tetsuo

Whenever I want to reduce the loop duration under 5ms, it sounds like if the loop duration was following a "staircase function", rather than sweeping naturally.

I thought it would be due to sample quality limitations, but even using 32bit float mode and high quality samples, it still sounds that way.

groove-shortest-loop-precision

Please show us the code for a small example

it sounds like if the loop duration was following a “staircase function”, rather than sweeping naturally.

I'm not 100% sure I know what you mean about sweeping---I'm guessing you are modulating the loop duration?

From doing a quick experiment, it appears as though the loop points are sample accurate (vs having precision based on signal vector size). Since the loop point inlets for 

 are set in milliseconds, I'm guessing that you are not changing the loop point with enough precision. For example: at a sampling rate of 44.1KHz, the difference between a loop point of 5ms and 4.9ms is about 4 samples. For larger loop lengths, you might not notice this, but you will at loop points of the size you are speaking of.

If you post an example patch showing how you are setting the loop points, I could give a better answer (perhaps it is not 

 but the way you are driving those inlets).

From doing a quick experiment, it appears as though the loop points are sample accurate (vs having precision based on signal vector size). Since the loop point inlets for groove~ are set in milliseconds, I'm guessing that you are not changing the loop point with enough precision. For example: at a sampling rate of 44.1KHz, the difference between a loop point of 5ms and 4.9ms is about 4 samples. For larger loop lengths, you might not notice this, but you will at loop points of the size you are speaking of.

If you post an example patch showing how you are setting the loop points, I could give a better answer (perhaps it is not groove~ but the way you are driving those inlets).


I don't need to show you any patch because I even have the same issue with [groove~] help file.

For example, if I drecrease loop duration, sound doesn't change between 0.9977 and 0.9751 and then doesn't change until 0.9522, etc.

I have the same problem even with 96000Hz file. I also tried to modulate with signal using [line~] but the problem remains

I don't need to show you any patch because I even have the same issue with [groove~] help file.
For example, if I drecrease loop duration, sound doesn't change between 0.9977 and 0.9751 and then doesn't change until 0.9522, etc.
I have the same problem even with 96000Hz file. I also tried to modulate with signal using [line~] but the problem remains


I tried something different, by modulating the loop duration directly in samples unit. Thing is, even loading a 96KHz file, if I try to create for instance a 10 samples loop, the duration sounds the same as when I load a 44.1KHz file.

It does not depend on the samplerate of the file, but on the samplerate set in dsp settings.

Well I just tried to change the DSP settings as well as my sound cards settings, and nothing changes :(

Actually I'm trying to make a sort of beat-repeater like iZotope Stutter Edit.

In Stutter Edit, some extremely short manipulation under 1ms are perfectly handled without any problem, even when I run it in 44.1KHz...

Actually I'm trying to make a sort of beat-repeater like iZotope Stutter Edit.
In Stutter Edit, some extremely short manipulation under 1ms are perfectly handled without any problem, even when I run it in 44.1KHz...


Often if we can get a patch we can suggest a workaround if we find a problem and we can see what you are trying to do.

As it is with your description so far, I'm not able to see what it is you are talking about. Maybe some steps and and indication of the type of sound file you are using? Does groove~ interp make any difference? Do you get the same problem with wave~ or play~?

I'm not trying to be difficult, it's just that we are actively working on things for the future of Max and I am very interested in the way people use groove~

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I didn't tried wave~ so far. play~ does not have loop function, does it?

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Try to modulate loop duration.
I didn't tried wave~ so far. play~ does not have loop function, does it?


Sorry it seems my code doesn't load from clipboad.

Sorry it seems my code doesn't load from clipboad.
Here is the patch


groove~ shortest loop precision