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vsariola / sointu

Fork of 4klang that can target 386, amd64 and WebAssembly. Tools run on Windows, Mac & Linux
MIT License
249 stars 17 forks source link

highpassfilter to delay #18

Closed esaruoho closed 3 years ago

esaruoho commented 3 years ago

would be good to have a highpass filter on delay

vsariola commented 3 years ago

You mean low pass filter, right? To make high pitch sounds decay away faster than low pitch sounds? It already has this low-pass filter: it is the damp parameter. 0 = no filtering, 128 = nothing gets through even in the first echo.

If you actually meant high pass filter, what's the audio use case?

It's possible to hack one together from the current units: make a full wet delay with no feedback, highpass filter it, send it to a receive unit earlier, add to the dry signal & feedback to the delay.

WIth these thoughts, do you still think we need one?

esaruoho commented 3 years ago

@vsariola usecase for HP is, as always, get rid of low frequencies like <130hz which muddy up the sound.

vsariola commented 3 years ago

What's wrong with adding a high pass filter just before the delay / reverb? The general idea in Sointu is that units are limited in their functionality, and it's more like a modular synthesizer where you build the patch just the way you like it. This is also to keep the code size down: the small units are highly reusable and can be implemented with only a few bytes of assembly.

esaruoho commented 3 years ago

understood, closing