Professional measurement systems by www.dr-jordan-design.de
Measurement examples with WinAudioMLS by www.dr-jordan-design.de
This document shows measurement examples for the following consumer soundcards. Creative Labs Extigy USB device CMI8338 PCI device Terratec Aureon 5.1 Sky
Focus is on dynamic range and frequency response. Measurement setup: The inputs (line or mic) are directly connected with the outputs of the soundcards. For mic input testing a resistor divider is used (1:500). The soundcards are used in full duplex mode. We use single tone and MLS signals generated with the signal generator, which is part of WinAudioMLS. Creative Labs Extigy USB device 1) Distortion and noise analysis Line input Sine input with 1378.125 Hz FFT size is 2048 Weighting with A curve Windowing with Blackman

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2) Distortion and noise analysis Line input Sine input with 10kHz FFT size is 8192 Weighting with A curve Windowing with Blackman Sample rate 44100Hz
The Extigy shows extremely high distortion at higher frequencies. This effect occurs for 44100Hz sample rate, only. At 48000Hz the spectrum is clean. From our point of view this is a severe bug in the Extigys firmware.

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3) Distortion and noise analysis MIC input Sine input with 1378.125 Hz FFT size is 1024 Weighting with A curve Windowing with Blackman input gain is at max

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4) Frequency response Line input MLS measurement MLS size is 4095 FFT size is 1024
Bandwidth is limited to 17kHz. Even much cheaper devices have a better bandwidth. Nevertheless, this product has many advantages. The frequency response can be compensated with a reference measurement by WinAudioMLS.

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5) Frequency response Mic input MLS measurement MLS size is 4095 FFT size is 1024 gain is at max

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CMI8338 PCI device 1) Distortion and noise analysis Sine input with 1378.125 Hz FFT size is 2048 Weighting with A curve Windowing with Blackman

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2) Frequency response MLS measurement MLS size is 4095 FFT size is 1024
This low-cost device has an almost ideal frequency response.

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Terratec Aureon Sky 5.1 PCI device 1) Distortion and noise analysis Line input Sine input with 1000 Hz FFT size is 2048 Weighting with A curve Windowing with Blackman

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2) Frequency response Line input MLS measurement MLS size is 4095 FFT size is 1024

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IO Plus PocketDisk review ( Review, Preview, Article, Interview, Q&A, Buy, Game )

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IO Plus PocketDisk review

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The Pocket Disk IO Plus Reviewed by Ala Shiban

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A bit about IO Plus IOP is a leading connectivity, communications, and periph manufacturer that designs, distributes and markets comp USB (Universal Serial Bus) 1.1 / 2.0 and FireWire 1394 re products, and portable/removable storage solutions.

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The Pocket Disk Whats similar about a floppy disk, George Bush and an a you guessed it, small storage places. Ever since the old ages of PC, we used floppy disks, color ones, over-formatted ones, protected ones, specially case tasty ones, psychedelic ones and even plain cheap ones. evolution (for all you non-believers out there) has taught thing, and one thing alone, is never leave a monkey alon become a human and take your job! Indeed, the floppy has become less and less a must the more and more people simply prefer different, more com alternatives. CD-RWs are all the latest buzz, as you can

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2/24/2003

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extremely fast one for around 50$ and you could burn all media you want, fast and efficiently. And then, theres the USB disks, youre probably wonders we go, hes going to sell us that thing again, seen it comi well, youre basically right. Ill start by pointing out what makes USB disks so remark useful, and then address what makes the Pocket Disk itse more to offer. Size How many times have you wanted to take a pack of docu files, go down to the office or friend and print it out? How the latest game patch that your friend simply doesnt hav I could mention a gazillion and a half reasons for the usa its drive space, were talking about models that range up 16MB till 512MB (double increments), this would give you space than any floppy drive in the world could give you, n mention the availability of USB slots in pretty much any date computers. Reliability This is where its all about, forget about how big a USB Di be, it does come down to whether its usable and reliable, Flash memory simply is. Floppy disks are extremely subjected to being banged do thrown into waste for going bad, they dont even last tha anymore. Storing files on the PocketDisk will simply leave you feelin about the files being there, chances of them going bad is virtually non existent. Mentioning the standard feature list of USB disks is all nic dandy, but it does come down to what this piece offers m here we go The Package Heres what you get from the guys at IO Plus:

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Neck Strap
You can see all that in the pictures below, the neck strap useful but the extension cable is without a doubt a must less fortunate ones. I was quite bummed about reviewing knowing Ill have to crawl in and out from under my table this in, to my pleasant surprise, they included an extensi that makes it much easier to use.
Driver CD is useless unless you have a Windows98 config on Windows XP I simply plugged it in; within 5 seconds t was up and accessible through the usual Windows interfa removable disk. Design The design on the PocketDisk is remarkable; it looks professional, up-beat, straight forward and extremely slim design elements make it a great companion on your key pocket, anywhere that you could fit half a Cell phone. This PocketDisk here is Light, I was given the 16MB one t out, and it feels empty from the inside, as if all that exis the external plastic, being so light also helps its mobility, it the grand successor to a floppy disk. Also on the Pocket Disk is a light led that once connected up to let you know its operational and ready to go, again usability and comfort. Performance KaBLaash! Its that fast, itll basically use as much as pos the bandwidth available from the USB 1.xs. Thats basica 950KB/s read speed and 600KB/s write speed (beat that Disk!), Ive tested the PocketDisk with Sanda 2002 Pro, a you can see from the picture below, it does outrank the ones they tested.

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Conclusion USB Disks in general? Replacing floppies, so get one, eve small one, itll come in handy Sometime (when you least it), personally Ive removed my floppy disk drive because it to be useless (and no, I dont miss it or need it). The PocketDisk? Slick design, great performance, packag includes all you need and the price is as low as 24$ for th model. Definitely a bronze award winner for being easy to use, fa reliable, well designed, light weighted and low priced. You can check out this product at their online store as we other useful connectivity solutions they offer.
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