Due to holiday preparations I did not found earlier the time and mood to listen closely to your organ recordings.
Like usual, one never gets disappointed listen to your music (regardless organ or piano).
Some overall things. First, I stored your recordings as you posted it a week before. Since you said that you put additional reverb now to the recordings I was curious and compared the first one (BWV690) with and without artificial reverb. With no doubt, the original recording has enough reverb. I am glad that I stored it, so I can listen to a really much better quality. No muddy sound, and it is already enough reverb, really. You play that clean and exact, that you do not need to put tons of additional reverb to make a pulp mass. Sorry to be that drastic, perhaps others have other opinions. But I am pretty sure, that the reverb in the church is already enough. Enough is enough!
The only thing, the original recording has much noise. Listen to the end of BWV690, that is very much noise, but no white noise, like something from digital processing . Maybe the Edirol shows some weaknesses for organ recordings?
To the different recordings (I now listen to the better ones, you know - the recordings without artificial reverb).
BWV690:
Very well played, I did not hear any mistakes. Maybe the right hand manual stands slightly too much out for my taste compared to the left hand and pedal (which I could not so well distinguish - maybe my headphones can't handle 16'' registers...)
BWV622:
Yes, you pointed me already to that great piece. It is normally played pretty slow, and you played it even a bit slower. Good so (beside the first notes, they are a bit to fast, but after that you remain in the groove). There were some wrong notes in the bass and left hand, according to your quality standard you can do better if you allow your more patience.
I told you already, that's the right piece for funerals, in my opinion. I said to my wife that I would be glad if it would be played on my funeral (no joke, serious meant).
One question: You played the pedal more or less non legato. Is it because you play mainly with toes instead alternating toes-heels (so technique wise induced) or do you think it should not be played legato in the pedal part?
I like the registration, however the remark to the not clearly disitinguished left hand remains.
BWV639:
Very good played too.
The left hand notes are in my score (Bärenreiter Urtext) tied together in groups of four. You phrase it in groups of two what gives the piece a total different character. Tied in groups of four, and played a bit faster, would please me probably even more. You put some additional trills, here and on BWV622 - so it seems you have a different score.
BWV643:
Surely not easy to play, the 16th notes in the pedal, but you managed it well! A bit bothering wrong note at the begin of the second part, and a couple of some slips, but overall it sounds good to me.
Overall a great avhievement, and you can manage it in that short amount of time. Congratulations!