Plaits glitches when number of poly channels increased

[dbgrande]

I'm noticing significant glitches and pops when I increase the number of poly channels going into the V/Oct input of Plaits. When I look at them more closely, I see NaNs, Infinities, and very huge voltages coming from some of the output channels.

To demonstrate this, connect ML Cloner (or equivalent) to the V/Oct input, and attach NYSTHI MultiVoltimetro to the output in Min/Max mode. Then sweep the number of channels from 1 to 16 and back several times.

I get somewhat different results depending on the settings of Plaits, and the audio settings of Rack. Also note that this meter will capture the huge voltages and the Infinities, but it doesn't capture the NaNs that are also coming out of Plaits.

I also get similar glitches on power on, when Plaits's V/Oct is set to polyphonic.

For reference, I'm running this on Linux, and I don't see these glitches with Xenakios's Macro PolyOscillator 2, or Atelier Palette.

[dbgrande]

For additional reference, I cannot duplicate these glitches when running on Windows, but it still happens with Linux.

With Fedora 33 it happens using the official Rack binary, or using my own compiled Rack binary. With Fedora 34 and pipewire the official Rack binary doesn't work, but it still happens using my own compiled Rack binary.

[cschol]

Confirmed in v1 8c7fd24724133a86c508ac6b56b7557ff503f1f8 on Ubuntu 20.04 w/Rack 1.1.6.

Also confirmed Atelier works as expected.