Bu Ering Of Audio Data; Customizing The Con Guration - Townshend Computer Tools DAT-Link User Manual

68
Table 6.1: Options Available for
Option
narecord.AutoStart
narecord.SkipSilence
narecord. lter.resp. nn . mm
narecord. lter.stopband.atten Float
6.13 Bu ering of Audio Data
Bu ering of audio data was described in Section 5.13 with respect to the
program. The e ects of the bu ering are somewhat di erent when recording audio
DAT-Link
data from the
e ect on recording in terms of delays or latencies.
When the host computer begins retrieving audio data from the
mediately begins acquiring data from its selected digital audio input. The host
computer must then continue to read audio data from the
quickly to keep the bu er from becoming full. If the bu er over ows before the
host computer is nished recording, an error is returned and recording is stopped.
Audio data will never be lost without an error indication. The bu er utilization
can be monitored by the
For applications where ner control over the bu ering is required, custom programs
can be written using the subroutine library described in Section 12 and Appendix
G.
6.14 Customizing the Con guration
Many of the command line options, as well as additional options can be speci ed in
.datlinkrc
the users le in their home directory. The format of this le is described
in Appendix B.3. The options used by
Type Default Description
Bool No
Bool No
String Null
90
. Unlike playback, the internal bu ering has no visible
command described in Section 10.2.
nastatus
are listed in Table 6.1.
narecord
Recording Tutorial
narecord
Automatically start & stop
DAT machine
Skip initial silence inter-
val at the beginning of a
recording.
If non-Null, the speci -
cation of lter response
for sample-rate converter
which converts from nn to
mm samples/second. See
Appendix 7 for details on
using this option.
Attenuation, in dB, of
sample-rate converters anti-
aliasing stopband.
naplay
DAT-Link
, it im-
DAT-Link
suciently