Hi Frank,As you are aware, there are two parts to what he is doing – the TDA measurement software and the APL1 FIR box.There is also APL Workshop software which will create the FIR tap coefficients and transfer them to the APL1 to create a flat frequency, phase and power(?) response. I don’t know how it deals with things that are not minimum phase but he does talk about in some of his posts.I did something like this manually using Smaart and the Lake controller to get the best result in the room I could. https://www.youtube.com/watch?v=-LLYkGj7ZbkThen I used the Demo software, manually adjusting the frequency response on a Lake LM26 after looking at the acoustic power frequency response graph TDA produced, and time/frequency/amplitude graphs I posted above.The question I had was; did this result in something that sounded better in a room than just using Smaart. Yes I think so … but that’s just one quick poorly defined experiment/test. Edit ... tried a few more tests and it seems to work. It provided a more balanced sound to my ear than I could get with smart or systune. I assume that's because it included those bit of the reverberant sound field that our ears take notice of in the acoustic power frequency response plot.
This is a subject of some interest to me and, for what it's worth, I slogged through Skuruls's patent (US8121302B2, Feb. 2012) to try to see what's there. (It's tough going with the poor English translation and absence of common signal-processing terminology.) ......
Hi Raimonds,My experience and impression so far is the same as John’s in the link you posted. It’s like you are in the studio listening to the band live, not the monitors! As john noted, the reverb detail is extraordinary.
Peter would you care to share some insight on the hardware you used? Just want to get the complete picture as I delve into the unknown of testing and analysis... Thanks in advance..
For anyone late to the party, like me, here's a link to a most interesting thread from ~2008.http://forums.prosoundweb.com/index.php?topic=97505.0--Frank
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