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Per Laurent's instructions, today I started the River cold and immediately ran a new Learning routine. This time tuning took 80 minutes. The tuning was still bad. The voices themselves were out of tune with each other, and OSC1 and OSC2 were still out of tune with each other to varying degrees on each voice.

The next step tomorrow will be to do a fast tune at startup, then play while the instrument warms up.
If the tuning is still not good, I will then perform a test without Learning and go back to Autotune All.

I will report my results tomorrow.

I installed firmware 2.60 into my River yesterday. The tuning was worse than before. Before I go any further, I need to provide some background:

1. My River had been experiencing tuning issues prior to the update. It seemed to have trouble tuning itself properly after it had been unused for more than a week or two. I previously contacted Laurent who suggested I do a voltage test on the power supply. I had not yet done this when the issue seemed to resolve itself with more frequent usage. The tuning issues were not just between voices; there were issues with OSC1 and OSC2 being out of tune with each other, in degrees which varied from voice to voice, so no amount of fine tuning could get all the OSC1's and OSC2's in tune with each other. Again, this resolved itself somehow, so I never proceeded with any voltage testing.

2. I had been away for several weeks before installing the new firmware, and had neglected to check whether the previous tuning issues had returned during my absence. I had hoped the new firmware would take care of any issues.

So, having installed 2.60 and run the Learning routine, I got a message saying "Learning Success". The process took 82 minutes. Unfortunately the River was completely out of tune - both voice-to-voice and internally between OSC1 and OSC2. I ran a Fast Tune which did not help. I contacted Laurent again, and he gave me a set of instructions to follow to determine whether the problem is in the Learning routine or whether something else is wrong.

I will keep you all posted as I proceed. This process will take several days at least to complete.

I know a Profile Editor for Mac has already been discussed. How about an editor / librarian which can "genetically morph" between programs and randomly "mutate" them in a controlled manner, similar to the Soundtower editor / librarian software for Sequential synths?