Podcasting: File compression and audio compression | Tech Help for Churches

Podcasting: File compression and audio compression

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http://TrinityDigitalMedia.com/thfc On today’s Tech Help for Churches, Podcasting: File compression and audio compression

People use a single term (compression) for two different things: file compression and audio compression.

Audio compression uses either software or hardware to compress the differences between very loud signals and quiet ones. You do this to keep people from constantly raising and lowering the volume to make quiet parts louder only to make loud parts quiet moments later.

In contrast, file compression takes a large, uncompressed file (like a WAV or AIFF) and compress the size of the file and turning it into, for example, an MP3 or AAC. These are lossy file formats, though are are lossless file formats.

When you apply lossy compression, part of the file are thrown away, never to return. Ideally, you’d record, edit, master and THEN compress into MP3 or AAC. Every time you decompress the file, you lose information, so you could easily end up with a file that’s not very good afterward.

The algorithm tries to remove information that not as necessary. It just doesn’t always get it right.

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Paul Alan Clifford, M.Div.

Paul Alan Clifford, M.Div. has been a tech volunteer with Lexington City Church (formerly Quest Community Church) in Lexington, KY since 2000 and is the founder of TrinityDigitalMedia.com, llc. He became part of the technology in ministry team when his church’s attendance was around 200 in one Sunday service and has witnessed it’s growth to a peak of 5,200 average weekly attendance in one Saturday service, four Sunday services in one online and two physical campuses. He literally wrote the book on podcasting in churches, twitter in churches, & servant-hearted volunteering, as well as writing various articles for publications like “Church Production” and “Technologies for Worship” magazines. He has thousands of members of his ProPresenter Users' Group on Facebook and thousands of subscribers to his YouTube channel.