ALCATECH BPM STUDIO 4 PRO User Manual page 15

Installation
ASIO Driver:
This driver developed by Steinberg, serves as
interface for many multi channel sound cards. It
is usually a bit slower than direct sound driver,
and, in user mode, tends to drop out, if system
resources are low. For the most practical
operations, where background music is the only
objective, they work sufficiently well and stable
though. Usually latency is anywhere between 6
and 50ms, and can usually be adjusted in the
driver options. To avert drop outs when using BPM
Studio, latency should be set to 20..46ms. The
best value is usually determined by trying out.
Some tested cards have been reported to operate
unstable, when used with this driver.
EASI driver:
This drivers, developed by Ematic, performance
in regards of stability, and functionality equals the
ASIO drivers. As a matter of fact, it was developed
as Ematics answer to Steinberg's ASIO. All
statements made about the ASIO, can be applied
to the EASI as well, since these two drivers hardly
differ at all, although the Ematic driver is only
sporadically supported, and therefore is of almost
no importance.
Wave driver (wave out):
This is a very stable driver that can be used
instead of direct sound drivers, although it has
higher latency times. On multi channel cards not
supporting direct sound, or ASIO drivers, this is
the only possibility though, to address different
channels separately. This driver is well suitable
for background music, but hardly for live DJs at
all. Latency times are located between 120 and
200ms.
Select the driver most suitable for your needs res.
available for your sound card in BPM Studio. If
you should encounter difficulties in using BPM
Studio, change the driver type.
All important audio engine, and sound driver
settings are defined on the "Audio IO" tab, located
in the program options.
Read in the according chapter 3.7. How to adjust
BPM Studio's sound card utilization to fit your
needs.
Should you encounter problems playing titles with
BPM Studio try at first to change the following
parameters.
Size of BPM Studio's internal buffer. Change this
value if you occasionally experience dropouts
when playing titles, or the players don't start right.
Size of the drivers buffer. Change this value if
you can not achieve clean audio playback. (This
value can only be edited when using wave drivers.
Lowest Latency
BPM Studio operates with smallest buffer sizes,
and latency times. Deactivate this check box if
you experience difficulties with your sound card.
This option enables you to manually enter the
latency interval of your driver. If necessary
increase this value until you achieve clean
playback.
To use BPM Studio's monitor functions,
you have to perform a sound card test.
Further information about this can be
found in the according chapter: Monitor
functions.