Engineering Design NIDisk Manuel d'utilisateur télécharger pdf (Page 13)

WaveDisk User Guide

Playback parameter screen

To perform a playback, click I/O | Play on the WaveDisk menu. WaveDisk then displays the

Playback parameter screen. This screen allows the user to specify the name of the file to be

played, repetition mode, and buffer mode. Parameters such as duration and sample rate are

predetermined by the file.

I/O device selects the I/O device to use for the playback. A computer may have multiple

"sound card" devices, such as a built-in sound chip and external USB sound card unit.

Filename specifies the name of the file to be played. Include file extensions, for example,

enter "myfile.wav". Filenames may include a drive letter and directory path; otherwise files

are searched for in the directory containing WaveDisk.

Repetition mode indicates whether to play the specified file and stop ("Single") or play the

file repeatedly ("Continuous"). In Continuous mode, WaveDisk reports the elapsed time

since the beginning of playback.

Buffer mode indicates where to cache the sound data while it's being played – in a temporary

memory buffer ("RAM buffer"), in a temporary disk file ("Disk buffer"), or direct from the

sound file ("Direct to/from file"). The first two options require copying the sound file to a

temporary buffer before playback, which can be time-consuming for very long playbacks (>

1 hour). The third option plays directly from the sound file, eliminating this step.

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Engineering Design NIDisk Manuel d'utilisateur Page 13