems”.

What is that then? I hunted around and eventually found Wolfson’s white paper on the subject*. Here is an illustration of feedback versus feed-forward:

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The figure on the left is a feedback system where the microphone is placed between the loudspeaker and the ear. In the feed-forward system the microphone is external so that the external noise is detected, inverted and added to the input. An advantage is that this does not require a sealed enclosure around the ear.

The main problem with implementation is time-aligning the cancellation signal with the input signal. Wolfson’s solution:

By placing microphones at the rim of the headphone, the ambient noise signal can be acquired and driven to the loudspeaker in advance of its arrival at the eardrum, thus compensating for the intrinsic response time of the loudspeaker.

The illustration in the paper shows a ring array of 5 microphones around each headphone, but since the DS-421D is a small earbud I doubt it has such an array. There is only one visible microphone aperture. Still, this gives some indication of the technology used.

Wolfson did not invent feed-forward as far as I know, so its innovation is in the area of how to achieve accurate time-alignment of the cancellation signal.

*The paper is called Ambient Noise Cancellation for Headphones and Headsets. I cannot find a direct link, but if you go here and search for resources for the WM2002 you will find it.

tips, Uncategorized

Windows 8 Consumer Preview tip: use compatibility mode for driver installation

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I have a Kodak ESP 725o network printer, and was trying to set it up on Windows 8 Consumer Preview. The setup software detected the printer OK, then gave a strange error:

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“The application called an interface that was marshalled for a different thread.” Hmm.

The solution is to run the installer in Windows 7 compatibility mode. Doing this in Windows 8 takes a few steps. First, find the setup app in the Start menu:

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then right-click to show the options menu, or if using touch, drag the shortcut up slightly and release for the same result. Then click or tap Open file location.

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This shows the application in Explorer on the desktop. If you prefer to get there by another route, that is fine too. Right-click the executable, choose Properties, and then Compatibility. Select Windows 7 and click OK.

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Run the printer setup utility, and if you are lucky (as I was in this case) it will install the driver for you perfectly.

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