Improve the sound of your Casio CZ

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madtheory
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Improve the sound of your Casio CZ

Post by madtheory » Mon Jun 29, 2009 11:17 pm

So I finally got around to trying the calibrations in the service manual for the CZ-1. The DAC offset voltage was the biggest change. I actually did it by ear, I played a random 8 note chord, and adjusted the VR for minimal noise. My CZ is a LOT cleaner sounding now. No hiss when you release the notes, and no crappy noises when you play chords. It's like I remember my CZ-5000 used to sound.

On the CZ-1 you have to remove the keyboard to get at the DAC section, which is a little awkward.

I've had a CZ-101 and CZ-1000 that had the same issue, so check it out- it might be worth doing on yours.

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Re: Improve the sound of your Casio CZ

Post by Juno6 » Tue Jun 30, 2009 7:51 am

Nice tip...

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Re: Improve the sound of your Casio CZ

Post by AstroDan » Tue Jun 30, 2009 6:47 pm

Wow, didn't think you'd have to calibrate a digital synth. Can most digital synths be calibrated?

My DW-8000 has a certain wheeze on some notes...but I don't know if that's inherent and untreatable.
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Re: Improve the sound of your Casio CZ

Post by michael stein » Tue Jun 30, 2009 7:20 pm

madtheory wrote:and no crappy noises when you play chords.
I know this sound. Thanks for the tip didn't know you could fix this.

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Re: Improve the sound of your Casio CZ

Post by madtheory » Tue Jun 30, 2009 11:00 pm

AstroDan wrote:Wow, didn't think you'd have to calibrate a digital synth. Can most digital synths be calibrated?

My DW-8000 has a certain wheeze on some notes...but I don't know if that's inherent and untreatable.
Even a digital synth has analogue bits! Furthermore, offset voltage seems to be an issue with older DACs, as far as I can make out anyway. Modern ones are more stable.

Go look for the DW-8000 service manual and see what can be done. If it's on the high notes, then it's probably aliasing- that's normal. I found the Casio one on the CZ Yahoo group. These are always a good source for info.

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Re: Improve the sound of your Casio CZ

Post by solderguy » Wed Jul 01, 2009 12:28 am

Thanks for posting this !
Will make sure to do this calibration when I finally get a CZ ! ( hankering for a CZ for some time now )

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Re: Improve the sound of your Casio CZ

Post by Operatron » Thu Oct 29, 2009 1:44 pm

thank you :)

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madtheory
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Re: Improve the sound of your Casio CZ

Post by madtheory » Fri Oct 30, 2009 6:47 pm

You're welcome :)

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Re: Improve the sound of your Casio CZ

Post by Sexor » Fri Oct 30, 2009 10:33 pm

I wonder if the JD-800 has something similar. I had one for a while and it sounded like 8-bit s**t.
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Re: Improve the sound of your Casio CZ

Post by aeon » Sat Oct 31, 2009 1:58 am

Sexor wrote:I wonder if the JD-800 has something similar. I had one for a while and it sounded like 8-bit s**t.
Yes, it does. I think Don Solaris has documented the process of calibrating the DAC.


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Re: Improve the sound of your Casio CZ

Post by Mr Rich » Sat Oct 31, 2009 10:35 am

michael stein wrote:
madtheory wrote:and no crappy noises when you play chords.
I know this sound. Thanks for the tip didn't know you could fix this.
I know that sound too...
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Re: Improve the sound of your Casio CZ

Post by madtheory » Wed Mar 17, 2010 1:02 pm

FYI it is on page 59 of the service manual, which you can find here in the files section:

http://launch.groups.yahoo.com/group/CZsynth/

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Re: Improve the sound of your Casio CZ

Post by tekkentool » Wed Mar 17, 2010 11:00 pm

oh god i don't want to take off the keyboard of my cz-1, but the problems occurring sound exactly like the DAC's need calibration :(

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Re: Improve the sound of your Casio CZ

Post by tom Cadillac » Thu Mar 18, 2010 6:54 am

Do you know if the same stuff applies to the FZ1? I might be making a trip to the repair shop soon and might include the FZ1 on the 'to do' list? If I can hire a van that is! :D
"On the following day , the sorcery undespairingly continued: I changed my series, chose other sequences, cut other lengths, spliced different progressions, and hoped afresh for a miracle in sound." (Stockhausen)

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Re: Improve the sound of your Casio CZ

Post by madtheory » Thu Mar 18, 2010 2:11 pm

tom Cadillac wrote:Do you know if the same stuff applies to the FZ1?
I don't know, but you can check the service manual, it's on that yahoo group also I think.

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