Batman sends Grayson on a quest so he can continue working on the BatSynth. Can anyone who can identify which synthesizer schematics he has pulled up on the BatComputer!?? Post in the comments!
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Looks almost like the Korg Monotron. The lower panel looks like a VCO circuit heading in to the "MIX/HPF". Good eyes to whoever figured this out!
FYI the comic is Batman and Robin #34 that was released Wednesday August 20th.
It’s from page 9 of the service manual for the Roland MKS-30 rackmount polyphonic synthesizer (ca. 1983-84.) The Batsection called up by Batman up on the Batscreen displays the voice mixer, which combines the audio signals from each of the 6 voice circuits via TL072 family op-amp. The resulting signal is fed through a high-pass filter (HPF), a simple RC circuit to bleed off high frequencies, user controllable via 100k potentiometer (“Brilliance” control.)
http://i59.photobucket.com/albums/g293/wunderhorn1/mks-30_BATMAN_zpsb280d7a8.png
Strangely, while the more common Roland JX-3P keyboard uses the same design, the service manual for that synth was apparently drawn by a difference tech and the schematic for the above circuit was drawn in an entirely different manner.