It took me a long time to get this very thing sorted out. I have devised a method that will usually make all happy.
Beforehand, make sure the band knows these will be the rules. Write it into the contract.
Tell them you will sit with them after all the tracking is done (or when they give you the tracks if they were tracked somewhere else). You want to know what bands inspire them if any, be sure to tell them you don't want to emulate. You just want to get a grasp of what general sound they like. Take notes! Ask about guitar tone, vocal levels, and snare/kick sound. Ask about any ideas they already have such as crossfades, FX, etc.
Tell them you will email or snail-mail the songs for their critique or approval. Make sure they know you mix alone for a set rate (read more below). OR you will mix with them for an hourly rate. But be sure they know hourly will cost about DOUBLE because of the rate and the fact they will slow you down by critiquing during the mixing process, instead of critiquing when they are at home. So basically you get to mix alone, or have them pay big bucks to be there. Or you can even tell them you only mix alone.
instruct them to listen to it in their car, ipod, computer, home entertainment system etc. What ever they normally listen to music on. This is good because their ears are "trained" for their own music systems. You have spent many, many hours in your listening position with your trusty monitors. The band does not have that experience in your mixing space and they cannot accurately judge the sound based off your system. To them this might sound stupid, but assure them it is not and it is a lot of help for a good mix.
Give them the mixes as you complete them, spend the most time on one song, so you can use it as a sort of template for the rest of the songs. And make sure the band is very clear on all the changes you make and how you achieved it (change log). Be sure beforehand that the band is very articulate in how they word the changes to be made, or talk over the phone if they can't convey in writing what they want done.
Make sure when you send them the files the song has the revision number in the file name (or on the label of the CD if snail mail). Also make sure they are aware of the current charges.
The mixes are on a graduated pay scale to keep from falling into a vicious cycle of an overly picky band(member) wanting revision after revision trying to get a sound that might not even be possible with what has been recorded. In essence they will get a lot of hours out of your flat rate. So here is how to fix that problem....
Now this is only for the flat rate "alone" mixing. If it's by the hour, fine. You make more money the more picky they are.
Here is what I mean for a graduated
flat rate (not hourly) pay scale:
(low prices for example only)
1st mix = $10 =
$10
2nd mix = $10 + $0 =
$10
3rd mix = $10 + $3 =
$13
4th mix = $10 + $3 +$3 =
$16
5th mix = $10 + $3 + $3 + $3 =
$19
etc....
Hourly will be at your estimate, and at a
constant cost but be sure it will cost them. Also give them an estimate how long a song takes and assure them it will be far smoother doing it alone. Not to mention scheduling, you can mix alone at 3am in your underwear.