e-licktronic Forum

Two problems I'm struggling with:

1. Background hums and noises - I'm having noticeable
hums and noises on some instruments, not all,
it is created mainly by BD, SD, LT/LC, MT/MC, HT/HC - hums
and CP -noise
especially MT/MC hum is loud
other instruments have acceptable hum/noise,
each of above instrument makes hum in its own tune
on its individual output and summary of them on master output,

it is obvious that analogue machines do make hums and noises
but I think these are to big

to illustrate this problem I recorded below track,
on the beginning I keep individual levels down and then I turn them up
one by one in order BD, SD, LT/LC, MT/MC, HT/HC, CP
then back down,
for illustration purpose I increased master volume on my mixer to max
(sequencer is in STOP mode)



Is it matter of low quality components?
what has to be changed to fix it?
or maybe there is some other issue?
MT/MC makes hum really audible

2. Background Pattern
I'm not sure if that's created by sequencer
or by individual instruments,
it happen on other machines/sequencers/midi
but on my Yocto it is too audible,
I'm talking about "signal" trigged on every (16) step on pattern
which I can hear in background,
I can normally edit notes on pattern without problem,
this just sits in the background all time

again not all instruments involved in this problem
mainly CB, MT/MC, LT/LC, SD, BD
and again most noticeable on MT/MC !!

below sample recording
it is EMPTY pattern - no notes edited on it,
as previously on the beginning I keep levels down
and then I turn them up
one by one in order CB, MT/MC, LT/LC, SD, BD
- then back down,
volume on my mixer on max
(sequencer in PLAY mode)



I have no idea how to fix it
even where to search for solution?
(sequencer? master? instruments?)

I finally got a chance to check your audio samples - didn't work on my phone - and those 'hums' you refer too seem to be the oscillators for the toms that are constantly sending out signal. The big noise that comes up when you turn up the clap is probably the signal from the noise generator.I'm guessing that, because these signals are always present, they interact with the pattern timer, even when the pattern is empty.

With my limited electronics knowledge I'd say a good place to start looking is the VCA sections for these instruments, it seems they don't respond to triggers the way they should.

thanks ElSchtroumpf for your suggestions
because of lack of my electronics knowledge
Im going to ask somebody alse to fix it,
also I dont have assciloscope which looks like is crucial

tonight Im going to check Yocto as expander only
trigged by external sequencer (mc505)
that should tell me how much Yocto sequencer is involved
in those problems

btw Im looking for somebody in London area who has experience
with Yocto project