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

2. SLIDE 2 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Create Voice Script Record Audio Outside of PowerPoint

3. SLIDE 3 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Great Voice, Great Learning A Monotone Speaker Will Lose The Learner With Enthusiasm! Tone Fluctuation! Good Annunciation! PRACTICE!

4. SLIDE 4 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Methods of Adding Audio Best Quality If You Create Entire Program No Drastic Future Updates Team Project Extensive Future Updates

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

6. SLIDE 6 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone DYNAMIC Expensive Fragile CONDENSER Cheap Durable ✔

7. 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

8. 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

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

10. SLIDE 10 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Selecting a Microphone USB3.5 MM JACK

11. SLIDE 11 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Words of Caution Position Headset Mics Below Your Mouth Keep Mouth Consistent Distance From Mics Do NOT Hold Mics While Recording X

12. SLIDE 12 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio File Formats Camtasia Works With Either PowerPoint Handles Each Differently: –WAV – Can Be Embedded –MP3 – Can Be Linked Work With MP3 When Possible Two Audio Forms: –WAV –MP3 NOTE: MP3s MUST Be Placed in the Same Folder as Your PowerPoint

13. SLIDE 13 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Minimum Settings MP3WAV 32 kbps Bit Rate 44 kHz Sample Rate Mono Channel 16-bit Resolution 22 kHz Bandwidth 44 kHz Sample Rate Mono Channel 16-bit Resolution

14. 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 http://audacity.sourceforge.net/ http://audacity.sourceforge.net/ AudioEdit Deluxe - Priced at about $25. http://audioedit.mystikmedia.com/ http://audioedit.mystikmedia.com/ Adobe Sound Booth - Priced at about $200. Access at http://www.adobe.com/products/soundbooth/ http://www.adobe.com/products/soundbooth/ Adobe Audition - Priced at about $350. Access at http://www.adobe.com/products/audition/ http://www.adobe.com/products/audition/

15. 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

16. 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

17. SLIDE 17 Audio Recording Tips & Guidelines | © 2009 Knowbase Networks Audio Channel MONO = One Track for All Speakers STEREO = Separate Tracks for Each of Left and Right Speakers 5.1 = Multiple Tracks For Up to 6 Speakers For Narration Mono Channel Is Adequate Mono Channel Minimizes File Size Background Music Can Be Saved as Mono

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

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