Audio Playback

Synopsis

na_play is a general playback program for playing sound files on a variety of platforms and sound cards.

Currently, the following audio devices are supported:

• sunaudio: 8k ulaw direct to /dev/audio found on most Sun machines. This is also found under Linux and FreeBSD, and possibly others. This is the default if netaudio is not supported.
• netaudio: NCD's network transparent audio system (NAS). This allows use of audio devices across a network. NAS has support for, Suns, Linux, FreeBSD, HPs and probably other machines by now.
• sun16audio: This is only available on newer Sun workstations and has been enabled at compile time. This provides 16bit linear PCM at various sample rates.
• linux16audio: This is only available on Linux workstations and has been enabled at compile time. This provides 16bit linear PCM at various sample rates.
• freebsd16audio: This is only available on workstations running FreeBSD and has been enabled at compile time. This provides 16bit linear PCM at various sample rates.
• mplayeraudio: This is only available under Windows NT 4.0 and Windows 95 and has been enabled at compile time. This provides 16bit linear PCM at various sample rates.
• win32audio : This is only available under Windows NT 4.0 and Windows 95 and has been enabled at compile time. This provides 16bit linear PCM at various sample rates, playing the audio directly rather than saving to a file as with mplayeraudio.
• irixaudio: Audio support for SGI's IRIX 6.2.
• Audio_Command: Allows the specification of an arbitrary UNIX command to play the waveform. This won't normally be used with na_play as you could just use the command directly but is necessary with some systems using the speech tools.

The default audio is netaudio if it is supported. If not the platform specific auido mode is the default (e.g. sun16audio, linux16audio, freebsd16audio or mplayeraudio). If none of these is supported, sunaudio is the default.

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