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Re: Web Audio API questions and comments

From: Anthony Bowyer-Lowe <anthony@lowbroweye.com>
Date: Thu, 21 Jun 2012 12:17:18 +0100
Message-ID: <CAMCSOPV96v=GshSmccSh9eApL=5bZsSqXG4Yd9frP1LDmF3GHg@mail.gmail.com>
To: Marcus Geelnard <mage@opera.com>
Cc: Joe Turner <joe@oampo.co.uk>, Chris Rogers <crogers@google.com>, public-audio@w3.org
On 21 June 2012 12:02, Marcus Geelnard <mage@opera.com> wrote:

> Den 2012-06-21 12:21:40 skrev Anthony Bowyer-Lowe <anthony@lowbroweye.com
> >:
>
>> (Of course, why you'd want to add a DC offset in the first place to an AC
>> signal is something of mystery to me but exploratory DSP respects no
>> limits.)
>>
>
> I believe this comes into good use when controlling some AudioParams (i.e.
> using the output of an AudioNode as the input to an AudioParam), e.g. if
> you want to use an LFO (whose original signal varies between -1 and +1) for
> oscillating the frequency parameter of a filter between 8000 and 13400 Hz.


Ah, good point - thanks!

I must confess that I haven't yet dabbled with AudioParams whatsoever, and
my brain is still happily stuck in analogue modular land where I simply
plumb a cable into a destination modulation input with associated scaling
knob at that end.


Anthony.
Received on Thursday, 21 June 2012 11:18:01 GMT

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