electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Articles  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links  |  Store
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » Instruments and Equipment » WREN
ADSR Envelope retrig problem? And some requests
Post new topic   Reply to topic
Page 1 of 1 [2 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
SoulState



Joined: Dec 16, 2018
Posts: 1
Location: Moscow

PostPosted: Sun Dec 16, 2018 10:39 pm    Post subject:  ADSR Envelope retrig problem? And some requests
Subject description: Is this a bug?
Reply with quote  Mark this post and the followings unread

ADRS envelope dont't restart on gate trig input check the attached patch
In the patch filter cutoff rising with attack stage, but don't restart from beginning (closed filter) on new gate trig signal of same note.

And some suggestions:
Drive modulation input on HrastSvf, distortion on 12 db Svf and others.
I'ts needed for poly synth control, to control all voices with one knob.

More than four voices on multi midi module, and ROUND ROBIN trig mode on them. Or better to have multi midi module, with regulable amount of steps like in sequencer (amount of steps=polyphony) from 1 to 16.

CPU usage on this simple 4-voice synth is crazy. 49% on my i7 4930k with 96khz samplerate.
Is it real to make some optimisation for polyphonic work?


4-note poly-a.wren
 Description:

Download
 Filename:  4-note poly-a.wren
 Filesize:  89.1 KB
 Downloaded:  224 Time(s)

Back to top
View user's profile Send private message
Blue Hell
Site Admin


Joined: Apr 03, 2004
Posts: 23010
Location: The Netherlands, Enschede
Audio files: 243
G2 patch files: 319

PostPosted: Tue Dec 18, 2018 6:11 am    Post subject: Re: ADSR Envelope retrig problem? And some requests
Subject description: Is this a bug?
Reply with quote  Mark this post and the followings unread

SoulState wrote:
ADRS envelope dont't restart on gate trig input check the attached patch
In the patch filter cutoff rising with attack stage, but don't restart from beginning (closed filter) on new gate trig signal of same note.


The problem seems to be in the mult MIDI thingie, as I don't really see anything odd on the ADSR when I trigger it from an LFO (but I may misunderstand things). Are there note-offs for the repeated notes?

Quote:
And some suggestions:
Drive modulation input on HrastSvf, distortion on 12 db Svf and others.
I'ts needed for poly synth control, to control all voices with one knob.


Looking at your patch I can see why that would be handy, will keep it in mind for a future update .. more modulation on everything. The Hrast filter is a CPU expensive filter to use BTW.

Quote:
More than four voices on multi midi module, and ROUND ROBIN trig mode on them. Or better to have multi midi module, with regulable amount of steps like in sequencer (amount of steps=polyphony) from 1 to 16.


This would be possible, but when keeping the next issue in mind .. there are limits to the polyphony possible.

Quote:
CPU usage on this simple 4-voice synth is crazy. 49% on my i7 4930k with 96khz samplerate.
Is it real to make some optimisation for polyphonic work?


The current calculation model is that for each sample the whole patch is recalculated module by module and after each calculation the new output value(s) are being propagated. This is being done because patches with complicated feedback will work better this way.

A usual optimization is to not do it like this but to calculate each module a couple of times in a loop and then propagate a set of calculated values. I will not implement this however, as I want the feedback stuff to work good in the self playing patches I make with it.

Another possible optimization would be to implement the algorithms in assembly code, this would be a lot of work, and it is not going to happen.

Over the years I've been trough the code several times, and do not see any straightforward optimization I could apply.

You could set the sample rate lower or could set the control rate decimation higher.

_________________
Jan
also .. could someone please turn down the thermostat a bit.
Posted Image, might have been reduced in size. Click Image to view fullscreen.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic
Page 1 of 1 [2 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » Instruments and Equipment » WREN
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
e-m mkii

Please support our site. If you click through and buy from
our affiliate partners, we earn a small commission.


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use