sample and hold bug in bazille

[gillianyeah]

Hi, i may have found a bug, or just misunderstood how the Alt CV is supposed to work.

The Alt CV only seem to work on one voice, in either poly or mono unison mode.

The attached preset file shows this, the filter cut off is changed with each key press,

The patch is in mono unison with the 2 voices spread left and right, the filter can be modulated by either the the random cv or the sample and hold which is triggered by the Alt CV

When using the random cv the filter modulates both voices, when using the sample and hold it only modulates one and the other one remains fixed.

If you put it into poly mode then the voice is modulated every other key press.

this does not seem right to me

[Urs]

I haven't got time to check it out right now, but using S&H triggered by the Alt modulator won't work. The S&H triggers when the trigger input crosses from negative to positive value. The Alt modulator never does that - as each voice is either positive or negative, it never changes polarity within a voice.

[gillianyeah]

My description probably isnt the best. But im basically finding two voices of the same patch behaving differently, which just seems a bit odd.

[Howard]

Bazille manual, page 25 (about Sample & Hold):
"Each time the Trigger signal passes through zero in the positive direction, a ‘sample’ is taken of the input signal..."
'Alt' flips between positive and negative values so it only triggers the S&H every second gate.
I just checked: it seems that the value of 'Stack' is irrelevant here, which I also find a little strange...

[david.beholder]

I'm not fully understanding problem, but:

The Alt CV only seem to work on one voice, in either poly or mono unison mode.
...
If you put it into poly mode then the voice is modulated every other key press.

And

'Alt' flips between positive and negative values so it only triggers the S&H every second gate.