On Wed, May 18, 2011 at 6:34 AM, Gregory Wieber <
email@hidden> wrote:
> I'd say you might also want to low-pass filter the white noise, so you have
> some 'pink noise' instead.
>
> On Tue, May 17, 2011 at 12:05 PM, Artemiy Pavlov <
email@hidden>
> wrote:
>>
>> 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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