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soundtrack(1)							 soundtrack(1)

NAME    [Toc]    [Back]

     soundtrack	- multitrack digital audio recorder/editor

SYNOPSIS    [Toc]    [Back]

     soundtrack	[ -display displayname ] [ filename ]

DESCRIPTION    [Toc]    [Back]

     SoundTrack	is a graphical application for recording, editing and
     processing	up to 32 tracks	of audio. SoundTrack can be used to create
     multi-element soundtracks for movies, commercials,	and web	pages.	A wide
     variety of	soundfile formats is supported for import/export and
     cut/paste.	 Also, SoundTrack allows pre-mastering of digital audio	tapes
     via the export-to-DAT feature.

     For more detailed instructions on using soundtrack, access	the on-line
     help facility via the "Help" menu item on the right side of the main
     menubar. Also, please read	the soundtrack chapter of the IRIX release
     notes for digital media which contains important up-to-date information
     on	the current release of the program.

     SoundTrack	provides the following major features:

     -	 Realtime audio	recording and playing of up to 32 tracks of audio.
	 The total number of tracks which can be played	back simultaneously
	 depends on the	type of	machine	the program is running on; generally,
	 more powerful systems can play	back more tracks at once.

     -	 An extensive transport	control	area includes controls for starting
	 and stopping record or	playback; for placing markers at specific
	 locations in a	project; for enabling looping and selection playback;
	 and for incrementally increasing or reducing the size of the current

     -	 Per-track controls for	muting,	soloing, setting the volume level and
	 pan position, and selecting the input source.	Use of screen area can
	 be controlled by using	the more/less triangle button which
	 shows/hides the track waveform	displays.  To conserve screen space,
	 you may wish to hide tracks which are not being edited	currently.

     -	 Cut & paste editing of	audio data within soundtrack and between other
	 digital media applications, such as cdplayer and moviemaker.

     -	 Full support for Adobe	Premiere(TM)-compatible	plug-in	effects.
	 Plug-ins for fading in	and out, parametric equalization, DC offset
	 correction, echo effects, and volume changes are shipped as part of
	 the system.  See the Audio Plug-Ins section below for brief
	 descriptions of the standard audio plug-ins.

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soundtrack(1)							 soundtrack(1)

     -	 Multi-level Undo/redo for all essential editing, processing, and
	 track management functions.

     -	 Multiple types	of markers and mechanisms for instantly	moving to a
	 desired marker	or selecting between ranges of markers.

     -	 DAT pre-mastering using the "File | Export" menu item.	 Markers will
	 be used for program and index points.

     -	 The ability to	import audio data from virtually any format of sound
	 file and automatic sample format conversion to	the project's current

     -	 Some or all of	a project can be mixed down (exported) to any of the
	 soundfile formats supported by	the SGI	Audiofile Library.

     -	 Movie files can be opened and played back in sync with	the audio.
	 Markers may be	inserted into the project at specific frames within
	 the movie.  This allows synchronized "spotting" of sound effects,
	 dialog	or music.

OPTIONS    [Toc]    [Back]

     -display displayname
	   Specifies the X display to use.  If none is set, uses the value of
	   $DISPLAY.  If $DISPLAY isn't	set, uses ":0".	 Note that sound will
	   be played on	the host running soundtrack regardless of the display

	   specifies the name of a SoundTrack project file.


     SoundTrack	stores your work in projects.  A project consists of one
     master project file and an	arbitary number	of associated audio files and
     waveform decimation files used for	graphical display.

     The File menu items 'New/Open/Save/Save As' all operate at	the project
     level.  The menu items 'Import/Export' operate on single soundfiles used
     for data exchange with other programs.

     The name of the master project file is the	official top-level project
     name, and this is the file	you select when	you want to open or save a
     project.  A project file does not contain any audio data.	Instead, it
     describes the structure of	the project and	contains the names of
     additional	files which hold the actual audio data and waveform plotting
     information.  This	architecture allows SoundTrack to manipulate the
     project much more quickly and efficiently than storing all	of the audio
     data in a single file.

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soundtrack(1)							 soundtrack(1)

     If	you want to copy or move a project to a	different location, you	must
     copy both the master project file and all the auxiliary files.  To	make
     this easier, SoundTrack uses the project name as a	prefix for all the
     associated	audio and waveform data	files.	You can	copy a soundtrack
     project to	another	location by typing:

	  cp projectname* newlocation

     where projectname is the name of the project file and newlocation is the
     name of the directory to which the	project	should be copied.

