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Modwheel 'timbre switch' not working.

Posted: Sun Sep 12, 2010 2:19 am
by tpantano
Basically, I have two timbres. I want it so that when the modwheel is up, one timbre plays, when its down, the other.

The way I did this is by setting the 1st patch to start at 100 volume, and 2nd patch to start at 0. Then, when the modwheel goes up I have timbre 1 set to turn its level off, and timbre 2s level to go higher.

Timbre 1 goes silent fine, but timbre 2's volume doesn't turn on... any ideas?

Posted: Sun Sep 12, 2010 9:27 am
by X-Trade
I can't quite figure out why, but its always been the case that the timbre level or the individual oscillator levels don't modulate from zero. it has to be set to one or something else.

Posted: Sun Sep 12, 2010 2:11 pm
by tpantano
X-Trade wrote:I can't quite figure out why, but its always been the case that the timbre level or the individual oscillator levels don't modulate from zero. it has to be set to one or something else.
When I set it to 1, it still doesn't work.... only from 9+ do I hear sound, and 20+ a decent level of sound... its annoying, because the second timbre bleeds into the first

Posted: Sun Sep 12, 2010 3:02 pm
by X-Trade
In my experience it works better with bi-directional controls such as the pitch bend. I know that is sprung, but then you can set both timbres to a level or 64 and give each one full modulation in opposite polarities. Not ideal I know, but I suppose it is a fairly uncommon implementation. You could try routing modulation to the individual oscillator mixer levels or lowering/raising filter cutoff too.

Posted: Sun Sep 12, 2010 3:55 pm
by pillbug
Do you have any Drive level on the timbres? If so, you could have the mod wheel modulate the Drive amount in addition to the (volume) Level...?

Posted: Mon Sep 13, 2010 12:06 am
by pillbug
Don't know if this will work with your particular sound but can the R3 modulate the EG2 (Amplitude) Attack and Sustain like the RADIAS can? I just tried this and it works pretty well. Timbre1 EG2 Attack is 000 and Sustain is 126 (of 127) while the Mod Wheel modulates Attack to +62 (of 63) and Sustain to -62 (of 63). Set Timbre2 Attack to 126 (of 127) and Sustain to 000 while the Mod Wheel modulates Attack to -62 (of 63) and Sustain to +62 (of 63).
Again this may not fit the sounds you are working with but maybe it's a starting point?

Software Bug

Posted: Mon Sep 13, 2010 11:05 am
by TecRoc
Hello,

now this seems to me, is a software bug issue.
The user is allowed to set modwheel as source and amplevel as
destination, to control amp level in both directions, just as tpantano
has figured out very logically. But it doesn´t work, what a shame! :shock:
Like x-trade, i also think its that the amplevel parameter is not biderectional.
I´m working on a solution, but this is a tough one i´d say.


Greets,
angry R3-User :evil:

Posted: Mon Sep 13, 2010 11:36 am
by X-Trade
Not at all, I think it is bidirectional.

But I think the modulation of the amp level is not actually modulating the amp level.
It is more like:
Sig > X Amp Level > X Mod+1 > Out
Rather than:
Sign X Amp Level (+ Mod) > Out

I don't know about the ranges or scales - I have my suspicions that the level control is not perfectly scaled for a natural response. It however does not appear to be linear. Perhaps it is square or cubic.

But imagine the above example:
the signal is set to the level, and then the modulation source merely doubles or cuts the volume. It isn't a problem with not being bidirectional, it HAS to be bidirectional because ideally you need to set level control to 64 and set the modulation to a bidirectional +/-64 - either from an LFO or the pitch bend, or any other bidirectional control.

In other words, full modulation results in a doubling of signal level, and full negative modulation results in a zero of the signal level.
As you know, 1*2 = 2, so with the modwheel on full you get a level of 2, not 127. 0*2 = 0, so the modwheel has no effect.
I'm sure of it now!

That may be overwhelming for some of you, but hopefully someone with a bit of mathematical & synthesis background can come and back me up.

Posted: Mon Sep 13, 2010 7:01 pm
by tpantano
well the way I've got what I want to do to work is by setting both of timbre 2s oscillators to 1, and then increasing their level with the modwheel.

It's annoying I can't modulate the overall amp level, but w/e.

Posted: Mon Sep 13, 2010 10:11 pm
by axxim
Hi,

I have made X-Fade patches before. Even my RPC#004 uses this feature. I can't tell exactly now, but I remember dealing with it too until I found the way to get it: Mod up= one timbre, mod down= the other. As far as I recall I have put the amp or volume to 64 and then set the mod wheel sensitivity(?) for T1-amp full to the right and for T2-amp full to the left. I switched each timbre to off to confirm that they fade in and out adecuatedly. When I get back home, I can tell you exactly how I set it.