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I've been reading about the "Railsback curve". Is there a way to implement this on a DX7? For those not familiar, this refers to deviations to the mathematically pure 2:1 ratio for octaves that are

I had a similar problem with mine. The memory would get corrupted when switched off, even with a fresh battery. In the end I found the fault was ZD1 (a 6.2V Zener diode) on the power supply board.

There are several elements to the battery that need to be correct. Obviously the battery itself must be good and properly connected, then there is the germanium diode which you can test with most

Hi David, I'm not a DX7 owner (TX802 here), but here are some general comments: * The battery is 3.1-3.3 volts.? If you are reading 4.6V, and you are certain that you are reading only the

re cap your power supply , or check voltages at main and follow first

Good morning, all.? I need your help.? My DX7 is one of those from Japan with the lamp cord power cord.? Recently, I've received this display and figured the battery was bad, so I changed it out,

Maybe because it's a testttone, only a sinewave? If you look at it in a wave editor you will see a type of irregularity that you will not see with a tremolo effect. -- MT

That's interesting, I wouldn't describe that as a chorus at all, to my ears that's actually tremelo.

This is a different instrument. I can't find Service manual or schematics for DX27S. Daniel Forró

Ah, don't bother. It's fine.

I was wondering myself, but I hadn't used the DX21 for a while, so didn't give it another thought. Just wondered why you wanted that sound - for good measure I threw in the other sound Well, turns

Hi Florian, Seems something is wrong with your INIT VOICE? The standard INIT VOICE should be only one operator without modulation. Don't know if it's like that on your DX27S, but it was like that

And here is the recording. INIT Voice without chorus and with chorus as well as just one operator without and with chorus. Hope it helps. Best, Florian

Thank you! MT

I overlooked your question about the hardware, sorry. DX21 uses a Panasonic MN 3209 as a chorus (256 stages), the DX27s? a MN 3204 (512 stages). I had done a quick comparison in the past, I

Might these be the schematics you need?.... : http://www.synthzone.com/midi/yamaha/dx27/ Gus

I could compare schematics if only DX27S Service manual or schematics is available. Unfortunately it isn’t. Daniel Forró

If noone comes through faster, I can record a DX21 in ~8 hours.

Hi, The DX21 and DX27s have a very basic Stereo Chorus effect with only one parameter: On/Off. I am looking for someone owning one of these keyboards, who can record a simple single note testtone -

That?s? why? I hope for a 1HU MODX rack since Yammi came ut w/ the keyboard versions. Unfortunately, these keyboard actions aren?t the holy grail too. Am 15.06.2021 um 22:25 schrieb Martin