Wednesday, December 28, 2016

setting up SPF and DKIM with CPanel and WHM

CPanel and WHM make the process of setting up SPF and DKIM fairly straightforward.

To open the CPanel of a particular user from WHM, typing Account in the top left search box shows "List Accounts" - Home -> Account Information -> List Accounts. There, clicking on the CPanel icon opens up CPanel for that user account.

Within CPanel of the relevant domain, typing DKIM brings up the required link - Home -> Email -> Authentication

A single click on that page enables or disables DKIM and or SPF.

(Actually I had run the certificate creation etc using scripts under cpanel running as root user and so on, but most probably all that was not necessary.) 

Wednesday, December 14, 2016

problem with BuTT overwriting recordings

I had entered the wildcard for index as filename%n - but then BuTT was saving a file called filename%n.mp3 and was prompting to overwrite old recordings. 

The correct wildcard for index is %i - and for timestamp, it is %H%M%S - have now changed to %i as given at

Tuesday, December 13, 2016

raw 14-bit images with Canon 1100D

According to wikipedia, our Canon EOS 1100D camera is capable of saving to RAW 14 bit CR2 format!
To convert linearly,
suggests dcraw with the following commandline - 

dcraw -v -4 -H 0 -W -w -q 3 file.nef

below is a command which can be saved as a batch file (filename.bat) which works on Windows XP for linear conversion to tiff, for all files in the folder. Tested working on Windows 8.1 also. 

for /r %%i in (*.CR2) do dcraw -v -4 -H 0 -W -w -q 3 -T %%~nxi

A similar shell script on Linux / Mac would have the following form, adapted from

for f in ~/path/*.CR2
dcraw -v -4 -H 0 -W -w -q 3 -T "$f"

The -T makes dcraw output a TIFF file instead of the default Portable Pixmap PPM file. 

Sunday, December 11, 2016

upgrade to live broadcast system

After five years, the live audio broadcast method at mandir has changed. There were a couple of unexplained random shutdowns of the Macbook Pro, so PB decided to upgrade hardware and software. Current setup uses physical cables instead of JackOSX, and upgraded versions of Reaper and BuTT on a Mac mini running Mac OS Yosemite. Compressor is also hardware - our trusty Behringer MDX2200. Settings were adjusted for fast attack and slow release (1.5 sec). Lots of gain to compensate the compression. Level set to +4dBu and not -10 dBV.