Per the FAQ,
12) What line-in level is optimal? According to messages, such as this one, level setting 8: http://taperssection.com/index.php?topic=68518.msg947298#msg947298
But, I've also seen others, like guysonic and SunWizard, suggest it is not 8.
I wrote to Roland today and got a response. I actually think the answer doesn't really address the issue, but maybe someone can interpret it.
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Question: I'm trying to determine what gain setting to use (0-30) on the R-09 if I want my mic preamp (line-in) to handle the attenuation/amplification fully rather than the R-09. I've heard some say 8 and others say 17. I sure would appreciate the experts telling me which is actually is. Thanks!
Answer from Roland Support:
0dBu is the default input level setting on the R-09--this is also number 13 for the input level. You can use this as a template to set your volume levels.
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So, does that mean 13 is unity gain?