Float denormal issue in JavaScript processor node in Web Audio API (3) from Stéphane Letz on 2014-06-20 (public-audio@w3.org from April to June 2014)

From: Stéphane Letz <letz@grame.fr>
Date: Fri, 20 Jun 2014 14:21:18 +0200
To: "public-audio@w3.org Group" <public-audio@w3.org>
Message-Id: <F5ABEFE3-074D-4993-AC12-2B586BA721B4@grame.fr>

To see the problem, here is a piano physical model in C++ compiled in asm.js using emcsripten. A single string is then duplicated (for "bug" demonstration purpose) 16 times, so 16 strings are computed all the time.

http://faust.grame.fr/www/piano.html

Chrome CPU  here ==> 36 %

Hit the "gate" button to play a same note on all 16 string, wait some seconds, CPU raise to 100%

Same issue with Firefox and Safari WebKit.

Stéphane Letz

Received on Friday, 20 June 2014 12:21:52 UTC