You mean you are not actually recording these performers?

Piano occupies the space from left of centre to centre. Cello more centre but could be localised a bit right.

Look on record company promotional literature and CD or LP sleeves for photos of the ensembles performing, and carefully study the instrument layout.

As for relative mixing levels, well, I'm sorry to say that you have to use your ears.

Picture this: you have a piano and cello onstage. Think carefully now, where you suppose they're positioned to onstage?

Now to position them electronically.

Step 1: adjust stereo sampled piano for a nice stereo spread.

Step 2: add a judicious amount of short, hall style reverb to the piano.

Step 3: Adjust cello sample to be mostly centered.

Step 4: add a small amount of short reverb.

Step 5: voila'

Step 6: go watch a concert so you can visualize for the next time in your blind ignorance.

I've never seen a concert nor heard a concert since I'm blind and deaf and would like to know how to make recording that sounds like George Massenburg did it??

Give me a break.
As Remy Ann David

You really weren't serious weren't you?

RemyRAD wrote:

Step 5: voila'

How do you position the viola?

Bob, pi is 22 divided by 7 not 7 divided by 22.

Maybe you're thinking about a lefthanded viola??

Otherwise,

Step 5: voila' (arms raised above head flailing about)

Sorry didn't mean to leave that out.

Sincerely yours
3.1428571428571428571428571428571etc., etc., ad infinitum

(Well there's a pie in-your-face response.)