I have no experience with plugins or Cubase, so I can't give advice on that. Maybe the plugin has a bug?

Yes the attack is obviously one difference. I actually have about 5 different versions now of this patch. All slightly different, none are exact. Replacing the LPGATE exactly with filter envelope is impossible. The reason is that Kurweil envelopes can not be programmed with enough precision. Ideally it should be possible to adjust the attack envelope at 1 millisecond or finer resolution. The attack is very important of a sound, and a tiny change makes the sound very different. But my ultimate goal is not to make a 100% replica, but to make a good sound that I can use in my songs.

Great work anyway, I'm a synth programmer myself and it's quite laborious... cheers!

Yes of course ,you only need to follow my loading instruction if you have working .syx files. But some people make their own patches on the DX7, which is rare though. And I have found several .syx files on the internet that did not work unless I fixed them first.

Sorry I made this video too early. After this video, I found the correct samples and configurations to make the K2700 sound identical. I made a demo video about those corrected sounds. Did not have time to make another direct sound-by-sound comparison video (which would be boring as they now are identical).

Believe me, i and am sure others enjoying every second from your videos, sir i wish you to have the time for making more great videos like this , thank you 🤝

So true! I certainly won't let go of any of my old synths, ever.

I will!

Yes, I have plans to make a video about how to manage (or to get stressed about) the thousands of patches in this machine. The quick access is one way. I hope I find time to make that video.

Thanks! Love your meditative music, so I subscribed to your channel too!

@@GrimVoxTech You're very welcome, and thank you very much for subscribing to my channel too! I am glad you liked my meditative music. I appreciate you subscribing :) I am looking forward to enjoying more of your videos. Have a great day.

Thanks! Kurzweil does not reveal any way contact them directly, only through distributors: kurzweil.com/distributors/

Many thanks - bug reporting process?

The reverb was different between these machines - that might make you think one is "bigger". About warmness, I don't know. The patch conversion in this video was still work in progress, although I was wishing it was over. I found that K2700 actually has almost all the K2500 samples, but I had not found the correct ones yet in this video. Also, some algorithm parameters were still wrong here. In my later video (kzbin.info/www/bejne/b6fUf6NjiLR5fdE) I do a demo after almost all patches sound identical to the K2500.

Measurement are the engineering method to explain things. The human ear can be fooled in so many ways. The human hearing is very limited and imagination/superstition can affect the judgement. As people listen to KZbin with various devices, the measurement helps explaining subtle differences that would otherwise drown in the sound reproduction system. A device with low noise and distortion is more capable because you can always add noise and distortion to your liking, but never remove it.

True, but Korg never promised forward- or backward-compatibility, whereas Kurzweil have. I was pleasantly surprised to see how good most of the DX7 patches loaded up (in the other video) and very _unpleasantly_ surprised by how poorly the K2700 managed the K2500 files. Ironic and sad.

@@mrdavies7894 thats definitely unexpectedly bad. This is why I gave up on hardware synths - you upgrade to new generation and gotta do many hours of sound design and programming live sets again. Switched PC and now Mainstage. I still have my full legacy sound set and live sets every time I upgrade a keyboard or get more powerful computer to have latest piano sounds.

Thanks Giuseppe! Yes the Yamaha DX7 SysEx loads without errors, as long as it has the SysEx start and end bytes and contains only one SysEx message and no microtuning or other data. Kurzweil mentions compatibility with 6 operator FM patches. I think that means they only support the Yamaha DX7 SysEx. They just can not mention the competitor brand or model. The SysEx data contains bytes that specify brand and model of the synth, so it will only work on that specific device, unless another device is able to import that data by special built-in conversion. The FM engine in the K2700 has 6 operators. In theory one could make a conversion, manually or automatically by software, from 8 operator to 6 operators, and from any synth SysEx format to DX7. But some complex 8op sounds would be impossible to convert or they would sound different. Conversion from 4 operator (e.g. Yamaha DX27) to DX7 is possible using DXconvert or 4OPDX7 programs.

Overall I'm satisfied and would still not choose differently. There are some disappointments in usability and compatibility, but the sound quality is amazing.

Yes, I use Cakewalk Sonar Producer on an Windows XP computer. But I have not tried to use the K2700 USB as a MIDI port. I have a separate MIDI controller. You probably have to install to your computer the USB driver from Kurzweil's website for that to work.

