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lucky

I don't fully understand the logic behind the Bias slider of several brain functions.

I use a simple 8th Rock style and have the snare bias in the center, getting a snare note on the 2nd and 4th beat. When I move the bias up to 80% percent to the left I get a snare on only the 2nd beat. But when I go beyond that, e.g. up to 100%, I get no snare at all?!

r,Lucky

Ralph [RZ] · Site Admin Joined: 02 Jan 2008 Posts: 13332

BIAS limits the area that the brain can place notes in. If the brain does not want to place snares before beat 2 and you set the BIAS to 0 then no snare will play. BIAS 0 essentially says 'I don't want any'.

BIAS does not change the placement of notes, it only sets limits for it.
_________________
Ralph Zeuner
Rayzoon Technologies LLC
http://www.rayzoon.com

lucky · Posted: Wed Oct 10, 2007 7:20 am Post subject:

I guess I was a bit cryptic in my previous post, I was puzzled by the behaviour from 80% upwards.

dinoman · Posted: Thu Oct 11, 2007 6:27 am Post subject:

dinoman · Posted: Fri Oct 12, 2007 6:01 pm Post subject:

Could we have a full explanation of what "BIAS" means and how the BIAS sliders can be used (or point me to it in the manual if it is there).

Thanks,

Geoff

Ralph [RZ] · Site Admin Joined: 02 Jan 2008 Posts: 13332

BIAS sets tick (time) limits for the element that it is operating on. If BIAS is 50%, all ticks of the bar can be used. As it slides toward 0%, the upper ticks are being closed off. Likewise, sliding towards 100% closes the early ticks. It's called BIAS because it makes the element be biased toward either the beginning or the end of the bar.
_________________
Ralph Zeuner
Rayzoon Technologies LLC
http://www.rayzoon.com

lucky · Posted: Tue Oct 16, 2007 11:06 am Post subject:

Maybe I have been a bit cryptic previously; just to make sure that the bias slider behaviour has been noted. I just tested this in 2.0.19-RC8.

When you move the bias slider up to 80% the result is as expected, e.g. either more notes to the front or to the back of the beat. But when you go beyond that, e.g. from 80% to 100%, you will get no notes at all. That seems a bit odd to me.

Ralph [RZ] · Site Admin Joined: 02 Jan 2008 Posts: 13332

It's not odd. Imagine the bias slider being split into 16 pieces reflecting the 16 notes of a 4/4 bar. A backbeat snare element will not create notes before beat 2, which is at 16th note #5 of the bar and corresponds to a BIAS setting of 30%. Therefore, moving the BIAS slider below 30% will cause a snare backbeat element to not generate any notes.
It all depends on the specific logic of the element being biased.
_________________
Ralph Zeuner
Rayzoon Technologies LLC
http://www.rayzoon.com

lucky · Posted: Tue Oct 16, 2007 11:23 am Post subject:

Ah. I now fully understand it. It is like a sort of internal timer in respect to the middle of the bar. I was more thinking along the lines of a chance value in respect to the middle of the bar; -100% would mean all the notes will be before the middle of the bar and vice versa.