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Discussion about the Korg PolySix synthesizer

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oscillator "bleed"

oscillator "bleed"

2018-03-30 by Malte Rogacki

Hi everyone;

I've observed another strange phenomenom.

There seems to be some bleed directly from the oscillators into the audio
output.

The setup is as follows: Set Polysix to Unison and 4" octave, then play one
of the notes in the highest octave and release it.
The last played note continues to sound very faint. In lower octaves this
seems to get lost in a more general noise.

Interestingly this bleed is not affected by the volume control at all. It's
also not affected by the attenuator or the Cutoff control; hence it
definitely comes directly from the oscillators. It's even there when the
output is turned off (from the front panel).
It's getting a bit quieter when setting the waveform to PW and setting PW
to 10. So my guess is that the bleed comes from both Sawtooth and PW.
The bleed definitely "travels" over the audio line - if I remove any of the
audio connectors inside the POlysix it stops immediately.

So far I've found this with two separate voice boards and two separate
processor boards (both original and clone).

Can anyone confirm or deny a similar problem? Any ideas what might be
causing this?

Malte

Re: oscillator "bleed"

2018-04-01 by backshall1@bellsouth.net

I replied to this about 4 hours ago from my email account and it never showed up, so I'm trying again directly on the Yahoo group site. All I said was

"I’m not hearing it, but then the high frequency response of my ears is not what it used to be. With the output switch at “OFF”, the output is grounded, so how can it possibly get any signal? Bad ground and bleed from the headphone output? But then it would be affected by Cutoff, etc. Do the Effects affect it in any way?
Don B."
 

Re: oscillator "bleed"

2018-04-05 by josh.nursing@gmail.com

I am seeing some inconsistent behaviour of the board as well. Writing from the Yahoo Group site itself.