Re: Hiss Effect
Re: Hiss Effect
- Subject: Re: Hiss Effect
- From: Stephen Blinkhorn <email@hidden>
- Date: Wed, 18 May 2011 07:51:08 -0600
On 17 May 2011, at 17:23, email@hidden wrote:
That seems pretty useful, I need to emulate the sound of a vinyl
disc, would that white noise and pop/scratch effects be enough or
would I need more advance procedures?
the pitch of a vinyl disc will also wobble up/down a little (or a lot
for an off-center disc). try some pitch mod at the appropriate speed
(33/45) to improve the overall effect.
Stephen
Quoting Artemiy Pavlov <email@hidden>:
> I don't know how sophisticated you want this hiss/noise to be, but
> here is a quick one:
>
> - to create white noise, simply generate a random float value from
-1
> to 1. This can be done like this:
>
> NoiseValue = 2.0f * random()/RAND_MAX - 1.0f;
>
> - to have pop/scratch noises, define a period in samples in which
> these will occur, then on each period you generate a random number
in
> the range of 0 and 1, if it's less than 0.5 you do nothing, if it's
> more than 0.5 you generate a random value like above. I.e. each
> period has this occurring:
>
> NoiseProbability = random()/RAND_MAX;
> if(NoiseProbability>0.5){
> NoiseValue = 2.0f * random()/RAND_MAX - 1.0f;
> } else {
> NoiseValue = 0.0;
> }
>
> You can go more advanced from here and generate bursts of noise etc.
>
> On 16 May 2011, at 19:00, email@hidden wrote:
>
>> Hello,
>>
>> I need some sort of plugin library to add hiss and scratch to any
>> given audio signal, do you guys know anything I could use? I don't
>> need anything fancy but it has to be generated as a plugin, I can't
>> use some pre-recorded hiss/scratch sound and loop it since I won't
>> know the length of the given signal. This is supposed to work in
the
>> iPad.
>>
>> I appreciate any suggestion.
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