Currently, WebAudio supports a BiquadFilterNode that implements very specific 2nd order (biquad) IIR filters. These are quite useful, but the specification does not allow specifying 1st order filters and higher order filters must be created by cascading biquad filters together. It can be shown that the current biquad filters can be used to create any higher even-ordered filter, but decomposing such higher order filters into biquads is fairly difficult because it requires solving a large order polynomial for the roots.
To simplify this and to allow 1st order filters, an IIRFilterNode is proposed where the coefficients of the filter can be directly specified.
Firefox: No public signals
Internet Explorer: No public signals
Safari: No public signals
Web developers: Positive
To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+...@chromium.org.
Raymond Toy
unread,
Jul 30, 2015, 11:29:17 AM7/30/15
Reply to author
Sign in to reply to author
Forward
Sign in to forward
Delete
You do not have permission to delete messages in this group
Copy link
Report message
Sign in to report message
Show original message
Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message
to Philip Jägenstedt, Hongchan Choi, TAMURA, Kent, blink-dev
Sorry about that. You can find the merged version (unofficial) at http://rtoy.github.io/web-audio-api/#the-iirfilternode-interface. This is temporary, of course. We don't expect any major changes since the general idea was accepted as Hongchan pointed out; the final design was basically waiting for me to design it.
Philip Jägenstedt
unread,
Jul 31, 2015, 9:46:22 AM7/31/15
Reply to author
Sign in to reply to author
Forward
Sign in to forward
Delete
You do not have permission to delete messages in this group
Copy link
Report message
Sign in to report message
Show original message
Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message
to Raymond Toy, Hongchan Choi, TAMURA, Kent, blink-dev
Thanks, LGTM2!
Chris Harrelson
unread,
Aug 3, 2015, 1:45:51 PM8/3/15
Reply to author
Sign in to reply to author
Forward
Sign in to forward
Delete
You do not have permission to delete messages in this group
Copy link
Report message
Sign in to report message
Show original message
Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message
to Philip Jägenstedt, Raymond Toy, Hongchan Choi, TAMURA, Kent, blink-dev