W3C home > Mailing lists > Public > public-audio@w3.org > July to September 2013

Re: [web-audio-api] OfflineAudioContext and ScriptProcessorNodes (#69)

From: Olivier Thereaux <notifications@github.com>
Date: Wed, 11 Sep 2013 07:29:34 -0700
To: WebAudio/web-audio-api <web-audio-api@noreply.github.com>
Message-ID: <WebAudio/web-audio-api/issues/69/24244185@github.com>
> [Original comment](https://www.w3.org/Bugs/Public/show_bug.cgi?id=22723#8) by Srikumar Subramanian (Kumar) on W3C Bugzilla. Fri, 19 Jul 2013 22:08:49 GMT

Another point I wondered about is whether the "back and forth" between the audio processing thread and the main thread to process a script node will force sub-realtime rendering for offline audio contexts in current browser architectures. 

Currently, it is not unreasonable to expect a delay of 4ms between event firing and callback invocation. That limits the number of calls that can be made to a script node to 250 calls per second. If a block size of 128 is used, that might limit the rate of generating audio samples to 32KHz. The longer the event->callback delay, the worse this gets.

---
Reply to this email directly or view it on GitHub:
https://github.com/WebAudio/web-audio-api/issues/69#issuecomment-24244185
Received on Wednesday, 11 September 2013 14:30:05 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 19:03:24 UTC