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CHORUS Crackle

2013-12-10 by Gregory Thomas

I love my EX-800, however I notice when I have the Chorus on, and ONLY when I have the Chorus on (parameter 48 turned to 1), it ";crackles" when the cutoff (parameter 41) is above lets say 32 and is introducing additional harmonic content. This is not just the L+R output, but it comes out of the Phones. It's not the signal coming in hot, because I can have the Volume know at 1/8, and as long as the Chorus is on, that crackling is produced. The moment I turn it off, the crackling is not introduced into the audio, again, regardless of where the Volume is set. I have no problems with any static coming from my knobs, and quite honestly, I got this unit second from someone who bought this new in 1984 and used it seldom and it is in brand new condition (at least cosmetically.)

Is this a characteristic of the KLM-598 Chorus chip? Or rather, is it that my chip is just so old it needs to be replaced? Thoughts?

Thanks!

Greg

--
g r e g o r y t h o m a s

soundcloud.com/LamuWaves

youtube.com/LamuSounds

Re: [korgpolyex] CHORUS Crackle

2013-12-15 by Sami Jumppanen

Hi,

my first thought was about operating voltage being too low. If you can, verify the condition of the power supply. This was just a wild guess. The chip could be faulty as well.

Best regards,

Sami

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On Tue, Dec 10, 2013 at 2:52 AM, Gregory Thomas <gregory@...> wrote:

I love my EX-800, however I notice when I have the Chorus on, and ONLY when I have the Chorus on (parameter 48 turned to 1), it "crackles"; when the cutoff (parameter 41) is above lets say 32 and is introducing additional harmonic content. This is not just the L+R output, but it comes out of the Phones. It's not the signal coming in hot, because I can have the Volume know at 1/8, and as long as the Chorus is on, that crackling is produced. The moment I turn it off, the crackling is not introduced into the audio, again, regardless of where the Volume is set. I have no problems with any static coming from my knobs, and quite honestly, I got this unit second from someone who bought this new in 1984 and used it seldom and it is in brand new condition (at least cosmetically.)

Is this a characteristic of the KLM-598 Chorus chip? Or rather, is it that my chip is just so old it needs to be replaced? Thoughts?

Thanks!

Greg

--
g r e g o r y t h o m a s

soundcloud.com/LamuWaves
youtube.com/LamuSounds

--
Sami Jumppanen
http://netti.nic.fi/some-e

Re: [korgpolyex] CHORUS Crackle

2013-12-15 by Gregory Thomas

Thanks for responding.

The power supply seems to be in good condition. Again, cosmetically, no obvious signs of damage, wear. I'm guessing its the Chorus chip, but that's just a stab. But part of me wondered if it was just a quirk of the poly/ex800. Closed voicings, with the cutoff low and chorus on is when the crackling becomes prevalent. If I'm playing a pair of 5ths or other open voicings (no 2nds or 3rds) it doesn't really introduce the crackling.

Is the module encouraging me to have wider voicings? (I kid)

Thanks!

Sent from my iPhone

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On Dec 15, 2013, at 3:00 PM, Sami Jumppanen <sami.jumppanen@...> wrote:

> Hi,
> 
> my first thought was about operating voltage being too low. If you can, verify the condition of the power supply. This was just a wild guess. The chip could be faulty as well.
> 
> Best regards,
> Sami
> 
> 
> On Tue, Dec 10, 2013 at 2:52 AM, Gregory Thomas <gregory@...> wrote:
>>  
>> I love my EX-800, however I notice when I have the Chorus on, and ONLY when I have the Chorus on (parameter 48 turned to 1), it "crackles" when the cutoff (parameter 41) is above lets say 32 and is introducing additional harmonic content.  This is not just the L+R output, but it comes out of the Phones. It's not the signal coming in hot, because I can have the Volume know at 1/8, and as long as the Chorus is on, that crackling is produced. The moment I turn it off, the crackling is not introduced into the audio, again, regardless of where the Volume is set. I have no problems with any static coming from my knobs, and quite honestly, I got this unit second from someone who bought this new in 1984 and used it seldom and it is in brand new condition (at least cosmetically.)
>>  
>> Is this a characteristic of the KLM-598 Chorus chip? Or rather, is it that my chip is just so old it needs to be replaced? Thoughts?
>> 
>> Thanks!
>> 
>> Greg
>> 
>> 
>> -- 
>> g  r  e  g  o  r  y      t  h  o  m  a  s   
>> 
>> soundcloud.com/LamuWaves
>> youtube.com/LamuSounds
> 
> 
> 
> -- 
> Sami Jumppanen
> http://netti.nic.fi/some-e
>

Korg Poly800/EX800 Users

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