The mixer is the "noisy" thing in the loop. I read -91.5dB without a mixer.
Also, the filters use
'vintage' 4558 op amps which are adding some as well.
Remember, 15dB is like a factor of 5 TIMES lower noise with the MOTM
system!!!! I'm kickin' serious ass!
Paul S.
> Has anyone else had results like this?
>
> banana jack modular synthesizer, circa 1994-1995
> Filter to vca to mixer, no signal input to filter, no other patches, all
> appropriate levels set to max. Used shielded banana to 1/4" cable to
> multiple, then to patchbay, as results for a 3' banana/banana to patch
panel
> were atrocious, about -40 dB, some obvious signal leakage was seen -
bursts
> of signal.
> -70.99 dB RMS (signal to noise ratio, unweighted)
>
> MOTM system, circa 2000-2001
> Filter to vca to mixer, no signal input to filter, no other patches, all
> appropriate levels set to max.
> -85.49 db RMS (signal to noise ratio, unweighted)
>
> Other limitations in my setup (cables, patchbay, mixer, 24 bit audio card)
> may have given the -85 dB limitation, but the comparisons are appropriate
as
> I used left and right channels simultaneously for the measurements.
>
> John Loffink
> microtonal@...
>
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>