W3C home > Mailing lists > Public > public-audio@w3.org > January to March 2012

Re: fftSize requirement for RealtimeAnalyserNode

From: Alistair MacDonald <al@signedon.com>
Date: Thu, 22 Mar 2012 12:13:47 -0400
Message-ID: <CAJX8r2=h9Pkh2zOfjqY+_CA5KMy5ix+UU3oN47js8HjN3Ggj1A@mail.gmail.com>
To: Jussi Kalliokoski <jussi.kalliokoski@gmail.com>
Cc: "Wei, James" <james.wei@intel.com>, "public-audio@w3.org" <public-audio@w3.org>, Chris Rogers <crogers@google.com>
True. Will add RealtimeAnalyser to Mondays agenda, seems we have several
things to discuss here.


On Thu, Mar 22, 2012 at 12:10 PM, Jussi Kalliokoski <
jussi.kalliokoski@gmail.com> wrote:

> We should probably check from Chris R. if it's actually intended behavior
> or just a temporary implementation quirk.
>
>
> On Thu, Mar 22, 2012 at 6:03 PM, Alistair MacDonald <al@signedon.com>wrote:
>
>> Action 41 Created: https://www.w3.org/2011/audio/track/actions/41
>>
>> Does anyone want to volunteer to update the spec. documentation?
>>
>> --
>> Alistair
>>
>>           *          *          *
>>
>> The value RealTimeAnalyser Node's FFT size must be limited in the range
>> of [128, 2048], and it will throw the exception if illegal value of fftSize
>> is set.
>>
>> This is yet to be documented in the spec.
>>
>> http://lists.w3.org/Archives/Public/public-audio/2012JanMar/0460.html
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Mar 22, 2012 at 5:02 AM, Wei, James <james.wei@intel.com> wrote:
>> >
>> >
>> >
>> > For fftSize in RealtimeAnalyserNode in the spec, it only says the value
>> must be power of 2.
>> >
>> >
>> >
>> > But in fact in the implementation, the value must be limited in the
>> range of [128, 2048], and it will throw the exception if illegal value of
>> fftSize is set.
>> >
>> >
>> >
>> > Which should be documented in the spec.
>> >
>> >
>> >
>> >
>> >
>> > Best Regards
>> >
>> >
>> >
>> > James
>> >
>> >
>> >
>> >
>>
>>
>>
>>
>> --
>> Alistair MacDonald
>> SignedOn, Inc - W3C Audio WG
>> Boston, MA, (707) 701-3730
>> al@signedon.com - http://signedon.com
>>
>
>


-- 
Alistair MacDonald
SignedOn, Inc - W3C Audio WG
Boston, MA, (707) 701-3730
al@signedon.com - http://signedon.com
Received on Thursday, 22 March 2012 16:14:22 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Thursday, 22 March 2012 16:14:22 GMT