Multiple Unit Playback - Townshend Computer Tools DAT-Link User Manual

9.3 Multiple Unit Playback

devices used in stereo mode, the left channel always precedes the right channel. For
example, the string, \
0L,3S,2R
Channel 0 - left input of unit 0
Channel 1 - left input of unit 3
Channel 2 - right input of unit 3
Channel 3 - right input of unit 2
9.3 Multiple Unit Playback
Similarly to , the
dlmrec
played back using multiple
the data le formats generated by
The block-interleaved is preferable as it results in signi cantly less CPU load since
no reorganization of data is required by the host CPU.
Synchronization of the multiple units requires that the Sync connectors of each
DAT-Link
of the +'s are wired to an external clock as described in section 9.1.1.
then uses the external clock as a master source and locks each
Dlmplay
to the bit and word external clocks. The
that playback begins simultaneously for all units.
When is used with version 1.5 or older of the
dlmplay
rates can be synchronized by connecting the word clocks connectors on each units
together using a BNC cable. Start-time synchronization is not available on these
units.
As an example, to playback a 6-channel, block-interleaved le at 44,100 sam-
DAT-Link
ples/second using 3
dlmplay -E -S 44100 filename
Note that the block-interleaved le contains a header describing the number of
channels, precision, etc. so these do not need to be speci ed on the command line.
The speci es the use of the external clock signal.
-E
As with , if any unit connected to the external clock is not involved in a par-
dlmrec
ticular command, it should be forced ready with the help of
the channels can be redirected with
.
dlmrec
The manual pages in Appendix G provide more information about the command
line arguments and usage of
", would create the following channel map.
program allows a multi-channel data le to be
dlmplay
DAT-Links
. The
dlmplay
and automatically recognizes the format.
dlmrec
signal is then used to guarantee
READY
units, you can use the command:
's option as described previously for
dlmplay -u
and .
dlmrec dlmplay
85
program accepts either of
DAT-Link
DAT-Link
, the sampling
. Furthermore,
dlmkrdy
+