Sampling Tutorial
7
SREV1 Sampling Guide
2 Sampling Tutorial
Assuming that you’ve set up your speakers and microphones and connected your PC to
the SREV1 (see page 17 for hookup examples), you’re now ready to “fire” a few pulses
and “grab” some samples.
We’re assuming that SREV1 I/O is being taken care of by MY4-AD and MY4-DA cards.
If you’re using external A/D and D/A converters, your IRSampler I/O assignments will
need to be a little different to those specified later.
Before we start, turn on the SREV1, insert the CD-ROM containing the SREV1 sam-
pling software, and insert a PC Card memory card. (The RC-SREV1 Remote Controller
is not necessary for sampling.) Finally, start the IRSampler program.
Configuring IRSampler
COM Port (COM Port dialog box)
The COM Port dialog box appears the first time IRSampler is started and is used to
select the PC COM port to which the SREV1 is connected. The selected COM port is
used automatically the next time IRSampler is started, but can be changed at any time
by choosing COM Port from the Setup menu. Choose COM1 or COM2 as appropriate.
Word Clock Source (Word Clock toolbar)
Set the Word Clock source to “INTERNAL” (FS will be “48 kHz”)
Channel Mode (Word Clock toolbar)
Set the Channel mode as appropriate (e.g., 1ch, 2ch, 4ch)
Pulse Generator (Generator/Trigger window)
Set the Generator Source to “TSP64k”
Set the Loop Interval to “5000” msec (i.e., 240000 samples)
The Loop Interval must be long enough so that the reverberation energized by each
pulse has time to fade away completely before the next pulse is fired. If the next pulse is
fired while the previous reverberation can still be heard, the acquired data will be unus-
able, especially when using TSP signals. Obviously, environments that produce longer
reverberation require longer loop intervals.
Start Trigger (Generator/Trigger window)
Set the Trigger Source to “Internal”
Set the Trigger Threshold to “50%”
Set the Trigger Slope to “ABS”
