Hi All,
Besides the above mentioned manufacturers' manuals, those from Erica Synths I like too; sometimes they can be a slightly bit short but on average good explaining manuals.
In the old days Doepfer wasn't too bad either, however for some of their new modules it isn't as good, in my opinion, as it was back in the old days.
Very clear manuals are those of Waldorf, pity though they decided to stop producing Eurorack modules, the very last modules are now on the market, soon it will be sold out, I am afraid.
Perhaps not everyone's cup of tea if it comes to manuals however those from Xaoc Devices I don't mind to read either.
Shakmat Modular manuals are quite all right too. Kind regards, Garfield.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads