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 Forum index » Discussion » Schmooze
What if post-sampled aliasing could be removed?
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audiodef



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PostPosted: Mon May 07, 2012 6:56 am    Post subject: What if post-sampled aliasing could be removed? Reply with quote  Mark this post and the followings unread

It has been said that aliasing cannot be removed from a signal. Given that aliasing does not occur in a well-made sampling system, what would be the practical application of removing aliasing if it could be done?
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Antimon



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PostPosted: Mon May 07, 2012 10:48 am    Post subject: Reply with quote  Mark this post and the followings unread

It would make it easier to implement a classical subtractive synth structure with sawtooths in ChucK, for one. Smile

The question is how expensive the post-sampled aliasing removal would be. If it were cheaper to just use pulse trains or (in the case of increasing the rate of a sample) filter out high frequencies before doing the up-sampling, then it wouldn't be an interesting thing to use.

How come? Do you have a magical algorithm up your sleeve? Wink

/Stefan

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audiodef



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PostPosted: Mon May 07, 2012 5:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

No, I was just reading an updated edition of one of my audio tech books. Naturally, when I came across a statement that X could not be done, I had to ask, well, what if it could be?

I also thought that even if it would be useless as a practical tool, it would be a nice creative one.

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