SLIDE 1 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks AUDIO RECORDING TIPS & GUIDELINES LESSON ONE: An Introduction to Digital Audio Creation.

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Presentation transcript:

SLIDE 1 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks AUDIO RECORDING TIPS & GUIDELINES LESSON ONE: An Introduction to Digital Audio Creation

SLIDE 2 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Create Voice Script Record Outside of PowerPoint Create a Voice Script by: –Selecting “File>Print” –Print What: “Notes” Record Single File for Each Slide Name Consistently: –Main Slides: slide1.mp3, slide2.mp3, etc. –Interactive: slide2.mp3, slide2_a.mp3, slide2_b.mp3, etc.

SLIDE 3 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Great Voice, Great Learning

SLIDE 4 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Methods of Adding Audio

SLIDE 5 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone Use Sound-Proof Environment Commercial Quality Microphone Avoid Built-In Microphones

SLIDE 6 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone Microphone Formats: –Dynamic – Expensive and Fragile –Condenser – Cheap and Durable Purchase a Condenser Mic

SLIDE 7 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone Sound Pressure Level – SPL Measured in “dB SPL” Force Applied to Air Particles Highest Closer to Your Mouth Standard Conversation: 60 dB SPL

SLIDE 8 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone Sensitivity Rating Varies by Manufacturer Directly Related to Microphone’s Output High Sensitivity = Quiet Sounds Ratings Closest to Zero (0) Are More Sensitive Adequate Level: -50 dB

SLIDE 9 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone

SLIDE 10 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone

SLIDE 11 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Words of Caution Position Headset Mics Below Your Mouth Keep Mouth Consistent Distance from Stand-Mounted Mics Do Not Hold Mics While Recording

SLIDE 12 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio File Formats Two Audio Formats: –WAV –MP3 Camtasia Works With Either PowerPoint Handles Each Differently: –WAV – Can Be Embedded in PPT –MP3 – Can Be Linked in PPT Work with MP3 When Possible

SLIDE 13 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio File Formats MP3 Minimum Settings: –32 kbps Bit Rate –44 kHz Sample Rate –Mono Channel –16-bit Resolution –22 kHz Bandwidth WAV Minimum Settings: –44 kHz Sample Rate –Mono Channel –16-bit Resolution

SLIDE 14 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio Software Windows Recorder - Free with most version of Microsoft Windows. Access via your Start Menu>Accessories. Will only record WAV files. Audacity - Open source (free license) software. Please note that you will also need to install the LAME Encoder to export as MP3. Access both at AudioEdit Deluxe - Priced at about $ Adobe Sound Booth - Priced at about $200. Access at Adobe Audition - Priced at about $350. Access at

SLIDE 15 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio Bit Rate Amount of Data Processed In Specified Amount of Time Measured in kbps (kilobytes per second) 32 kbps Is Sufficient for Final File 128 kbps Recommend for Files to Be Edited or Compressed Later

SLIDE 16 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio Sample Rate Sample Rate Represents the Rate Each Audio Input Is Recorded to Disk Measured in kHz (thousand cycles per second) CD Quality: 44 kHz Lower, But Adequate Quality: 22 kHz

SLIDE 17 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio Channel

SLIDE 18 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio Bandwidth Frequency Range for Accuracy of Sound 22 kHz Is Adequate

SLIDE 19 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Conclusion