OminMic and PCD - the great FRD Conundrum

[bwaslo]

You shouldn't need to delete the returns (other than the one after the header), there shouldn't be any redundant ones in the OM frd file. The suggestion only came up because in the past there have been cases of where blank lines or (same) several returns in a row have upset some file reading routines.

[arlis_1957@yahoo.com]

i only deleted them after they would not load as they were.
man, im supposed to have these ready by may 1. will be by pe this comming wed and want to get whatever parts i dont have.

[Jeff B.]

i only deleted them after they would not load as they were.
man, im supposed to have these ready by may 1. will be by pe this comming wed and want to get whatever parts i dont have.

OK. I got the files. Both of them had an empty line at the top. I deleted that so the file began with the first set of data and both loaded fine afterwards.

I wouldn't take them directly into PCD though. I would "process" them in Response Modeler first by extending the low frequency roll-off, using the Hilbert -Bode extraction, etc. But they should be good to go.

By the way, the files that Response Modeler creates has two header rows at the top and they always load Ok with them present. I'm not sure why some other don't.

[arlis_1957@yahoo.com]

yes, after removing the top blank line they loaded fine. thanks. i dont know how to extend the low end. could you give me a hint? with phase included, i still should extract?

[Jeff B.]

yes, after removing the top blank line they loaded fine. thanks. i dont know how to extend the low end. could you give me a hint? with phase included, i still should extract?

Pull your tweeter frd into RM. Turn on the highpass filter transfer function. Select a second order butterworth shape. Then dial in the frequency until it matches up with the roll-off of your tweeter before it begins to flatten out.

You can also raise or lower the level to match whatever sensitivity you want to work in - advertised or otherwise. Make whatever other adjustments you feel are necessary (smoothing, etc.) Save the file. Then extract minimum phase.

Remember, when using minimum phase files always plug your offsets into PCD.

Jeff

[arlis_1957@yahoo.com]

thanks

[arlis_1957@yahoo.com]

bill sent me a reworked app this morning. im glad to report that the files saved-eported-imported just fine. thanks bill.

[parodielin]

bill sent me a reworked app this morning. im glad to report that the files saved-eported-imported just fine. thanks bill.

Is this going to be released as an update to OmniMic?

I just had the same issue. I turned on the phase so my exported frd has three columns. PCD won't read it but lspCAD read it fine for now.

[arlis_1957@yahoo.com]

my guess is yes. he will have to make it an executable upgrade.