     Similarly,	to remove all files in a project, type:

	  rm projectname*

IMPORTING FILES    [Toc]    [Back]

     The 'File | Import' command is used to place existing soundfiles onto
     tracks in the form	of clips.  Before importing the	soundfile, set the
     insert cursor on a	selection of one or more tracks	for the	destination.
     SoundTrack	maps each channel of the source	file to	the next selected
     track so that you can edit	them independently.  For example, if you are
     importing a stereo	soundfile, you should select two tracks	to receive the
     incoming clips.  The imported audio data will be pasted into the project
     at	the location specified by the selection.

EXPORTING FILES    [Toc]    [Back]

     The 'File | Export' command is used to mix	down the project data into a
     single soundfile.	You'll need to use this	command	when you want to
     produce a soundfile that is playable by other sound programs that don't
     understand	the soundtrack project format.	Many options are available in
     the export	dialog box for choosing	the soundfile type and sample
     parameters	such as	sample rate, bit width,	number of channels and
     compression.  This	allows you to compose your project in a	preferred
     working format, but save a	mixdown	to a specific target format.

     During export, the	project	data is	is effectively "played"	into the
     mixdown file. This	is important to	know, since the	settings of the	track
     parameters	(mute/solo/pan/volume) as well as the master volume control
     will be used during the process of	creating the output file.

     Each track	consists of two	parts: a track control strip, and an audio
     waveform editing area.  The track control strip is	always visible and
     contains the track's name,	solo and mute states, volume and pan position
     sliders, and the track input source selector.

									Page 3

soundtrack(1)							 soundtrack(1)

     To	select a track,	simply click on	the Track's name.  The track will
     highlight to indicate that	it is selected.	 To deselect a track, shiftclick
 on the title.

     To	create a new track, select "Create Track" from the Tracks menu.	 A new
     track will	be created after the last selected track (or at	the end	of all
     tracks if no track	is selected).

     To	change the name	of a track, either double-click	on the title or	select
     the track and choose "Set Name..."	from the Tracks	menu.

     To	change the track's volume, simply click	and drag on the	track volume
     selector.	To change a track's pan	position, click	and drag on the	Pan

     The solo ("star") and mute	("speaker") buttons can	be used	to solo	or
     mute a track.  When a track is soloed, only it and	any other soloed
     tracks will be audible during playback.  This function is useful if you
     want to quickly audition a	track by itself.  The mute button will turn
     off a track during	playback.  It can be used if you don't want to mix the
     audio on a	particular track in with the rest of the tracks	during

     The input selector	button is used during recording	to specify whether a
     track should record the left or right channel of the currently selected
     input device.

EDITING    [Toc]    [Back]

     SoundTrack	allows the audio waveforms to be selected in one of two	ways:
     as	continous waves	or as distinct objects (clips).	 We refer to the two
     methods as	linear style and object	style.

     Linear style provides the traditional point, click	& drag approach	to
     selection as implemented in many word processing applications. To cut a
     region of audio data, you just click-and-drag over	the region to be cut
     and then select 'Edit | Cut'.  To paste, click once to set	the insertion
     point and then choose 'Edit | Paste'.  You	can shift-click	to extend the
     selection to another track	or to exclude the track).  Also	note that the
     track strip changes color to indicate that	the corresponding track
     includes the selection.  You can create discontiguous selections by
     shift-clicking on the track strip to add or remove	the track from a

     It	is possible to paste fewer tracks of data than you originally cut or
     copied.  For example, if only a single track contains an insertion
     pointer when you select 'Edit | Paste', only the first track on the
     clipboard will be pasted.	You can	extend the insertion point to multiple
     tracks by shift-clicking on the track strip. So, if you have three	tracks
     of	data on	the clipboard and you want to paste all	three, you can click
     on	the destination	track where the	first clipboard	track will go, and

									Page 4

soundtrack(1)							 soundtrack(1)

     then shift-click on two other tracks to specify the destinations for the
     remaining tracks on the clipboard.	 The advantage of this approach	is
     that you may paste	to any three arbitrary tracks, even if they aren't

     Object style provides edit	selection more like an object-based drawing
     program: you select a clip	by double-clicking within it's bounding
     rectangle.	 After selection, the clip is drawn inverted to	indicate that
     it's selected.  You can add additional clips to the selection by shiftclicking
 on them. This style of selection and editing allows easy
     manipulation of whole clips which are spread out among the	tracks.

     After making a selection (either linear or	object style) on one or	more
     tracks, you may invoke one	of the editing commands	from the Edit menu or
     one of the	plug-in	modules	from the Effects menu.

PLAYBACK    [Toc]    [Back]

     You can start playback either by clicking on the Play button on the
     transport or by pressing the Space	Bar.  If the "Play Selection" button
     (the button immediately to	the left of the	transport) is depressed,
     soundtrack	will always start playing from the beginning of	the current
     selection and will	stop when either the end of the	selection or the end
     of	the project is reached.	 If the	loop button is depressed, soundtrack
     will loop back to the beginning of	the selection.

