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Mixing after having recorded with a stereo technique: ORTF, XY, NOS, Decca Tree, Blumlein, AB

There are tons of discussions about these stereo techniques (RTF, NOS, XY, Decca tree, Blumlein, AB) but I did not see much with regard to the mix once used them after recording.
After one has recorded using one of these stereo techniques, what procedure to follow in the mixing process? Logically, the tracks should already reflect the stereo effect ... but if we are not entirely satisfied with the result:
What can one do with the 2 tracks in the DAW? If we do not let them as such, at 0 in the mixer, how much panning after each technique?

Blumlein... Oh yeah. ;)

It's been a long time since I set up a Blumlein pair.. I did so this morning for an acoustic guitar track I've been working on for my latest song.

In the past, I'd mostly used Mr. Blumlein's invention on orchestral stuff, small ensembles, strings, horns, etc.

The "traditional" way to set up a Blumlein Array is to use a pair of Ribbons. I don't have any - so instead I used a pair of AKG 414 EB's, both set for Fig 8, with a 150hz roll off, no pad.

The room I tracked in is 12 x 14, with a 7.5' ceiling, old wooden floors, one double pain window.

Blending Blumlein and ORTF Choirs

I'm preparing my mix's for the choirs I just finished recording.

2 DPA 4011A in ORTF
1 Royer SF24 in Blumlein
1 Audix M1280 micro condenser for added detail

Any suggestions of how you blend blumlein and ORTF?

John, did I hear you right... choose which of the two that sounds (fullest, widest most detailed) and add the other to taste?

Any suggestion?


A stereo microphone technique in which two coincident bidirectional microphones are angled 90 degrees apart (45 degrees to the left and right of center).

Blumlein Pair is the name for a stereo recording technique invented by Alan Blumlein for the creation of recordings that — upon replaying through headphones or loudspeakers — recreate the spatial characteristics of the recorded signal.

Blumlein decoding


I would like to know what would be the best way to decode a blumlein configuration, without using a DAW (i usually don't record on laptop and want to hear the result on location.)

I don't plan to buy any mixer soon, but will have the possiblity to have a SF-12 for a few day. I own a sonosax sx-m2 that has an imput impedance of 5k ohms and a clean 76db gain, so at least no trouble there.

Any good matrix? cable? quality DIY?

Thanks for your help!

Full circle around a Blumlein Pair - a capella

Had a fun recording on Sunday. A vocal group at a college about 90 minutes away hired me to record them for an archival CD for the members. 17 singers - I had them stand in a circle around a Blumlein pair (SPC3) with Oktava MK319s for lead vocal and beatbox. No beatbox on this piece, but ended up with some fun stereo placement quite by accident.

Preamp was a Sebatron VMP4000e into a MOTU 24i into Samplitude.

Shure Vert Bar mod to accomodate LDCs in blumlein, etc...

I had the hardest time finding a vert bar to suit my needs with my LDCs, having enough clearance between the two mounting posts to run them head to head. .Below is a modification to the Shure a27m vert bar that will allow plenty of clearance.

you need the Shure a27m vert bar.
you will also need a coupler from fastenal... ex?sku=0148071

Fastenal Co.