Wierd Oscillator Problem with Sylenth1

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-- Wierd Oscillator Problem with Sylenth1

Posted by Beatflux on Jun-03-2010 06:41:

Wierd Oscillator Problem with Sylenth1

I was looking at a pure saw in Sylenth1 through a spectrum analyzer, and the notes C3 and above have some part of the very high end cut off. Once you press B2 or anything lower you get those high end frequencies back.

I was comparing it to Twin 2, and Twin doesn't seem to do this.

Posted by Quantize on Jun-03-2010 09:39:

Is it something really obvious that you can hear? or do you just notice it in the analyser?

If it's the later I wouldn't worry to much about it. It might just be part of the character of the synth.

Posted by kitphillips on Jun-03-2010 13:11:

Might be an anti aliasing filter kicking in. Or you could be running into the top end of the sample rate.

Posted by Looney4Clooney on Jun-03-2010 13:42:

quote:
Originally posted by kitphillips
Might be an anti aliasing filter kicking in

most likely this

Posted by Beatflux on Jun-03-2010 16:59:

It's in the 15k-18k range, but I always thought it sounded a bit "dull."

Posted by adamtrance on Jun-04-2010 10:38:

its done on purpose to reduce cpu, so those frequencies are taken away

Posted by Beatflux on Jun-04-2010 20:59:

quote:
Originally posted by adamtrance
its done on purpose to reduce cpu, so those frequencies are taken away

Ooo, ok. Thx.

Posted by Looney4Clooney on Jun-04-2010 22:34:

quote:
Originally posted by adamtrance
its done on purpose to reduce cpu, so those frequencies are taken away

how so ? It would need to filter out those frequencies which would require cpu cycles. Seems the aliasing issue would be more the case ? Again not sure as I don't use it.

Posted by adamtrance on Jun-05-2010 08:10:

quote:
how so ? It would need to filter out those frequencies which would require cpu cycles. Seems the aliasing issue would be more the case ? Again not sure as I don't use it.

No its not filtering, it it were a filter you would see a falloff, and there is no, the harmonics just stop. So its being band limited, so it has to calculate less harmonics, or its using some other method that I dont know of. But lennard said himself its there to reduce cpu, Im just saying what he says

Posted by vikernes on Jun-05-2010 14:50:

quote:
Originally posted by adamtrance
No its not filtering, it it were a filter you would see a falloff, and there is no, the harmonics just stop. So its being band limited, so it has to calculate less harmonics, or its using some other method that I dont know of. But lennard said himself its there to reduce cpu, Im just saying what he says

I remember reading that. btw, if you up the sample rate it doesn't get cut off. So there, problem solved...