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Updates: Many topics are permanent, so may be updated to any material, for add or correct info.
Get more info: Since the beginning this site tryes to be a compilation center of the best sources for the JD800. Not a copy.
So please, visit the sites at the Links section for lots of much more very good information.

quinta-feira, 14 de dezembro de 2017

Making the Gandalf, The White

Dave and Randel with the White and the Grey.
Making the Gandalf, The White

This beuatifull custom JD-800 became famous.
And I found some of the making photos posted by hamsterdunce at Flickr.

Here the album description:

"Jeff Toman of Customsynth.co.uk artistically created beautiful new all-white look for my Roland JD-800, in the style of a classic '80s SH-101 synth. The logo was altered to match the style. It's a perfect way to go, since the faders are identical to the ones used on the SH. This set follows my work this afternoon at my friend Randel's synth barn in Essex, CT, as we add the custom parts onto an otherwise stock synth."



The complete album is at Flickr album: JD-800 Custom White Synth.




Here, just some photos to tease:







Observe some personal texts at button's titles.






Enjoy!!!

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segunda-feira, 5 de junho de 2017

Wailing Guitar Keyboard Solo


This was posted by the nice people at Synthopia.


Another video showing some wailing guitar solo on the Roland JD-800.

The videos was performed by Leonardo (Space4Keys).



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domingo, 21 de maio de 2017

Live Editing a Modified JD-800

Image: Suono & Computer


Another example of the modified JD-800 turned into a module showing live editing while playing.

That give a nice idea about some possibilites.


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terça-feira, 9 de maio de 2017

Replacement of Green Contact Strip and Keys on the Roland JD-800


Replacement of green contact strip and keys on the Roland JD-800

A full video with all the procedures to disassembly the keybed and replace the contact strip.



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Roland JD800 - Red Glue - Key Weights Removal

Roland JD800 - Red Glue - Key Weights Removal


Tom Szakaly from the Noddys Puncture presents a short video he made of the removal of the weights from JD800 keys.
Basically it involves dissolving the red glue with Caustic Soda solution.
Please be careful though - if you do try this yourself, make sure to use goggles and gloves...!

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quarta-feira, 11 de maio de 2016

JD-800 and JD-990 DAC Calibration

This is my JD-800. The DAC board is at left.

JD-800 and JD-990 DAC Calibration

Calibration for the JDs Digital to Analog Converters (DAC).

Just to remember, the DAC is that circuit where the digital signal is converted to analog. This is a very important part of the JD, because the quality of the result it does.

From Analog.com:
In principle, you give a digital input to a DAC and it provides an accurate output voltage. In reality, the accuracy of the output voltage is subject to gain and offset errors from the DAC and other components in the signal chain. The system designer must compensate for these errors in order to get an accurate output voltage. This can be implemented with external components and post-manufacture trimming. Digital calibration modifies the input sent to the DAC such that the gain and offset errors are taken into account thus removing the need for external components and trimming.


Thanks to Don Solaris, a JD-Master for posting this at his site. Click the links to be redirected.









If you already does not have the JD Service Manual get it here: JD Manuals.


Note: Please, if the links does not work, notify me at comments to update it. 


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quarta-feira, 15 de abril de 2015

Using the JD-800 as a Programmer for the JD-990



What a shame! I found I already had posted something so here.
Please people, I'm really short on time, ask me to see where I saw more material like this.


The JD-800 can control most of JD-990 parameters. 

This comes from the Sweetwater.com Using the JD-800 as a Programmer for the JD-990


The JD-800 sliders can be set to send MIDI messages that can be recorded into
your sequencer.
When adjusting a selected parameter such as cutoff, resonance, panning, etc., the JD-800 transmits a series of system exclusive messages.

Use the following procedure to enable the Transmit Edit function:

On the JD-800:
  1. Press MIDI.
  2. Use the CURSOR UP/DOWN buttons to select “TX Edit Data.”
  3. Press the INC (increment) button to turn this parameter ON.

On the JD-990:
  1. Press SYSTEM SETUP so it is lit.
  2. CURSOR to “RX Exclusive” and use the VALUE dial to select ON-2.
  3. Press SYSTEM SETUP to return to the previous screen.

NOTE: You will need to enable this transmit function each time you turn the JD-800 on.

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Zenta: A Informática Esotérica

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