Pitch and time stretching in Ardour

In the old (analogue) days, these were related issues. The way you shifted pitch was by speeding up or slowing down the tape; fixing speed (e.g. Beats per Minute) involved changing pitch. Perhaps the most famous example of this is in the middle of Strawberry Fields where George Martin and Geoff Emerick were asked by John Lennon to splice together takes in different keys and tempos—which they did by speeding up the slower version (in A) and slowing down the faster one (in B) and hoping nobody noticed the slight jump.

Nowadays, of course, they can be independent (but don’t have to be). You can adjust pitch while maintaining speed, and adjust speed while maintaining pitch.

Here are some quick notes to myself on pitch and time shifting in Ardour, based on experiments I did yesterday. Read the rest of this entry »


Archaeology as Installation: Jerusalem’s Temple Mount and the Davidson Center for Exhibition and Virtual Reconstruction. Lecture by Lisa Snyder (UCLA). November 24.

Lisa Snyder from the UCLA Institute for Digital Research and Education will be in Lethbridge to speak to my Digital Humanities class on Monday November 23, 2015. She has also agreed to give a second talk, “Archaeology as Installation: Jerusalem’s Temple Mount and the Davidson Center for Exhibition and Virtual Reconstruction.”

The talk will take place on Tuesday 24, 2015 10:50-12:05 in Room L1170a (Linc building).

At the heart of archaeology is interpretation, and one of the greatest challenges for an archaeologist is communicating the results of their excavations with both the general public and other researchers. In 1999, the Israel Antiquities Authority turned to the Urban Simulation Team at UCLA to address this challenge through a landmark installation for the Davidson Center in Jerusalem. Since the Center opened in 2001, visitors to the site have had the opportunity to take a virtual tour of the reconstruction model with an archaeologist guide in an interactive Read the rest of this entry »


Mediawiki updates break previous install (solved)

My ISP Dreamhost updated MediaWiki (the software that drives Wikipedia) last week. The result was that all Wikis on my domains broke.

There were two sets of problems as it turned out.

1054 Unknown column ‘page_links_updated’ in ‘field list’

The initial symptom was a page that read

Database error

A database query error has occurred. This may indicate a bug in the software

A quick search found that I could get more information to add $wgShowSQLErrors = true; to LocalSettings. Read the rest of this entry »


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