Latency Problem (in V3.6.3) Options

[Anatolyj]

Hi, there is a problem - by default, grm plugins not transmit to DAW their delay (latency) info.
i.e. DAW cannot automatically compensate latency which produce plugins.
It`s starts work only if we disabled and enabled again specific plugin in rack.

Here i record short video wich good demonstrate this problem (for example two identical tracks, one track with GRM Equalize, you will hear the difference): https://youtu.be/LEqGHPW1rsI

VST 64bit Complete II v3.6.3, Windows, DAW Studio one 2.


(And BTW - delay 87ms for EQ, it's not a bug ? i.e. its should be ?)

This post has been edited by Anatolyj: Dec 5 2015, 07:40 PM

[Anatolyj]

And what I wanted to say about latency of whole GRM bundle.

Plugins with zero latency (no delay):

Band Pass 0ms
CombFilter 0ms
Delays 0ms
Doppler 0ms
Freeze 0ms
PitchAccum 0ms
Reson 0ms
Shuffling 0ms
SpaceGrain 0ms
Spaces 0ms

Its very good.

Next plugins which produce signal delay:

Contrast 40.6ms
Equalize 87.1ms
FreqShift 17.4ms (default bands 512), and 180ms with 4096 bands
FreqWarp 40.6ms (default bands 1024), and 180ms with 4096 bands
Fusion 40.6ms
Grinder 5.8ms (default bands 128), and 180ms with 4096 bands
SpaceFilter 87.1ms

And offcourse Evolution are king here, 365.7ms (default bands 8192), and almost 3 second (!) delay with bands 65536

I can understand about all plugins signal delay (especially Evolution), but come on guys, normal graphic equalizer with 87ms latency, need something to do with that. It's fantastic agitation system, really love it, and very sad that it's almost not a usable in realtime.
Please, It may be possible to optimize this?

In vst world are there tons of powerful EQ-s which have at least 0.1ms delay.

Also can assume, that if can optimize EQ latency (that certainly can be done), then in general, it should be possible to optimize whole GRM tools FFT engine (just in the sense of latency), i.e. delay for the other grm plug-ins. That would be really cool.

This post has been edited by Anatolyj: Dec 5 2015, 11:04 PM

[grmtools]

Hi Anatolyj,

GRM Tools plugins in Spectral Transform and Evolution bundles are based on Fourier Transform.
The frequency resolution is directly linked to the size of the block of samples.
In Evolution with 65536 frequency bands, you need 131072 samples to start the process, which is almost 3 seconds at 44.1 kHz.

Equalize is also based on FFT. It allows to have very sharp filtering, or even to completely cut some bands.
But the drawback is the latency.

You are right, there are tons of EQ, each with pros and cons.
You can choose the one that best fits your needs.

Best Regards

Emmanuel

GRM Tools Support