Hi Jack On 01/01/2015, at 4:08 AM, Jack Jackson wrote: > you select VCO2 only and set range to 'normal' and 16' then play the > lowest possible note on the keyboard. What frequency is the > oscillator? 32 Hz > If you then set the range switch to 'low freq' what frequency is the > oscillator now? Too low for my Rigol to accurately measure, but about 4 Hz Adam