@2disbetter, and @bert
I’ve a question about digital whine coming from the SSP when connecting to the Octatrack.
( i would have put this on the ‘optimised case’ thread, but its been closed)
basically, i find at around -70db im getting a constant digital whine.
its not a big issue, as i can noise gate it, and this only causes issues with slow long reverb tails.
anyway, i was re-organizing my rack, a Pittsburgh EP360, so i thought id ‘test’ to see what the issue was with this noise.
what ive noticed was…
I only get the noise if I open up cv/audio audio connects on the input jacks,
i.e. if I just use the SSP internal sounds , and have no jacks connected to the inputs (or if they are not connected in the SSP patch) - its completely silent.
but connect an input jack to the patch - and the noise becomes evident.
so i removed every module other than the SSP and one other module (so i could connect to input jack to test ‘issue’ , and it was still present - regardless of which other module i chose to test with. (filter, rings, mixer … didn’t matter what it was)
(yes, im using original SSP power connector)
its not a ‘power issue’, as the EP360, has a ridiculous amount of power on 12v and 5v rails, and as I said, noise was present even with case basically empty.
similarly, I’ve had this case for over 2 years, and never had noise with it before.
its also not related to the Octatrack , even plugging headphones into the SSP directly, i can hear the digital whine.
given my tests, i guess I’m ‘stuffed’ its some oddity between SSP and EP360 which i have to live with/workaround at least for now - unless anyone has any suggestions?
I’m not too concerned, rather just looking for suggestions and a way to move forward.
so my questions are :
a) are there any cases with zero noise?
I ask, as I also tried on another ‘dev rack’, I have, and the same noise was present there too.
so i don’t want to go on a wild goose chase, hunting a case down
b) can you recommend a case/power solution, that guaranteed do work?
whilst it’d be a pain to move the SSP out of the EP-360, since i want it to be the heart of my rack - I can see some advantage of putting it in a small 3u case.
the primary one being - when im developing patches on the SSP, i can move it close to me, so it’d be more comfortable…
EDIT: more tests - and some good news
first some ‘bad’ news, I just noticed the SSP is introducing noise into my EP360.
even if it’s not patched in, Im getting some digital whine from the output module.
( I guess this is not entirely surprising - i just hadn’t noticed it, as my previous test took the output directly from SSP - to avoid confusion)
but some 'good news’
if I put my SSP in my small dev rack (and disconnect other modules),
if I connect the SSP back to to my main case (EP360) there is zero noise.
this means that, I guess, putting the SSP in any separate case with its own power supply would result in no noise… so that is one possible option.
( any suggestions on small cheap case that might work, something like a pod?)
however, I do think it would be better if i could find a bus board(filtered?) that would solve the issue… since then the ‘console case’ could also have other modules in it.