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Forums > C64 Composing > Ring Modulation in Sid Duzz It 2.0 beta
2007-12-01 19:53
odo
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Registered: Oct 2004
Posts: 27
Ring Modulation in Sid Duzz It 2.0 beta

I like ringmodulation a lot but i don't know how to do that in SDI.I read the manual but don't understand it.

2007-12-01 23:41
SIDWAVE
Account closed

Registered: Apr 2002
Posts: 2238
Waveform bits, value construction (for $d404, $d40b, $d412):

%00000000
^- gate bit (+$01)
^- sync bit (+$02)
^- ring modulation bit (+$04)
^- test bit (+$08)
^- triangle waveform (+$10)
^- sawtooth waveform (+$20)
^- Pulse waveform (+$40)
^- Noise waveform (+$80)

so, ringmod sound must use waveform $+4
14
24 not possible
44
84

$15,$14 = ringmod triangle wave with previous channel, similiar to
sync bit. If set to channel 2:
channel 1 frequency and channel 2 frequency will affect
the result, not the wave.


a normal pulse is $41, so just make it $44
2007-12-02 00:04
SIDWAVE
Account closed

Registered: Apr 2002
Posts: 2238
I have uploaded the complete SID Guide here:
SID Guide

Use this well and you can make any sound (at least you know what you are doing!)
2007-12-02 13:12
Linus

Registered: Jun 2004
Posts: 640
Quote:
a normal pulse is $41, so just make it $44


Ehrm, ringmod with pulse? Now that I'd like to hear ;)
2007-12-04 15:30
odo
Account closed

Registered: Oct 2004
Posts: 27
Sorry for the delay and thanks!!
Gonna try it today
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