How people preparing wav files before loadind them in V-synt

27 Oct 2008, 14:47

I found it very difficult to get right sound from user PCM files.

First problem is loop. How can I find right loop in my sample? You could try and try and always get clicks at the end of loop.

V-synth does not have anything to find loop, it just can find "zero" point.

So, before you upload a sample in your V-synth you have to find proper loop in another sound program, which can do it, for example, Awave Studio.

At second, I often have dull clicks at the end of notes in user PCM files.

What do you do with your PCM samples to avoid these issues?

Re: How people preparing wav files before loadind them in V-

27 Oct 2008, 15:05

I am not preparing them at all, if we're talking about one-shot samples or beat loops that are in general ready to use in a usual sampler.

The problem with seamlessly-looping sounds on the V is in the way it handles them when VariPhrase is on. By technology, V splits the sound into frames (i.e. short portions, like 256 or 512 bits etc.), then analyzes each frame's spectrum. When a sample is played, it recreates each frame by it's spectrum. Thus, if the loop doesn't end on the end of the frame exactly, you will get a click. It's normal. If you switch VariPhrase off, the V will work as a conventional sampler, with no clicks on seamlessly-looping audio.

What I do in case I want to make a looping sound is simply use the time parameters. I'd set time to 0, then route an LFO to modulate time just a bit.

Re: How people preparing wav files before loadind them in V-

27 Oct 2008, 18:38

Thank you, Artemiy.

Nonetheless I think that use time "zero" function for those samples the same as use just one transmission in your car.

I did not mean drums at all - I meant voice, flutes, saxes - solo instruments and attack of sample is very important. If you use time freezing you will lose attack and get unnatural effect.

Here it is my example of V-synth looped solo instruments:

Re: How people preparing wav files before loadind them in V-

28 Oct 2008, 11:10

You should also add a falling envelope for time, so the samples plays a bit, and then freezes in a loop that can also be modulated.

Re: How people preparing wav files before loadind them in V-

28 Oct 2008, 13:50

Anyway, if you found quite a good sample's loop it helps very match to avoid clicks even Variphrase splits sample into frames. Although, but not always, I have just 30-40% successful results with good loops after encoding.

"Thus, if the loop doesn't end on the end of the frame exactly, you will get a click."

The question is - how to cut sample exactly at the end of a frame or something like that.

For example, famous patch "Oriental Vox" definitely has been looped.

Artemiy, could you give us starting point for "time" and "time env depth" to tweak sample?