2009/4/7 Grammostola Rosea <rosea.grammostola@gmail.com>
Hi,

I want to record electric guitar chord progression. I've an:

- epiphone les paul
- little amp, orange 30r
- maudio dmp 3 preamp
- shure 58a beta
- mic stand


What do you prefer, preamp of mic in front of amp?

I would not use a preamp, unless it's a tube preamp or you don't have a mixing console
 

How do you manage the gain and eq?
- guitar
- amp
- preamp
- ardour

 Always ensure that the input signal is loud as possible. If you are going to use a scheme like: mic -> mixer-> sndcard -> ardour then use a lowpass/lowcut on the mixer (usually 75hz) and then compensate with your bass knob (low cut shelving is different from the bass knob one which is a bell). I would not use a low pass filter or a low cut until your sound results in a lot of "rumble", I would prefer EQ.

Compression + eq will help you to achieve loudness. Do not use hard compression or you are going to entirely lose dynamics.
Spectrum analyses are very useful (together with a couple of full functionally ears) in order to identify "annoyance" freqs.
Once your signal is compressed then you can boost characterizing freq for your les paul to achieve the sound you want.

I usually have a 3/4db maximum gain reduction with a slow attack (20-30ms) and release (~400ms) for guitar signal... but of course this is not a standard and is striclty related to your input level.
 

How do you  mix it?
I've read that it is useful to use an low-pass filter, some compression
and EQ.

As above.
 

What are good plugins on GNU/Linux for this?
What goes pre- and what postfader?

Try to do the best before... you can improve a good starting sound (pre ardour) with plugins, you can't do the opposite.

BTW
pre-fader: sc4 mono compressor -> Multiband EQ
post-fader: send_to_bus_with_gverb


Thanks in advance,

\r

regards
raffaele