     If	the "Play Selection" button isn't depressed, SoundTrack	will resume
     playback at the current play location (indicated by the downwards-facing
     arrow which runs along the	top of the ruler).  You	can change the current
     playback position by clicking in the playback indicators display area.
     If	the "Loop" button is depressed but the "Play Selection"	button isn't,
     SoundTrack	will, upon reaching the	end of the project, automatically
     return to the beginning of	project	and continue playing.

RECORDING    [Toc]    [Back]

     Use the system Audio Control Panel	to select the desired input source for
     recording (i.e., microphone or line input).  Also set the input level to
     an	appropriate setting for	recording.  Remember that if the level is too
     low, the signal will be weak and boosting it later	with the Normalize or
     Volume plug-in will also increase the noise level.	 If the	setting	is too
     high, the signal will be 'clipped'	and sound distorted.

     In	order to record	new clip data onto a track, the	track must first be
     selected.	Either click on	the track control strip	(the area containing
     the name and other	controls), or click to set an insert point within the
     clip waveform area.  Either of these actions will enable recorded data to
     be	received on the	track.	You can	record on more than one	track
     simultaneously; simply select multiple tracks by shift-clicking on	them.
     Set the input channel on each track to be recorded	so that	track will
     receive the correct source	channel	of data.

									Page 5

soundtrack(1)							 soundtrack(1)

     Then, hit the PLAY	or RECORD button to start the transport. While
     playing, you may hit the master RECORD button in the transport to toggle
     recording on or off.  To stop recording, you may either hit the transport
     RECORD button again or just hit the STOP button.  A clip will be created
     for each period that recording was	enabled.

AUDIO PLUG-INS    [Toc]    [Back]

     Audio Plug-Ins are	accessed from the "Effects" menu.  The following
     plug-ins are shipped as standard with the current release.	 Additional
     plug-ins may be available from other vendors and will show	up in this
     menu after	installation.

     Echo Plug-In    [Toc]    [Back]

     The echo plug-in adds a repeating echo effect to the selected area.
     There are two time	parameters (in seconds)	that can be adjusted to
     produce different effects.	 The Delay Time	sets the amount	of time
     between successive	echo impulses, while the Reverberation Time sets the
     amount of time it will take for the echo to decay to -60 dB.

     The Preview button	allows the user	to audition the	resulting echo effect
     before committing with the	OK button.  Note: you must turn	off the
     Preview button before adjusting the parameters again.

     Fade In/Out Plug-In

     These modules perform simple linear fades on the selected area, causing
     the signal	amplitude to gradually increase	from or	decrease to zero.

     Normalize Plug-In    [Toc]    [Back]

     This plug-in can help to adjust the level of signals that were recorded
     very low.	It rescales the	amplitude of the audio samples to fit the full
     dynamic range.  Note, however, that raising the level of the signal will
     also bring	up the volume of any noise in the original recording.  If the
     noise level is unacceptable, you may need to re-record the	signal with a
     higher input level	for better signal-to-noise ratio.

     Parametric	Equalizer Plug-In

     This plug-in consists of an equalizer module which	can be used to boost
     or	cut three bands	of frequencies by -20dB	to +15dB.  Each	band is	made
     up	of a second-order parametric filter whose bandwidth, center frequency,
     and gain/attenuation can be adjusted by the user to achieve various
     effects.  While the parameters are	being changed, the corresponding
     frequency response	curves are plotted to help visualize the filter

     Use this plug-in to compensate for	level differences that are restricted
     to	specific frequency areas of the	signal,	such as	"bass" (low
     frequencies from app. 20 -	400 Hz)	or "treble" (higher frequencies	from

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soundtrack(1)							 soundtrack(1)

     app. 8 - 16 kHz) for example.

     The Preview button	allows the user	to audition the	resulting equalization
     effect before committing with the OK button.

     Remove DC Offset Plug-In    [Toc]    [Back]

     This plug-in removes unwanted DC offset components	from the selection
     when the audio signal is not centered around zero.	 These artifacts are
     sometimes produced	by recording equipment and should be removed in	order
     to	re-center the waveform.

     Volume Plug-In    [Toc]    [Back]

     This plug-in increases or decreases the volume of the selection by	a
     given decibel (dB)	value.	Unlike the Parametric EQ, the change of	volume
     will affect all frequency bands at	once.  The module allows a maximum
     change of 8.5 dB which corresponds	to the approximate doubling or halving
     of	the perceived loudness.

SEE ALSO    [Toc]    [Back]

     apanel(1),	cdplayer(1), datplayer(1),
     moviemaker(1), mediarecorder(1), sfinfo(1), mediaconvert(1)

									PPPPaaaaggggeeee 7777
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