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Topic: Blind test of live source vs recording/speakers? (Read 2018 times) previous topic - next topic

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Re: Blind test of live source vs recording/speakers?
Reply #25

Mr. Krueger, let me start by saying thanks for your ABX comparator and I wish your website were still online. I should have saved the audio files on it!

You can still find them on the Wayback machine:

https://archive.org/web/

There were 3 PCABX.COM web sites that were linked together under the covers to take advantage of promotional deals on web sites of a certain size in that day:  www.pcabx.com, www.cdabx.com and www.pcabx-pr.com


Thanks!

Quote
yet I'd still love to make it work. Would you please share your experience and perhaps give some tips?
What kind of music, and is there any sound reinforcement?    ...Obviously, it will be easier to fool the listeners if the "live" sound comes from a PA system.   

It would help to have some distance between the performers and the audience.  I'm not sure how much space you'll have at a hi-fi show unless you have access to a theater.    And to make it "proper", you should be in a theater, or music hall, or whatever is appropriate for the type of music being performed.

And of course,  do your own experiments before going to the trade show.

The plan is to do cello, acoustic guitar and a small percussive set such as bongo's or djembe drums. Besides that we'll do spoken voice and perhaps singing. We'll probably also do some 'effects' with with a tambourine, or keys.

The room in which we'll be doing the test/show is 8.20 x 6.20 meters. Because listeners will be seated over the entire width of the room, we'll use a minimum of panning between speakers. In order to get a credible width in the soundstage, we'll be using a left, center and right setup.

The recordings will be done in an anechoic chamber. The speakers we'll be using are uni-directional (only to the front), but still radiate relatively wide. These speakers have no front-wall reflection but the musicians in the room do. Therefore we'll use a reflector panel behind the musicians while recording in the anechoic chamber. We'll make photo's and a video ;) .

I intend to do part of the demo 'blind', so I'll need an acoustically more or less transparent screen or curtain. Any tips as to what I could use?

Thanks!

Martijn

Re: Blind test of live source vs recording/speakers?
Reply #26

I intend to do part of the demo 'blind', so I'll need an acoustically more or less transparent screen or curtain. Any tips as to what I could use?


There is a standard theatrical tool called a scrim that is used for this purpose. You can control its apparent optical transparency with lighting. If you want people to see the scene behind it, you light the scene brightly. If you want it to disappear, you drop the lighting of the scene, and increase the lighting where the spectators are.