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- 27. _S_o_u_n_d__T_r_a_c_k__A_u_d_i_o__T_o_o_l
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- _S_o_u_n_d_T_r_a_c_k (invoked as _s_o_u_n_d_t_r_a_c_k) is a graphical
- application for recording and assembling multi-channel audio
- projects. SoundTrack supports non-destructive editing and
- processing with multiple levels of undo/redo for up to 32
- tracks of audio. The program can also import and export a
- wide variety of soundfile and sample formats. Cut-Copy-
- Paste functions allow easy transfer of data to and from
- other digital media applications such as Movie Maker.
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- While running SoundTrack, the help menu provides access to
- detailed information about creating and editing audio
- projects. Also, please see the manual page (soundtrack) for
- a list of program features and basic techniques.
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- 27.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
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- +o The selection semantics for importing multi-channel
- (e.g. stereo) files has been improved. If no tracks are
- selected, SoundTrack adds two new tracks to the end of
- the track list. If one track is selected, the first
- channel is written to that track then SoundTrack
- inserts any additionally required track after the
- selected track.
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- +o Previewed movie information is now saved with along
- with the rest of the project information.
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- +o Users now have the option of importing the audio from a
- movie when the movie is opened.
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- 27.2 _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
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- This section lists problems in the IRIX 6.5 version of the
- software and ways to work around them.
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- +o The program does not handle running out of disk space
- very well at this time. Be sure to set the project
- directory ('File | New') to a drive with plenty of
- space for recording and processing. To help deal with
- space issues, the status line at the top of the main
- application window displays both the available disk
- space as well as the amount of space taken up by the
- current project.
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- +o If the program is invoked from a directory where the
- user does not have write permission, it will attempt to
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- reset the working directory to a write-able temporary
- file directory. In this case, the user should invoke
- 'File | New' prior to any recording or editing
- operations in order to set the project directory
- properly.
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- +o During recording and editing, SoundTrack creates
- temporary files in the current project directory with
- the filename prefix "_temp". If SoundTrack is not
- exited normally, these temporary files may still exist
- in the project directory. You may need to remove these
- files manually. Hint: saving the project file
- regularly during a session helps to manage errant temp
- files as well as prevent the loss of data in the event
- your work is interrupted.
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- +o When playback/recording starts, the audio input port
- which reads the record signal is synchronized with the
- output port which is playing back the other tracks.
- After this initial sync-up, no additional sync
- alignment is performed. In general this will not be a
- problem; however, if there are drop-outs in either of
- the audio port streams, they will no longer be
- synchronized. This situation occurs when other system
- processes interfere with the audio thread's access to
- the cpu. In the future, we anticipate implementing
- periodic sync correction beyond just the initial
- startup.
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- +o This revision of the program does not handle automatic
- monitor operations such as muting a track while it's
- being recorded over or passing the input signal through
- to the output while recording. To hear the input
- signal, select the monitor option in the audio control
- panel. Note that if you are recording from a
- microphone (not line) input, it's best not to monitor
- the signal through a nearby speaker since this can
- cause noisy feedback.
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