User manual SONIC FOUNDRY SOUNDFORGE 6.0E

[. . . ] After you start Sound Forge for the first time, the registration wizard appears. This wizard offers easy steps that allow you to register Sound Forge online with Sonic Foundry. Alternately, you may register Sound Forge online at www. sonicfoundry. com at any time. Registering your product provides you with exclusive access to a variety of technical support options, notification of product updates, and special promotions exclusive to Sound Forge registered users. [. . . ] For more information, see Repeating an operation on page 132. Repairing audio Sound Forge provides several ways to repair audio glitches. Copying the other channel For glitches in a single channel of a stereo file, Sound Forge can replace the glitched section of damaged channel with the corresponding data from the "good" channel. EDITING, REPAIRING, AND SYNTHESIZING AUDIO CHP. 10 137 Damaged data in the right channel is replaced with data from the left channel Note: This method only works if both channels contain similar audio. 1. Create a selection in the channel containing the glitch, three or four times longer (maximum 50 ms) than the glitch itself. 3. From the Tools menu, choose Repair, and choose Copy Other Channel from the submenu. Sound Forge replaces the selected data with the corresponding data from the "good" channel. In addition, Sound Forge creates rapid crossfades at the beginning and end of the replacement selection to prevent a new glitch from being created. Note: If this method fails to repair the glitch, undo it and apply Copy Other Channel again, this time using a longer selection. Interpolating new audio This is the most basic method of repairing glitches. Sound Forge simply interpolates new audio data based on the data at the beginning and end of the selection. This method results in a straight line connecting the beginning and end of the selection. Interpolation should only be used to repair small (less than 2 ms) glitches. Interpolated data Data is interpolated within the selection CHP. Right-click the data window and choose Zoom from the shortcut menu, and choose In Full from the submenu. If you are using the full version of Sound Forge, the file displays at a 24:1 zoom ratio. If you are using Sound Forge Studio, the file displays at a 1:1 zoom ratio. 3. Note: To improve the accuracy of this feature, the selection should be as small as possible while still containing the glitch. From the Tools menu, choose Repair, and choose Interpolate from the submenu. Sound Forge replaces the glitch data with interpolated data. Replacing audio with preceding data The Replace tool allows you to repair audio files by replacing the damaged data with the data immediately preceding it. This repair method is useful for repairing longer glitches such as needle drops and scratches. Selection data Replacement data Selection is replaced with data preceding it 1. From the Tools menu, choose Repair, and choose Replace from the submenu. Sound Forge replaces the selection with the selection of identical length immediately preceding the damaged data. In addition, Sound Forge creates rapid crossfades at the beginning and end of the replacement selection to prevent a new glitch from being created. EDITING, REPAIRING, AND SYNTHESIZING AUDIO CHP. 10 139 Repairing audio glitches manually with the Pencil tool The Pencil tool is for users who prefer to repair their audio glitches manually. This tool allows you to repair waveform glitches by redrawing the damaged waveform section. However, the Pencil tool can only be used when a file's waveform displays at a zoom ratio of 1:32 or lower. 1. [. . . ] SMPTE 30 is commonly used when synchronizing audio applications such as multitrack recorders or MIDI sequencers. This format is not used when working with video. SMPTE Film Sync (24 fps) The SMPTE Film Sync time format runs at 24 fps (frames per second). This frame rate matches the standard crystal-sync 16/33 mm film rate of 24 fps. SMPTE TIMECODE APPENDIX C 255 APPENDIX D About IRCAM files Using CSOUND, MTU, IRCAM, BICSF , and EBICSF Files Although Sound Forge supports a large number of sound file formats directly, it does not support the CSOUND, MTU, IRCAM, BICSF or EBICSF file types. However, you can use the Raw File Type capabilities of Sound Forge to extract sound data from these file types. The IRCAM or IRCAM-Gross format consists of a 1024-byte header prior to the audio data. [. . . ]