Based on feedback from OEM and IHV partners Microsoft extended the date to June 1, 2007 for enforcement of the Audio Fidelity tests (SYSFUND-0118 and SYSFUND-0127). After June 1, 2007 complete and passing audio fidelity test logs must be provided for any submissions after June 1, 2007. System submissions with failing audio fidelity test logs will no longer be allowed.

The Windows Vista Logo Program (WLP 3.0) for hardware includes two audio fidelity requirements for Windows Vista--a Premium logo requirement (SYSFUND-0118) and a Basic logo requirement (SYSFUND-0127)—that define the minimum bar for audio fidelity quality on a Windows Vista PC. To validate audio fidelity requirements in the Windows Vista timeframe, a new suite of tests has been introduced in the DTM that require a specific piece of testing equipment, the Audio Precision (AP) SYS-2722 audio analyzer.

This means that system vendors have the option to purchase an AP analyzer in order to run these tests in-house, or to have the testing performed by a third-party test house already equipped with an AP, such as SEZZO Labs.

The WLP 3.0 requirements also include audio fidelity numbers for other values that will be tested against in future releases of the DTM. The Fidelity Test will validate both input and output jacks on the system and will be required to pass. Future test logs will be required to be submitted from identical systems; this includes identical system device configuration as well. Only audio fidelity test logs can be imported, all other tests must be run together on the primary system under test. This is the preferred/recommended import scenario.

Other audio-related tests that are required as of June 1, 2007 include:

• AUDIO-0006 - Audio solution delivers a premium high-fidelity audio experience
• SYSFUND-0118 - Premium system audio solution delivers a high-fidelity audio experience
• AUDIO-0025 - Digital audio record and playback meet basic performance requirements for audio device
• AUDIO-0008 - Standalone microphone array device complies with the Microsoft USB Audio 1.0 design guidelines and Microsoft Microphone Array Design Guidelines
• SYSFUND-0067 - System that includes microphone array hardware follows the Microsoft microphone array hardware design guidelines
• AUDIO-0011 - A single HD Audio codec port is used for a single connector
• SYSFUND-0139 - A single HD Audio codec port is used for a single connector
• AUDIO-0017 - HD Audio solution supports jack-presence detection for analog jacks
• AUDIO-0020 - Pin configuration register for an HD Audio codec has specific settings for port connectivity field depending on implementation
• AUDIO-0022 - HD Audio Codec Pin configuration register defaults: Sequence numbers within the same default association are unique
• SYSFUND-0049 - System uses the HD Audio device pin configuration registers to expose logical devices supported by the Windows UAA HD Audio class driver
• SYSFUND-0047 - System includes hardware for at least two capture and render scenarios
• SYSFUND-0048 - Noise on the signal from the audio device generated by system components is -80dB FS or better
• SYSFUND-0050 - System employs anti-pop measures on all system audio outputs
  

When Microsoft released Windows Logo Program (WLP) specification for Windows Vista, it had significant impact on the audio development and logo submission process. Audio devices and drivers must pass the Audio Fidelity logo tests in order to qualify for logo for Windows Vista. The AUDIO-0006 and AUDIO-0025 logo requirements now show a requirements date of June 1, 2006 rather than June 1, 2007. System logo submissions must include an audio device and optional 3rd-party audio driver which have passed the audio fidelity logo tests, even though the systems themselves do not need passing logs until June 1, 2007. Audio Fidelity logs including the results from an Audio Precision test set are required for ALL logo submissions for Vista.

The following chart lists the audio fidelity requirements contained in AUDIO-0006, AUDIO-0025, SYSFUND-0118, and SYSFUND-0127, showing the fidelity requirements for Basic and Premium logos. Additionally, the Premium logo requirements have separate sections for desktop and laptop systems

SEZZO Labs provides complete audio fidelity logo testing services. WHQL logs from can be included with device and system submissions, so you don't need to purchase an Audio Precision analyzer and you don't have to spend time training someone to use it.