Hi a friend of mine, wants to use CDJ100s cd players with a big radio broadcast console (24 channels, plasma meters, symetric with VCA etc etc etc). Is it posible to start a CDJ100s with a standard faderstart control "punch" of 12 V. Or does he need to build a birdge PCB to convert standard 12 V start pulse to a Pioneer DJM600 pulse (Code write out from an IC?????) Also is it posible to use other functions then via a normal Studer 25 pin adapter?

Once I plugged a cable in between my CDJ500II players to enable 'relay' play. When I plugged it into the one player that was cued up it would suddenly start playing! So it could be that if you just short-circuit the two poles on the plug, you can start the player. Dunno if this is official though, but it's very easy to test.

Make - that's a feature (if you RTFM) designed for "Relay Play". It plays from one deck, then the other, then back to the first... repeat 'till there's no more tracks on the CDs!

Chris

Pulse, I have read the FM , I probably should have made more clear that the one player was playing (and continued to play), while the cued-up one suddenly started. So the playing deck did not send out any signal for the other deck to start, and still the other deck started. So I though it could be that while plugging in the plug I accidently short circuited the two poles, causing the other player to start.

AAaahhhh.... that would explain it! I gotcha. Could be the situation... I haven't played with it any more than having the decks indivudually linked to the mixer, or linked to each-other.

I'm not sure if a "short circuit" is the best thing for the decks' control circuitry, but I'm sure there's someone who's jerry-rigged it before!

Chris

One thing i'll do is put the singal on a scope, and see what i looks like.

put a signal generator on it, and try to imitate the signal and then try to see if a function is triggerd. I'll start off at very low voltages 2.2mV and work up untill it does something :-)...

If it works i'll design a small PCB to convert faderstart to Pioneer control in and post it somewhere. If its just a signal converter it will be simple. If i need to make a deviating singal or a digital word it will be rather complex

It would be very nice if the professional cd-player market would make 1 single type of connector for controlling functions external. such as the RS422 on Betacam and DVCPRO

[This message has been edited by DJ-Vastari (edited 01-26-2001).]

I tend to agree with Vastari and Make. The fader start must work on a very simple electronic "pulse". The reason I think so is whenever I turn off my DJM500 (which probably sends a small spike down the relay cables) if I still have my CD players on, it will trigger the fader start.

Maybe you could just try plugging the relay cable into a portable CD player headphone jack and seeing if that will send a fader start signal.

It's worth a shot. Let us know how you make out.

Vastari - I checked it out with my analog multimeter, and it does two things: For a "start" signal, it sends a pulse of +0.7V, when it sends a "stop" signal, it's the opposite - a pulse of -0.7V.

Simple interchangeable technology!

Chris

-0.7 and +0.7. Thats about the same amount (1V) as wich comes out their mixers 25 pin ports. I'll then probally will just have to adjust the 1v to 0.7v internally on the mixers remote control (studer- type) 25 pin sub D. Since this STUDER type connector dates back to the late 60's 1 volt on a pin gives a function. Pretty advanced for 1967, giving a technician the control over a reel to reel deck with his mixing console!!. The 12V fader punch could control a relai switch wich triggers the 0.7 from the desks START button. (it has START, STOP, FFWD and RWND aswell as DUB, REC,PAUSE and EJECT on 4 of the 24 fader modules, that mixer costed almost a $100.000 new in 1978!!)

The new Rane club mixer has CD starts for it's cross-fader. They give a full description of how the signal works.

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DJ PULSE> I can't control it in other forums, but in my forum, there's no posting competitions' website addresses. Sorry guys, thems tha rulez. <DJ PULSE

[This message has been edited by DJ Pulse (edited 02-02-2001).]