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Its possible although you have to find the spare replacement. If your key doesn't sound try first to clean inside the keyboard. If the problem persist it should me something about the rubber caps (they are usually sold as one-octave pieces) or the keyboard scanner.

Perhaps you mean SX-EX50? I have an SX-G6 (EX70) that is the upscaled version of the 50. So, if the EX50 has similar MIDI settings, you have to set on the organ MIDI ch. 1 for the Upper Manual and Ch. 2 for the Lower Manual. (read user manual about how to do it).Then tun on or off the MIDI features as you like (program change-control change)-I usually set to off any of these options, so when I change a sound on the organ, it osi not changed also on the expander. On the Solton (MS40 orX4?) you have to go into MIDI input channels and set Right on ch.1 - Left on ch.2 . In this way you'll have the right hand sounds of the Solton, on the Organ Upper manual (mixed with the organ sounds, that you can turn off as you like with the volume control) and the Solton rhythms and accompaniment on the whole lower manual. Hope this helps.

Sorry, I don' t understand your question

I doubt I'm willing to find these, I'm more up to high end models. Such PSR were really basic for the time. Anyway 7 and 27 if I correctly remember were part of same era of the 4500. As for the voices should sounds in same way (DASS synth.) probably the accompaniment style is not really on same league.

@@musk771 I get it, but i like both entry level keyboards & High end models.

@@timothyverbist5795 So I will pay more attention for you, if one will come out for reasonable bucks!

@@musk771 I get it.

I already got one. It is a rebranded Hohner PK-250. The value depends about conditions. These are very ancient keyboards, spare parts are not more available. Just collectors like I am, may want one. A fair value would be around 200-400 $

Thanks!!

Thanks, in my opinion not so well played, just on the fly test in bad posture. The cool factor is that punchy Technics drums, so unique, especially toms and snares, The PSR-4600 brillant accompaniments complement it very well, truly 80s feel.

@@musk771 ...still have my old Technics SX-K700 here. I guess I have to switch it on again after a long time ☺

@@qrdnk Do it. I have one too, closed somewhere.

Yes, all sounds from the KN3000

​@@musk771 i have a kn1000 technics were like the yamaha tyros range back then absolutely amazing

@@roycemurgatroyd7963 Right, fantastic instruments back in the days, still great and fun to play right now.

Unfortunately when something start going wrong, these are old, spare parts difficult to find or expensive to repair. Mine is now in pristine condition and sounds lovely. Hope it will last for years to come.

Thanks for watching! These are superb music-machines.

G70 and the whole G series , later the BK9 and 7 are still brillant instruments. G70 was very complete, I have no doubt it can comfortably stay near Genos, but unfortunatley I never had one. Probably I will get , actually I have a long list of desirable instruments.

Sometime you can find it on ebay, for cheap.

I have

These oldies keeping strong!

Yes , still in my collection

@@musk771 does the sequencer works good? and the quantize? because on 510 the timing is not good on it

@@orionconstellation2 Yes, no problem at all with quantize. Anyway the 5700 and 510 are vastly different. The 5700 is older but top of the line with many editing features. 510 in younger but middle-class keyboard and much more simple in features.

@@musk771 thanks , if you have time can you make demo how sequencer works? thanks

Agree. Thanks for watching.

I don't have this car anymore sorry. As I remember it was standard with the "professional navigation system". If your car isn't ordered with this accessory, it is not possible.

Thanks. I'm glad you appreciate these time machines.

Unfortunately not, this one has sampled (AWM) voices

@@musk771 thanks for the reply. Cheers 👍

@@yamagrow420 The PSS-580 and 780 was last flagship Portasound with FM voices. From 1990 PSS-590 and 790 introduced AWM for both voices and rhythm. FM anyway still were employed for more basic models.

@@musk771 thank you Musk 👍

Hi Steve, you can choose any of these, depends about your needs. They are quite easy to set up. I would suggest a Roland BK-7m that I also have and it is really great. maybe Ketron has some better sound but Roland is really easy to hook up to anything, there is a connection wizard that makes you trouble-free during the midi connection. Voices are very good and styles sounds great. The Korg modules are old nowadays, even if much better in terms of sounds that your ra-90. If you prefer Ketron sounds, also an old X4 is a great choice, you can find it for cheap money. Audya is big and heavy, if you don't need the audio styles (that sounds great but have some quirks too) you may choose the sd40 , sounds good, but it has some software bugs that has not been fixed yet. With a BK-7m you won't regret, however they are growing up in prices and not difficult to find units that cost more now than they were new. You can also wait for the new Ketron EVM presented at the last NAMM. Practically a little module controlled by a touchscreen. You can place the screen on your music rest and keep the module a bit distant, it has the same specs as the Event X. But expensive. About differences between SD40 and Lounge I believe the first one is a pure real time arranger and sound module, second one is a midifile/audio player probably with capability of assembling phrases,Isn't what you looking for.