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SGI Desktop Special Edition 1.1
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SGI Desktop Special Edition 1.1.iso
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dmedia_eoe
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ch04.z
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1995-11-13
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4. _S_o_u_n_d_S_c_h_e_m_e
_s_o_u_n_d_s_c_h_e_m_e is an X-based server daemon which provides
high-level audio playback services for applications. Based
on the audio and audiofile libraries, _s_o_u_n_d_s_c_h_e_m_e mixes and
plays sounds on demand as requested by multiple client
programs using a single audio port. Each client may provide
an X resource file which specifies a palette of sound names
and the mappings of these names to soundfiles. Named sounds
are activated within applications using function calls from
the server's client library. The _s_o_u_n_d_s_c_h_e_m_e server is
started automatically at login from the Xsession file for
SGI's _I_n_d_i_g_o _M_a_g_i_c desktop environment.
For the IRIX 5.3 release, a a small handful of sounds are
assigned to system events (such as launching applications,
dropping file icons and searching for items in the system).
Also, there are no interface tools at this time for user
customization of sounds. However, knowledgeable users may
edit *.soundfile resource items in the client resource files
to assign different soundfiles to defined events. These
client resource files are located at the following default
path:
/usr/share/data/sounds/soundscheme/schemes
Soundfiles referenced within the resource files should be
placed at:
/usr/share/data/sounds/soundscheme/soundfiles
Soundfiles to be used by SoundScheme must be in AIFF-C
format and recorded at 44.1kHz sampling rate. The sound
server will ignore files that do not meet these
requirements.
At this time, the output level (volume) of SoundScheme
sounds may not be changed independently of the system-wide
audio level; altering the system audio level via _a_p_a_n_e_l
(audio control panel) will affect the SoundScheme level as
well.
The SoundScheme service may be disabled by using the _I_n_d_i_g_o
_M_a_g_i_c Desktop Control Panel provided for customization of
the user's environment. This panel contains a Desktop Sounds
checkbox used to set the enabled or disabled status for
SoundScheme. Changed settings will not take effect until
the next login.
To disable the SoundScheme server daemon from starting up at
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all, use _c_h_k_c_o_n_f_i_g to set 'soundscheme off'. In this case,
the change will not take effect until the system is
restarted.
The version of SoundScheme included in the IRIS Digital
Media Execution Environment 5.5 release is the same as the
version included with the 5.3 release.