W3C home > Mailing lists > Public > public-audio@w3.org > April to June 2012

Audio-ISSUE-42 (AudioParamSampling): AudioParam sampling is undefined [Web Audio API]

From: Audio Working Group Issue Tracker <sysbot+tracker@w3.org>
Date: Tue, 15 May 2012 14:43:07 +0000
Message-Id: <E1SUIxv-00024Z-AA@tibor.w3.org>
To: public-audio@w3.org
Audio-ISSUE-42 (AudioParamSampling): AudioParam sampling is undefined [Web Audio API]

http://www.w3.org/2011/audio/track/issues/42

Raised by: Philip J├Ągenstedt
On product: Web Audio API

It is not defined how the AudioParam values (ramps or AudioNode input) are sampled. These approaches would yield hugely different results:

 * Sample-and-hold at the beginning of each processing buffer (if they exist in the implementation).
 * Correct downsampling with low pass filtering to below the Nyquist frequency for each processing buffer. This could turn a 20KHz signal into silence.
 * Continuously per audio sample at the mixing level. Slow?
Received on Tuesday, 15 May 2012 14:43:13 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Tuesday, 15 May 2012 14:43:14 GMT