Good point Shelby.....yeah, I think you and Nalleh would benefit a lot from dood's system and being able to measure the TR of each of your devices to see how they're combining. It was certainly an eye opener for me when I started measuring independent TR devices all time aligned on one plot....that was how I discovered platform bending was the biggest enemy of natural feeling single digit TR because the drivers started working against each other. There's no way I could have made that discovery with VS especially with the single digit responses that needed to be measured and the limitation of only measuring one driver at a time.True about the VibSensor(s) and I’m sure d00d’s is great!! I’ve been saying this for a while now, I need to build one!! But even if the phone VS may not be the most accurate, and not good below 10hz or even much above 30-50hz (and the lack of multiple locations (yes multiple locations would be awesome!!), it’s still (IMHO) a fantastic tool to have in your tool bag to work with in that very important 10-30hz area. I think its accurate enough in the 10-30 hz area for what most of us need and is easily repeatable, making it easy to track changes in your systems TR with different components that may be added and combined in ones system, showing timing changes etc pretty darn well and most definitely helps to tune with, in conjunction with the ole butt-o-meter. Truly accurate and the be all end all, of course not, but close enough for what most of us need and doesn’t cost anything. Not that I wouldn’t love to mess around with a multipoint ultra-high end VibSensor set up
Just my .2 cents
I think we've all found using REW for optimizing room response has netted additional SPL and highlighted holes in our system response that we didn't know about until we started using REW (and MSO). Same with TR, but even more so from a timing error perspective since TR is much more sensitive to timing.
We really don't know how much TR is being left on the table until we measure each TR component and put them all on one chart similar to how REW does it. That's what dood's system can do.
Not knocking VS, just calling attention to it's limitations as a vibration measuring device in our hobby. It's hard to describe what I'm talking about but once you see vibration of all devices on one plot similar to how REW does it with SPL, then you start to realize how powerful it can be for optimizing all TR devices so they're working together....within milliseconds....even better than the ole buttometer
Said another way, I thought my system sounded pretty good years ago. But, then I started using REW and realized I wasn't even close to reaching the full potential of my investment and my room.
Same with multiple TR devices all on one platform....it's hard to know what's being left on the table until each device can be measured and displayed time-aligned. Even the 10-30Hz range has significant cancellations happening that VS won't be able to detect on it's own.
With all the investment in multiple TR devices, another couple hundred dollars for dood's system would be money well spent for anyone wanting to combine those TR devices and ensure they're getting the most from their investment.....just like REW does for us and our room responses today.