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Author Topic: Control a Sony Discman via remote port  (Read 3024 times)
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Rodrigo Constanzo is a performer and composer living in Manchester, England. He is an avid improviser and performs regularly using home made electro acoustic, and modified electronic instruments. He is currently working towards a PhD in Composition at th
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So I have a modified Sony D-2 discman. (I modified it so that when you pause the CD player, you still hear audio (like a stuck/skipping CD)).
http://www.nicolascollins.com/texts/cdhacking.pdf

There is a remote port on the CD player that appears to be a regular 1/8" stereo jack.

In that PDF linked above, on page 3 you see a 'remote' setup, that breaks out 5 switches from the remote port.

I want to be able to skip to next/previous track, forward/rewind, and pause/play from arduino control.

I've tried googling the D-2 remote to no avail. That would make it really easy to control as I can just use the buttons on the remote itself.

I've also tried googling the manual and/or service manual for the D-2 and the most that got me was a page where you have to pay a bunch of money to access the file for 24 hours.....

Is there some other way to figure out what kind of protocol the remote port is using?

I also thought about controlling the onboard Discman buttons, but that only gives me control over previous/next/pause/play, not forward/rewind (which are very useful while glitching/stuck/paused).
You can control that with onboard buttons, but have to go into a menu option, which is harder to manage.
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Ah, my first cd player was a similar discman.  I also ordered the remote kit from Service Merchandise back then (which included the RM-DM1K sensor and a remote but any sony cd player remote worked).  I might still have that in my shed somewhere, but should be out there on ebay or something.  I'll look for it and let you know if I can find it.
-e
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Yeah let me know! I tried ebay and everything and nothing came up. Knowing the name of the remote itself would be great! (or if it's of no use, I'd love to buy it from you).
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I haven't found it yet, but have another couple of boxes to check.  I do recall having another sony cd player (5 disc changer) at the same time and both remotes worked for both.  There is a ton of info on this forum and elsewhere about sony remote protocol that should help if you can rig up something to work with the 1/8" jack.

http://www.partstore.com/Model/Sony/Sony/RMDM1K.aspx   shows receiver out of stock but available as special order.  Remote model was RM-DM1 and RM-DM5 would work too.  As should a "universal" remote set to sony protocol.

http://cgi.ebay.com/Sony-D-555-remote-control-and-sensor-/190547681519?pt=LH_DefaultDomain_0&hash=item2c5d86e0ef  an active ebay auction with remote and sensor

http://dmst.aueb.gr/dds/news/84.html   lists how remote sensor to be wired (shield == ground, ring == 5v, tip == data)  as well as some protocol that has been decoded

These were from a brief web search, I hope that helps.

Good Luck
-e
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http://cgi.ebay.com/SONY-RM-DM1-REMOTE-/120742147235?pt=LH_DefaultDomain_0&hash=item1c1ccaf4a3

Here is another active auction with remote only.

-e
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That hadn't even occurred to me, that it was a universal protocol.

Wired would definitely be easier to deal with as it would be battery free, and wireless free, but it definitely opens up some possibilities!
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Can you link to any examples of the glitch music you make?
-e
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Here are two tracks I did many years ago in a similar sound world, but not made in such a controlled fashion (this is before I learned how to freeze/glitch on command).

So this basically a scratched up CD stuck in an old, untrustworthy CD player, with me slapping it every now and again. It took many many takes to get useful stuff.

http://rodrigoconstanzo.bandcamp.com/track/bach-prelude-in-f-minor-12-ii

http://rodrigoconstanzo.bandcamp.com/track/bach-prelude-in-f-minor-12-i


Both are improvisation with the idea being that I took a bach prelude (the same one in both tracks) and reinterpreted it along to itself glitching.

This isn't the CD skipping, but it's similarly glitchy (though more stuttttttery):


I did a gig last night which relied heavily on CD skipping/glitch (and drums) but I've not imported it to the computer yet.

And more of my music in general is here:
www.rodrigoconstanzo.com


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cool stuff!!  let me know how the remote stuff works for you.

Peace
-e
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I'll post stuff once I figure something out. You definitely got me on the right track though as I was imagining being a different kind of setup altogether (a specific remote JUST for this one player).
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Some remotes just used a series of potential dividers in a chain to indicate a button press. If it has three connections (like a stereo jack) then try putting 5 1K resistors in series between the positive and ground lines and connect the other line at the various resistor junctions like a variable resistor to simulate pressing the button.
You will have to work out what lines are power and ground from the jack socket but you should be able to trace that with a continuity meter and voltage meter on your unit.
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