Bitwig Grid — Cosine Window module

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j_dowe
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Bitwig Grid — Cosine Window module

Post by j_dowe » Tue May 28, 2019 12:02 pm

Image

I can hear what the Cosine Window module does (it seems to provide some smoothing after the Wavefolder), but I don't really understand why it works.

Any insights?

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The Space Disco
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Post by The Space Disco » Thu Jun 20, 2019 3:25 pm

Haven’t tried it yet. What does it says in the help menu?

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j_dowe
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Post by j_dowe » Thu Jun 20, 2019 3:51 pm

The Space Disco wrote:Haven’t tried it yet. What does it says in the help menu?
it's not very detailed. here it is:
Image

btw, the Formanatee preset uses it.

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pekbro
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Re: Bitwig Grid — Cosine Window module

Post by pekbro » Tue Jul 21, 2020 8:10 pm

A window function is just that, it returns a zero outside of some interval, in this case the interval formed by a cosine function on the source.
When you multiply a signal against it, that signal will return zero outside that interval, this leave only the area where they overlap.
E.g. the window. So, something like a gate, derived from the multiplication of 2 signals, rather than an explicitly defined gate very probably.

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Re: Bitwig Grid — Cosine Window module

Post by Arneb » Wed Jul 22, 2020 12:23 am

j_dowe wrote:
Tue May 28, 2019 12:02 pm
Image

I can hear what the Cosine Window module does (it seems to provide some smoothing after the Wavefolder), but I don't really understand why it works.

Any insights?
Looks like the concept of "window functions" in DSP. Now indeed the documentation screenshot you posted is pretty lousy; they should at least have told you whether they apply that cosine-shaped window function in the time domain or in the frequency domain. In the former case, I'd expect it to act as something like an ASR envelope; in the latter case, something like a band pass filter.

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