Originally Posted by audioguy
A question or two:
1. What are most folks using to get accurate speaker delay/distance? In my case, I can use the distances from my Integra but don't want to lug it around doing other installs. Someone suggested REW. How does that work? Measured physical distance won't work in my room since all speakers have DSP engines (which add to the physical distance) in them and many other rooms have some speakers (usually subs) that may have DSP's as well.
2. Probably a dumb questions, but ......With my Integra, Audyssey sets up so that "reference" is set to zero on the volume knob. (I usually listen to movies at 5 to 10 below reference). What is the procedure for trim set up so that there is a "reference" position and how does one know what that reference position is on the volume control knob??
I use REW using my external mic pre that allows for a loop back connection. With the loop back in place and the correct settings enabled with REW ( there is a tick box in one of the setup screens that enables loop back timing reference ).
What one really should do is run the soundcard directly into each amp input and measure, same with subs, directly in to the subs will give the most exact distance or time of flight data.
But I cheat and use the Datasats routing page and shift output channels around. What this does is induce progagation delay but this will be the same for each channel, so by taking this into account you can get a really good and acurate distance / delay setting.
So I run an RCA cable from my sound card to the stereo analogue input of the RS20i. Select this input. Ensure all processing is off.
Then I measure the front left channel. And then go on to shift each channel upto the left and measure them. This will then give you a list of distances that included direct time of flight and and propagation delay. I do the same for the subs.
Once I have these distances, in ms. I find the furthest distance or highest number and this gets called the reference speaker. This gets set to 0 delay in the delays page.
You then subtract each other channels distance from this reference speaker. So let's say the furthest speaker is 20ms. The next speaker say is 15ms. The delay setting for this speaker will be 5ms. And so on.
But you are right in saying that the dsp adds delay. In my system my subs are physically 15ft away, or 15ms. But actually time including delays is around 48ms. This makes my subs the furthest speakers or reference speakers from which all other speaker distances are calculated.
Interms of reference spl settings, this may be dependant on headroom available, but the original manual I think states to set the fader to -7 and calibrate each channel to 85 db with the sides set to 82db and the subs set to 92db.
I think for the home however I think they recommend setting the fader to -15.
So if you set reference to -15 then if the output of the content is at the same level as the rs20i test tones then you know that -15 will be reference.
Originally Posted by thebland
Is there a more current version of the RS-20i manual than the one on the DATASAT website?
Not looking for Auro info, just want to know if there is a newer version before I go through it. THe one on the website is dated Dec., 2012.
I'm not sure if they have written a new one. I highly recommend you don't use the original as it just confuses matters.
I find the RS20i a doddle to use and setup. My biggest tip is to use the machine in expert nav mode. Go to system setup, then more, then select expert nav mode.