Presentation on theme: "Podcasting in the Classroom Presented by: Jason Arruzza, AIS."— Presentation transcript:
Podcasting in the Classroom Presented by: Jason Arruzza, AIS
What is Podcasting? a digital audio file (usually MP3 or AAC) made available for download on the internet through an RSS 2.0 feed. The web address of the media file is contained in the enclosure tag of an item in the XML file. A podcast's RSS feed is updated each time a new media file is published. An aggregator for podcasts (such as iTunes or iPodder) is used to subscribe to the RSS feed.
Who can podcast? anyone can create their own “radio”-style show and broadcast it to the world in very little time and at very little cost. required: a computer, a mic and the internet.
What is Audacity? Audacity is a rapidly evolving multi-platform soundfile editor that is freely available Audacity includes: a good set of editing tools, support for Linux Audio Developer's Simple Plugin API ( LADSPA) effects, multitrack recording capability. Its user interface is well-designed, uncluttered and simple to navigate. Supported file formats include WAV, AIFF, AU, SND, and MP3; Audacity also exports to OGG format. Standard cut/copy/paste operations are supported as well as Undo/Redo functions.
About sound files The most popular and most common cross-platform uncompressed audio file formats are.AIFF (Audio Interchange File Format - Mac) and.WAV (Microsoft Windows Wave). both support 16-bit, 44 KHz stereo and polyphonic sound (sound with more than two channels). this quality is approximately 10MB per minute in size since it is high quality). audio file formats include u-law, which use the suffix.au and so are often called AU files MPEG audio (suffix.mpeg and.mpg). MPEG files are compressed (ie: ~ 1/5 the size of a.wav or.aiff file) but with a slight loss of quality. When creating a sound file can set preferences to adjust the quality of the file by adjusting Bit Rate, Channel and Sample Width basically choosing a mono channel together with the lowest sample width and the lowest sample rate you will create a lower quality, smaller file. Ogg is an advanced binary audio format similar to the mp3 format. It is patent and royalty free, and is supported on most platforms.
Bit Rate is the frequency at which bits are passing a given "point". quantified using the bit per second (bit/s) unit. bit rate measures number of bits/time 4 kbit/s – minimum necessary for recognizable speech 8 kbit/s – telephone quality 32 kbit/s – MW quality 96 kbit/s – FM quality 128 kbit/s – CD quality Source: Wikipedia
Audacity Activity: Import a sound/music file into a track Record a new voice track over Edit as necessary Add effects Save as.mp3 file
Contact Details Jason Arruzza Education Consultant – ICT Across the Curriculum Level 4, 99 York Street, Sydney NSW 2000 Phone (02) Fax (02) Web aisnsw.edu.au ABN