Sunday, October 28th 2012

Audio Precision ASIO Driver Bypasses Windows Audio for Direct Testing of Pro-Audio IO

Audio Precision, the recognized standard in audio test, today demonstrated its new ASIO driver, used to bypass Windows audio when testing pro audio PC interfaces connected by USB, Firewire or PCI.

ASIO is a PC audio driver technology developed by Steinberg Media Technologies GmbH (and since adopted across the pro-audio industry) that allows audio software to communicate directly with connected audio hardware with extremely low latency, high channel count and bit-transparent transfer of data.

In APx500 v3.1, connected audio interfaces with installed ASIO drivers appear within the APx software as one of APx's I/O options, with support for up to 16 bidirectional channels. All measurements and test sequences in APx may be used via the ASIO interface, allowing for complete characterization of the connected audio device.

A typical configuration might be APx's low noise analog output to a professional analog-to-digital-converter (ADC), which streams converted digital audio to the PC via USB. Within the APx software, the ADC will appear as a selectable audio input. To test the device, APx would send an analog signal out to the device's analog input and compare that output to the resulting audio stream within the PC.

ASIO and PC Audio
ASIO is widely used on Windows-based PCs for professional recording and production because audio interfaces that rely on the native Windows drivers typically experience latency and unknown gain, distortion and resampling. Using an ASIO driver in a test & measurement situation ensures that it is the performance of the device under test being measured, not the unknown effects of the Windows operating system interfering with the measurements.

Price and availability
ASIO is standard for APx525 and APx585 families as part of the APx500 v3.1 update available now for download at The APx 515 production test analyzer supports any two channels of ASIO at one time and requires the ASIO software option (SW-ASIO, $750) or the APx515 software bundle 2 (SWB-2, $1500). Prices quoted are valid in the US and may vary in other countries.
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5 Comments on Audio Precision ASIO Driver Bypasses Windows Audio for Direct Testing of Pro-Audio IO

The Exiled Airman
i see ms griping about this but Honestly I like this, too bad all Audio cards cant have this driver type used even EAX...
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SuperSonic X 316
Sounds to me that it works like OpenAL / Creative Alchemy do under Vista and above. I miss native DirectSound 3D in Windows.
Posted on Reply
SuperSonic X 316, post: 2760618"
Sounds to me
pun intended? :)
Posted on Reply
Can we have hardware 3D sound back now? Seriously, anyone that played Thief, Unreal or FEAR knows what big difference is between today's garbage sound and the ones that used Aureal3D or EAX...
Posted on Reply
SuperSonic X 316

claylomax, post: 2760691"
pun intended? :)
I saw it as I was typing it and decided to leave it like that.
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