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#1 2006-08-29 07:19:17

Slorrin
PROPHET64 GURU
Registered: 2006-07-09
Posts: 871

Filter instruments trigger problem

Okay, i found out why some notes won't trigger.

ONLY filtered notes have this problem

nsturments with a filter can't have a note triggered right after a previous note without a tic of break.

at least, on my p64.

is there a way around this?

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#2 2006-08-29 07:33:15

MikeTorino
Guest

Re: Filter instruments trigger problem

No, it can't be. Seriously, think about it, do you really think they would have released a program where two filtered notes cannot trig without having to insert a break? If so, the manual would have mentioned it.
I have had lots of adjacent notes playing in my Prophet64 sequencer without a problem, with or without the filter.

 

#3 2006-08-29 09:41:58

Slorrin
PROPHET64 GURU
Registered: 2006-07-09
Posts: 871

Re: Filter instruments trigger problem

well, not me
it can be, and is.

further investigation finds the bug is most active when the ADSR values show a medium to high decay.

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#4 2006-08-29 09:47:31

Jaicen
Centipede
Registered: 2006-07-14
Posts: 461

Re: Filter instruments trigger problem

It's a bug in the architecture of the SID. I know you use 6581's, which are known to be worse with this kind of thing. It happens when you have too fast an attack when using the decay parameter. If you use decay, set the attack to at least 1, that will normally solve your hiccups problem.

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#5 2006-08-29 09:49:26

MikeTorino
Guest

Re: Filter instruments trigger problem

Could you be a little more specific and describe your problem so that i can try it out myself?
If I get it right, you have two adjacent notes playing and the second one does not trig if the filter is active.
I seriously doubt it's a bug. It works swell for me.
If the ADSR is involved it sounds like your SID is the problem. The trig-problem is quite common when using decays, that's what hard restarts are for.
Anyway, give me an example I can try out on my own p64 sequencer and I'll do it this evening.

 

#6 2006-08-29 11:52:21

linde
Mad Max
From: Schweden
Registered: 2006-07-30
Posts: 95
Website

Re: Filter instruments trigger problem

I was always in the belief that Prophet 64 restarted the SID by itself once every few ticks or between notes so that the hiccup wouldn't occur. Then again I haven't played around much with the sequencer.

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#7 2006-08-29 13:09:37

MikeTorino
Guest

Re: Filter instruments trigger problem

The manuals say the optimal time for pre-hard restart is 33 ms. It's a little difficult to restart it here and there because of timing issues and because it would interrupt the sound. It only restarts before a new notes triggers. For example, wave table sounds cant be hard restarted on every row since the time in between them is less than 33 ms.

 

#8 2006-08-29 18:42:01

Slorrin
PROPHET64 GURU
Registered: 2006-07-09
Posts: 871

Re: Filter instruments trigger problem

yeah... its not the sid,  because it happens on both sid 1 and sid 2, and there's no way both of them are busted in precisely the same way.

I have tried every type of restart..  i will upload an unstrument AND a sequence after i move on sept 1, then you guys can test it.

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