Bedienungsanleitung Steinberg Sequel (Seite 87 von 97) (Englisch)

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Setting up your system

System factors that affect performance

CPU and processor cache

It goes without saying that the faster the computer pro-

cessor, the better. But there are a number of factors that

affect the apparent speed of a computer: the bus speed

and type (PCI is strongly recommended), the processor

cache size and of course, the processor type and brand.

Sequel relies heavily on floating point calculations. When

shopping for a processor, please make sure you get one

that is powerful in calculating floating point arithmetics.

Note also that Sequel features full support for multi-pro-

cessor systems. So if you own a computer system with

more than one processor, Sequel can take advantage of

the total capacity and evenly distribute the processing

load to all available processors.

Hard disk and controller

The number of hard disk tracks you can record and play

back at the same time also depends on the speed of your

hard disk and hard disk controller. If you use E-IDE disks

and controllers, make sure that the transfer mode is DMA

Busmaster. Under Windows, you can check the current

mode by launching the Windows Device Manager and

looking for properties of the IDE ATA/ATAPI Controller’s

primary and secondary channel. DMA transfer mode is en-

abled by default, but may be turned off by the system

should hardware problems occur.

Audio hardware and driver

The hardware and its driver can have some effect on reg-

ular performance. A badly written driver can reduce the

performance of your computer. But where the hardware

driver design makes the most difference is with latency.

This is especially true when using Sequel for Windows:

• Under Windows, ASIO drivers written specifically for

the hardware are more efficient than a DirectX driver and

produce shorter latency times.

• Under Mac OS X, audio hardware with properly written

Mac OS X (Core Audio) drivers can be very efficient and

produce very low latency times.

Making settings that affect performance

Choosing a driver for your audio hardware

As described in the section “Selecting a driver and making

audio settings in Sequel” on page 84, it is recommended

to install and use a standard ASIO driver if available for

your specific hardware. Check the manufacturers web site

for the latest drivers etc.

Making audio buffer settings

Audio buffers affect how audio is sent to and from the audio

hardware. The size of the audio buffers affects both the la-

tency and the audio performance. Generally, the smaller the

buffer size, the lower the latency. On the other hand, work-

ing with small buffers can be demanding for the computer.

If the audio buffers are too small, you may get clicks, pops

or other audio playback problems.

• You adjust the buffer size settings in the control panel for

the audio hardware (opened by clicking the “Settings…”

button on the Program Settings page.

Optimizing processor scheduling (Windows

only)

To get the lowest possible latencies when using ASIO un-

der Windows XP (on a single CPU system), the system

performance has to be optimized for “Background ser-

vices”:

1. Open the Windows Control Panel from the “Start”

menu and select “System”.

2. Select the “Advanced” tab and click the “Settings”

button in the “Performance” section. The “Performance

Options” dialog is opened.

3. Select the “Advanced” tab.

4. In the “Processor Scheduling” section, select “Adjust

for best performance of: Background services”.

5. Click “OK” to close the dialogs.

Again, we strongly recommend that you use audio

hardware for which there is a specific ASIO driver!

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