osc to double mode , lowest pict = digitalnoise

[gentleclockdivider]

Select an osc ,sdetpitch to lowest value ,set to double mode .
Now play the lowest notes on your keyboard = you hear some verry high notes ,
What s up with that

[bmrzycki]

If you play the lowest note with an OSC C0 (or C-2 depending on the vendor, note value 0x0) then Zebra plays just fine. It's when you lower the tuning greater than 2 octaves below that (-24.00). This is well outside the midi note range and is likely a compromise in creating a low CPU anti-aliasing oscillator. The same weird things happen if you play note 2 octaves above the highest MIDI note. Like the lowest note, the highest note (0x7F) plays just fine in a spectral analyzer.

I'm sure it's expected and nothing to worry about.

[Urs]

Zebra uses wavetables (graintables, to be precise), and when you go very deep (below 20Hz I think), there'll be interpolation noise. It sounds like a chirp and can't be avoided easily.