Gain aGain

So here’s a degree of confirmation about the OT’s electrical specs being circa 5.5V peak to peak on the Inputs

I set up the A4 (which should be reasonably calibrated) to output a CV signal of 5.5V peak to peak

Done as follows

CVA
Value Linear
Min -2.75V
Max 2.75V
Set to 64 (Mid point on Main page (not settings page) so defaulting/centrepoint to 0V)
Then apply a Sin/Saw Lfo at audio rates targeting ValueA with Depth 64 (exactly) (higher will distort shape)

Fed that into the OT with Mixer Gain set at 0 (after trying lower voltage min/max extremes first to be safe)

So it’s just about as per the electrical specifications … the signal is nearing FS for the quoted electrical specs +8dBu (5.5V p-p)

Obviously, just to repeat, there’s no attenuation on this as discussed above and dismissing theories in earlier threads and the inputs were also very Red - but there is no distortion

I can see why the new OT would be a handy tool in the modular world, but at these input levels the MKi OT is definitely not lacking … after the inputs, they both need the same careful gain management that we can document experiences of below

Here’s the screens showing the signals discussed

5.5V(+8dBu) input with Mixer Gain 0 for MKi OT (Metering solid Red) …

IMG_20171120_105953454

IMG_20171120_105923664

3 Likes