There is a todo list item to offer an IR export including cal file effects. They are not included because cal files usually roll off at high and low frequencies and including their effect would consequently boost low and high frequency noise in the IR.
I don't understand that comment, since mic cal file are applied automatically to all frequency responses. If you find the measurements pointless don't use the software.
The mic cal file is shown if the box for it is checked. If you don't want to see it, uncheck the box.
Applying cal files to the impulse response has several issues. Cal files do not span DC to sample rate/2, so something needs to be done to fill in the gaps at each end. Simply stopping the corrections is not a good idea because discontinuities in the corrections (or even their slope) will create artefacts in the time domain. Cal files also do not often include phase, so a phase response needs to be generated to apply them to the IR. The options there are to assume zero phase, which means the phase and hence the final time domain result will no longer properly reflect the system magnitude response, or assume minimum phase, but generating that minimum phase response in turn requires the cal response to be extended across the full frequency range and the way that extension is done (including its slopes) will affect the phase result and hence the time domain is again affected. The extensions inevitably involve rolloffs which mean noise in the measurement is boosted correspondingly, it is easy for the IR to end up dominated by artificially boosted noise from the frequency extremes. A final issue is that cal files are not always of good quality, I have seen many that have variations which could not possibly reflect the response of the device they are supposedly calibrating. Not including cal file effects in the impulse response was a considered choice to avoid those issues and ensure the IR accurately reflects the complete system that was measured. It also makes it easier to change or remove cal files after the measurement has been made.
The trace selections for all graphs are remembered for the next startup. If you uncheck the trace it will be unchecked the next time you start REW. If your trace selections are not being remembered there may be some issue with your installation preventing REW from saving preferences.
No, selections should be remembered automatically. That might not happen if an error occurs while REW is closing. If there is an error it may be captured in the log files. The log files are in the user library folder, which no longer appears in Finder by default. To display it either browse to ~/Library/Logs or open your Home folder in Finder (Shift Command + H), select View > Show View Options then select the checkbox to show the library folder. A folder called REW has the logs, can just compress the whole folder and attach the zip file here and I'll check through it.
Hi John,
My macOS system seems to remember its settings OK, so I don't have any explanation for why that doesn't happen on your system. On macOS the startup preferences are stored in ~/Library/Preferences/com.apple.java.util.prefs.plist under a key called room eq wizard, all Java applications using the built-in preference management store preferences in that file under their own keys. It is worth checking that file from time to time in case some application is deleting it or removing the preferences stored in it.
