What is best way to record a Doublebass in a home studio enviroment?
What type of mic?
What kind of processing? (compression? eq?)
I have a session coming up and have been reading a lot about this to. The strangest yet most practical and cheaper technique, is a sm57 with the body and cable wrapped in a washcloth tucked in the bridge aiming upwards. (the washcloth is so that you can fit the mic into the bridge)
My favourite way is with an Rode NT1A pointed at the player's left f hole just over 12"s away. If I am capturing it live on a stage I will use an Audio-Technica AT803b attached using the tieclip to the strings, just below the bridge. This also works for cello, viola and violin. With regards to processing, some gentle compression and a light touch of reverb is usually more than enough.
I'm a little late on this one, but I'll mention it anyway. I wasn't sure what kind of music you're playing, but I can comment about jazz more than classical. I've played with guys who loved these kinds of double bass pickups. There are dozens out there, usually between $100-300. As for EQ, I prefer subtle touches, just enough to compliment the bass's natural sound. I would mic the neck as well, but that's 'cause I really like hearing the slap of the strings.