Specifications

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Output and Input Port lists
Here, all available Input and Output Ports are listed, together with a number of set-
tings. To change a setting, double click on it and enter a new value with the compu-
ter keyboard. The columns in the lists are described in the table below:
Column: Description:
Checkbox Click here to activate or deactivate a Port. Only active Ports
(shown with a checked box) will be available for audio input
and output.
Device Name The name of the Port. You can change the name of a Port if you
like. The names shown here will appear in the Master window
(Output Ports) and the Input window (Input Ports) in VST.
Audio Buffers This value determines how many audio buffers are used when
playing back or recording audio on the selected Port. See the
section about buffers, below this table.
Buffer Size This value determines the size of the audio buffers for a Port, in
samples. See the section about buffers, below this table.
Note that there are different Buffer Size values for different Sam-
ple Rates (see page 371).
Offset This is an offset time for a Port, in samples. With some audio
cards (usually stereo multimedia cards), there may be a slight
delay on the Input or Output port, causing recorded audio to be
a little “off the beat”. You can use the Offset value to compen-
sate for this.
To find out if you need to change the Offset value for your audio
card, try recording the audio metronome click, by feeding the
audio output of the card back into an audio input (remember to
disable Monitoring in the System dialog first, to avoid feed-
back!). Then zoom in on the recorded audio metronome click in
the Wave Editor and check whether it’s off the beat.
Audio Channels Indicates the number of audio channels associated with each
Port. You cannot change this value.
Sync Reference This column indicates which Port is used as Sync Reference, i.e.
to which audio Port the MIDI playback is synchronized.
You cannot change this value directly in the column, rather Sync
Reference is always set to the
first activated Port on the list. To
select another Port as Sync Reference, you have to make sure it’s
activated, select it and then move it to the top of the list using
the “Move Up” button (see below).
To select whether Sync Reference should be set to an Input or an
Output port, use the Sync Reference pop-up menu in the lower
right corner of the dialog. This is also where you select the pre-
ferred method of Sync Reference (see page 374).