Townshend Computer Tools DAT-Link - 6.2 Running the narecord Program; 6.3 Front Panel Indications

6.2 Running the narecord Program 63
6.2 Running the narecord Program
The narecord program allows you to transfer audio data from the DAT-Link to a
disk le. It has numerous options, but in its simplest you may simply type:
narecord file
where le is the name of a le containing the audio data. In this form, narecord
accepts stereo audio data and stores it as 16 bit signed integers. Recording will con-
tinue until the program in interrupted using the UNIX interrupt character (usually
control-C). Note that if recording is interrupted, the end of the recording maybe
truncated { leave a few extra seconds after the signal of interest has ended b efore
interrupting narecord .
If you are running narecord on a machine on a local area network other than the one
connected to the DAT-Link ,you will need to set the AUDIO DEVICE environment
variable before running narecord . See Section 3.2 for more details.
The following sections describe the various options available to override the defaults.
A short summary of these options is available at any time by simply typing:
narecord -help
You can also refer to the online manual page (a copy in included in Appendix G).
6.3 Front Panel Indications
While the DAT-Link is accepting audio data from one of its digital audio outputs,
the Record LED on the front panel should be on. This light can be used to tell
when to begin when making a live recording. In addition, the Lock LED should
also be on, indicating that the DAT-Link is receiving a valid digital input.
On the DAT-Link +, there are a number of additional front-panel indications. The
top Left and Right Level LED's indicate when the record level exceeds -1 dB relative
to full-scale. This is often indicative that clipping is taking place. The lower Level
LED's provide activity indicators that are lit when the record level exceeds -30
dB. The Pause LED is lit whenever the DAT-Link + is paused either internally or
externally. This may b e due to synchronization with external equipment or due to
explicit control using the naset program's pause control.
6.4 Selecting the Input Source
Since there are three possible sources for incoming digital audio data, the user must
select which input is active using the -i option. The possible arguments to the