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FW: Contrast Tool

From: David MacDonald <david100@sympatico.ca>
Date: Mon, 23 May 2011 20:45:53 -0400
Message-ID: <BLU0-SMTP83FDA9F7C07B652DFF2677FE750@phx.gbl>
To: "'w3c-waI-gl@w3. org'" <w3c-wai-gl@w3.org>

E-Ramp in Conjunction with Trace Research and Martyn Shaw created the Audio
Contrast Analyser tool for Audacity recording software, to measure
foreground speech against background noise as per SC 1.4.7. The tool checks
to see if the background noise, whatever it may be, is at least 20 dBs less
than the speech.

The Audacity Audio Contrast Analyser is now non-modal, which means the
dialogue box can remain open while the foreground speech and background
audio noise are selected on the recording file. So I've updated the help
file for it, which is online, linked from the Help button of the Audio
Contrast Analyser Dialogue Box. The new help file can also be found directly

Audacity, a free audio recording tool can be downloaded here.

David MacDonald

Received on Tuesday, 24 May 2011 00:46:46 UTC

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