@@GrimVoxTech Thank you for the reply! I appreciate that. I'll work at it. I've gotten it to work as an audio input device via the USB out from the K2700, but it won't recognize it as a midi instrument input. I may look towards a midi interface. Great channel!

Oh yes it can! Samples have no problems as they are very simple. My own samples from the K2500 were loaded into the K2700 just fine. I don't have a K2000 so I can not say for sure for that one, but I suspect it will work. Importing programs are more problematic because there are changes in the way panning, volume and other parameters work in the K2700, and Kurzweil did not put enough effort to make the import function free of bugs. But after importing, the programs can be corrected manually to work as they should. A lot of extra work, but on the positive side, less work than if you would have to do everything from scratch.

Oh yes, there are some differences. One can slightly tweak the FM parameters to make the sounds more identical.

Yes I am.

@@aholatom Thanks for the reply! I ended up going K2700 over the Fantom 8. Sounds like I'll need to use a DAW for sequencing to make it easier, but I'm excited for the new keys. Do you recommend any K2700 software from Kurzweil?

I remember replying to this question earlier - for some reason it has disappeared. Anyhow, the sound editor / librarian software from kurzweil.com is made by soundtower. It is buggy and seems not to have an user manual. By just browsing through sounds I messed up the patches in the K2700. Had to restore from a backup. I can not recommend it. I don't think there is anything else available. Some drivers maybe. I'm making my own software for the K2700.

@@GrimVoxTech Thank you for the reply. That is unfortunate.

Warmer and organic? These are not animals. What patches do you use to do this comparison? In this video of mine the patch conversion is totally screwed up; parameters are wrong and completely different(!) samples are used. In my later video I have fixed the problems. There the patches sound identical between K2500 and K2700, except the K2500 is less HiFi. If you like LoFi sound you can always add noise and distortion in the K2700 patches or put it through a fuzzbox. But in K2500 you can not get a cleaner sound that it gives you - so it is limited.

​@@GrimVoxTech I'm talking about the actual converters of each synth. It's not about adding distortion. By organic I mean warm and alive sounding....as opposed to sterile and computer-y. The video below is a great example of the sound differences between old and new generation Kurzweil instuments. The difference to me is night and day. The newer Kurz sounds like a VST in a keyboard....where as the K2661 sounds alive. kzbin.info/www/bejne/pKubnKmoec-Eac0

@@Abruzzo333 The DA converters? There is virtually no distortion in those as both have sigma-delta converters. The K2500 has crystal semi converters, which are often noisy if the board is not carefully designed. The K2700 converters are transparent and have no impact on the sound. These are digital synths! They are not alive or warm. A sound is said to be warm if it has even harmonics. The sinewave generator is improved in K2700 so it is truly sinewave. The K2500 has all kinds of harmonics in the sine gen - not warm! Filters and most other VAST algorithms are identical between K2500 and K2700 if you adjust the parameters correctly! The parameters have changed but they can be tweaked so they sound identical. That video seems to compare different patches and blames the engine for the differences. Quite a religious, or actually superstitious opinion that is totally incorrect.

@@GrimVoxTech Just listen to the side by side comparison in the video I sent you or search "kurzweil k2661 vs pc4". It's the first video that pops up by Sanctuary Phiosophy and Music. The sound between old and new gen Kurzweil is NIGHT and DAY!....Not superstition at all. You do know that different synths/keyboards use different digital to analog convertors to convert audio to what you hear don't you? They are vary greatly from one instrument to another. Some are good, some are cheap sterile and cold sounding. The sterile sound quality of all Kurzweil instruments after the K2600 has been discussed by many at length within online forums such as gearspace.... So yes WARM...ORGANIC. early Kurzweil K series are known for this. Doesn't matter that it's digital, they sound analog and not like other digital synths like DX7's, M1's etc..If you can't hear a difference between the two then you're not very discerning. Companies change, they cut corners. Some companies that once had a great name are not the same.

Yes it is unfortunate that I have some many unfinished projects that need the K2500 patches. Otherwise the K2700 has plenty to chose from for new projects. But if you check my later video I have now fixed the patches and now they sound identical between K2500 and K2700, except K2500 is slightly noisier.

I don't have a PC3, so I don't know. Kurzweil might promise compatibility but as can be seen here, you need to manually fix the patched after importing. This is mentioned in the user guide too. They have done a bad job implementing the conversion. But it all comes down to cost. They obviously can not afford to implement everything properly. You could buy about five K2700 for the price what one K2500 did cost back in the days.