SM 2.7.1 problem with Unison voices with filters and Best performance (strange noises)

[Oberheim 8000]

I use Reaper 64b and SM2.7.1 64b and if I set main Unison for 8x, Filter 1 Analog > Best and Preset > Best, Max voices 64 and hit notes, It produce clicks and noises on start of notes, like as my machine is hard working but CPU usage is only max 20% - maybe 30%. Sometimes it can be heard without unison voices. On Dual filter are strange noises loud. On digital filter it is too, and allways (from draft to best).

[mabian]

It could be it's maxing out a single core.

Even though CPU usage seems low, a single core could be in overload, producing artifacts like the one you're describing?

Anyway I guess it's not normal behaviour...

I hope 2.7 nails at least some of the bugs that were really annoying in 2.6.
If not, it's still a king in chains...

- Mario

[Oberheim 8000]

Hmm you are right, I look into CPU in Task Manager and there if noises appear, the one core is maxed. Reaper dont show usage propertly and I had 40 sometimes 60% with 4 - 6 notes. But noises sometimes appear in lower CPU usage, If I use Best in preset settings and Basic Analog Filter without maxed any cpu core.

[kv331]

Why are you using unison? Try to increase Osc Voices parameter if you are using basic/wavetable oscillators.

With best quality and unison the CPU usage will be really really high!

The idea behind Osc voice stacking/unison (voices > 1) is that you duplicate the oscillators but the number of (analog) filters you use don't increase and hence the CPU usage becomes more tolerable!

[Oberheim 8000]

Why are you using unison? Try to increase Osc Voices parameter if you are using basic/wavetable oscillators.

Because sometimes it needs to have more osc then 8x in osc. For example I want 16 or 24. And for that case I need to use Unison. And if synth have it, why not use it?

[kv331]

For 16, use 2 oscillators with each voices set to 8. For 24/32, turn on layer 2