[LAD] Phase rotation

[Robin Gareus]

To follow up, there is

https://github.com/x42/phaserotate.lv2#readme

Binaries of the plugins are available from
https://x42-plugins.com/x42/x42-phaserotate
The commandline tool is currently only available when building from source.

On 8/31/21 3:09 PM, Fons Adriaensen wrote:
> On Tue, Aug 31, 2021 at 04:24:43AM +0200, Robin Gareus wrote:
>  
>>> Now don't believe that phase shifting a signal will always result
>>> in a waveform with a lower peak/RMS ratio. It could very well
>>> have the opposite effect.
>>
>> Well, there is a minimum. So far I just brute force detect it, trying
>> all angles in 1 deg steps on a file.
> 
> Brute force indeed...

Works sufficiently well and fast, I have a few ideas how to integrate it
into the plugins, but it is tricky since it requires context.

> In other words, this really kills whatever snappy transient response
> you may have had.
I did some listening tests, both on individual samples as well as using
the plugin on the master-bus with various performances. In many cases it
is audibly transparent.

But yes, it can kill quality, just like [multiband] compressors,
limiters, or any tool, really.

On the upside I now have better understanding of segmented convolution,
hilbert filter and related FFT topics, which is what this exercise was
about.

Cheers!
robin

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