Log inRegister an accountBrowse CSDbHelp & documentationFacts & StatisticsThe forumsAvailable RSS-feeds on CSDbSupport CSDb Commodore 64 Scene Database
You are not logged in 
CSDb User Forums


Forums > C64 Composing > SDI filters is all over the place
2016-03-31 17:13
Psylicium

Registered: Dec 2014
Posts: 8
SDI filters is all over the place

Ok, so I'm starting to get the hang of SDI. but I have encountered a peculiar issue with the filters... I want to have a filtered sound in channel 1 only. Let's say I have the following setup:

F=Filteded, NF=Not Filtered
CH1: F | CH2: NF | CH3: NF
Channel 1 plays F inst. - OK
Channel 2 plays NF inst. - OK
Channel 3 plays nothing

CH1: NF | CH2: F | CH3: NF
Channel 1 plays NF inst. - OK
Channel 2 plays F inst. - OK
Channel 3 plays nothing

CH1: NF | CH2: NF | CH3: F
Channel 1 plays NF inst. - OK
Channel 2 plays NF inst. - OK
Channel 3 plays F inst. - OK

I have tried playing with the "force single channel" settings, and it works as it should when the filtered instrument is playing in channel 3. Am I missing something, or is it only possible to have the filter playing correctly if the main filtered instrument is in channel 3?
2016-03-31 19:18
spider-j

Registered: Oct 2004
Posts: 166
Never worked with SDI, but could it be that bit7 of $d418 is setup wrong in your filter program?
2016-03-31 23:22
Psylicium

Registered: Dec 2014
Posts: 8
Oh... I seem to have located the problem. I forgot to initiate the filter table with a line that defines cutoff, band and resonance, like

01: 80 00 1F 42
02: <filter sweeps or whatever starts here>

Instead, I just entered the band/resonance value directly to the instrument in the sound editor - and that seems to affect other instruments as well. But anywho, all channels play as they should now - and I obviously still have things to learn :)
RefreshSubscribe to this thread:

You need to be logged in to post in the forum.

Search the forum:
Search   for   in  
All times are CET.
Search CSDb
Advanced
Users Online
Didi/Laxity
dano/padua
hedning/G★P
Acidchild/Padua
Krill/Plush
Andy/AEG Soft
Isildur/Samar
Snabel
Guests online: 31
Top Demos
1 Uncensored  (9.7)
2 Edge of Disgrace  (9.7)
3 Coma Light 13  (9.6)
4 The Shores of Reflec..  (9.6)
5 Comaland 100%  (9.6)
6 We Come in Peace  (9.6)
7 Lunatico  (9.6)
8 Incoherent Nightmare  (9.5)
9 Wonderland XII  (9.5)
10 Wonderland XIII  (9.5)
Top onefile Demos
1 Dawnfall V1.1  (9.5)
2 Synthesis  (9.5)
3 FMX Music Demo  (9.5)
4 Pandemoniac Part 2 o..  (9.5)
5 Daah, Those Acid Pil..  (9.5)
6 Treu Love [reu]  (9.5)
7 Merry Xmas 2017  (9.4)
8 Dawnfall  (9.4)
9 Gubbdata 2017 Invite  (9.3)
10 SidRok  (9.3)
Top Groups
1 Oxyron  (9.4)
2 Booze Design  (9.4)
3 Censor Design  (9.4)
4 Finnish Gold  (9.4)
5 Crest  (9.3)
Top Musicians
1 Rob Hubbard  (9.8)
2 LMan  (9.7)
3 Jeroen Tel  (9.7)
4 Linus  (9.6)
5 Drax  (9.5)

Home - Disclaimer
Copyright © No Name 2001-2018
Page generated in: 0.206 sec.