linuxaudio.org

You (Fons) obviously know your stuff when it comes to implementing

convolution, and I'm very grateful you gave us libzita-convolver, but I

have to disagree with this statement:
On Sat, 2012-10-20 at 12:00 +0000,  Fons Adriaensen wrote:

quoted text
> Thirdly, for the use case of reverbs, the whole latency issue is

> just irrelevant. A reverb IR should not contain the direct sound

> (since this will be mixed in separately), and in fact the first

> 10 ms or so should be silence anyway, they don't contribute to

> the effect and just cause coloration. Which means you can adopt

> a scheme that permits arbitrary block sizes by allowing one (Jack)

> period of latency. Just remove as many samples from the start of

> the IR to compensate.

When you use a reverb plugin for ambience or things like the Bricasty M7

Bass XXL impulse, the coloration it is 90% of the effect you are using

the plugin for.

There is a whole range of useful coloration to be had by changing the

pre-delay within 0-20ms. Often it will sound best with 0ms, because that

how the maker of the impulse listened to it.

An ambience impulse is an important part of practically every mix I do.
That is why I am so happy with libzita-convolver and it's offspring :)

That is also why I would *love* latency compensation on buses in Ardour.
All the best,

Bart.
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