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Digital Audio Basics

Digital Audio Basics. with Bill Wade. About Audacity. Audacity is a free, easy-to-use digital audio editor and recorder. Record live audio. Convert tapes and records into digital recordings or CDs. Edit Ogg Vorbis, MP3, and WAV sound files. Cut, copy, splice, and mix sounds together.

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Digital Audio Basics

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  1. Digital Audio Basics with Bill Wade

  2. About Audacity Audacity is a free, easy-to-use digital audio editor and recorder. • Record live audio. • Convert tapes and records into digital recordings or CDs. • Edit Ogg Vorbis, MP3, and WAV sound files. • Cut, copy, splice, and mix sounds together. • Change the speed or pitch of a recording.

  3. Editing • Easy editing with Cut, Copy, Paste, and Delete. • Use unlimited Undo (and Redo) to go back any number of steps. • Very fast editing of large files. • Edit and mix an unlimited number of tracks. • Use the Drawing tool to alter individual sample points. • Fade the volume up or down smoothly with the Envelope tool.

  4. Edit Toolbar All of the buttons on this toolbar perform actions - and with a couple of exceptions, they're all just shortcuts of existing menu items to save you time. Cut Copy Paste Trim away the audio outside the selection Silence the selected audio Undo Redo

  5. Edit Toolbar Holding the mouse over a tool will show a "tooltip" in case you forget which one is which. Zoom In Zoom Out Fit selection in window - zooms until the selection just fits inside the window. Fit project in window - zooms until all of the audio just fits inside the window.

  6. Splitting / Duplicating • Split - Moves the selected region into its own track or tracks, replacing the affected portion of the original track with silence. • Duplicate - Makes a copy of all or part of a track or set of tracks into new tracks. See the figure below:

  7. Audacity – Main Screen Shot

  8. Import and Export with Audacity Import sound files, edit them, and combine them with other files or new recordings. Export your recordings in several common file formats. • Import and export WAV, AIFF, AU, and Ogg Vorbis files. • Import MPEG audio (including MP2 and MP3 files) with libmad. • Export MP3s with the optional LAME encoder library. • Create WAV or AIFF files suitable for burning to CD. • Import and export all file formats supported by libsndfile. • Open raw (headerless) audio files using the “Import Raw” command. • Note: Audacity does not currently support WMA, AAC, or most other proprietary or restricted file formats.

  9. Recording in Audacity

  10. Recording in Audacity Audacity can record live audio through a microphone or mixer, or digitize recordings from cassette tapes, vinyl records, or minidiscs. With some sound cards, it can also capture streaming audio. • Record from microphone, line input, or other sources. • Dub over existing tracks to create multi-track recordings. • Record up to 16 channels at once (requires multi-channel hardware). • Level meters can monitor volume levels before, during, and after recording.

  11. Removing Background Noise • Get Noise Profile • 2-3 seconds noise only • Select Audio to Filter • Use Slider to Select How much noise to filter out • Preview until desired amount is achieved • Choose Remove Noise

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