EXS 24 Logic Sampler Users Group

At 09:12 PM 12/24/02 -0500, you wrote:

>To keep things simple, and to show that the problem is not poor sample
>editing, I've included a sample instrument with one of the 909 bass drums
>included with the EXS24. I think the culprit is actually the resonance
>control. As soon as it gets up to around 70% and starts to self-oscillate,
>the clicking starts. Anyway once again, I really appreciate your help with
>this and look forward to hearing what you come up with.

Yeah, I see what you mean. The click is at the end of the sound (I know you 
know, but when someone complains of clicks, pops, spins, and explosions, 
they could be at the beginning, out of a loop, in a loop, or caused by the 
loop).

24-bit AIFF, and there's no non-zero's at the end. I even silenced the end 
manually, and still got the click. I was listening through the Sound 
Manager, not ASIO (that's all I have at the moment).

I'd agree this is probably a "defect" with the EXS, so to say. It could be 
the contribution of the filters, or it just could be the sound generation. 
It could be the sound card/drivers, though, but I doubt it. Perhaps ASIO 
reacts different, probably not.

The tricky thing here is that sampler designers have to make tradeoffs. 
Let's say the designer was at your place, heard the issue firsthand, and 
went into the code and modified the way the sampler released sound - then 
other releases would suck, maybe. We aren't just talking drums - we are 
talking strings, guitars, etc. What if a tight release is wanted, and the 
sampler gently rolls off the ends of data?

Although it should be said that attacks are more mission-critical, and that 
practically all the time what is wanted is a roll-off of the end of 
wavedata. I actually know that this was done back in Logic 4.7, and I think 
most samplers, hardware and software, are programmed to rolloff when it is 
releasing a voice due to EOF. So I've heard. But this is hard stuff, 
especially when frequencies, high gain, and dynamics are involved.

But then again, in your case, there is no clicking unless the resonance 
tops 70%, as you say. I bet Clemens may want to see this example.

So... this is usually a case where good all-around programming chops come 
in, and you grab the envelopes and nail it yourself.

Maybe this is too long of a response, but hey - it's fun to talk about.

Back to Rudolph (I paused it right before Herbie says "I want to be a 
dentist...").

Garth Hjelte
Sampler User