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The Sync toolbar lets you change back and forth quickly between the different
clock settings:
You can also choose the sync mode as follows:
1. Choose Options-Project, and click the Clock tab.
2. Choose the desired clock source from the Clock list.
3. Click OK.
The clock source and the type of synchronization that is used are options that are
stored as part of your project files. For example, one of your projects might be set
up to use the internal clock; a second might use the Audio clock and MIDI Sync
with SONAR as the master timing source; and another might use SMPTE/MTC
Sync as the clock source.
Many technical support requests concern synchronization problems, which are
among the hardest to diagnose and duplicate over the phone. If you experience
problems, before you call, perform as much experimentation and gather as much
information as possible about what does and doesn’t work. The more prepared you
are, the more we can help.
Choosing Clock Sources When SONAR is
the Master
When SONAR is used alone, or with an external device that does not have its own
clock or timing signal, you use one of two clock sources: Internal or Audio.
When the clock source is set to Internal, SONAR uses the clock built into the
computer or the computer’s MIDI interface as its timing source. If your projects
contain only MIDI (no audio), this is the most efficient method of playback.
If your projects contain MIDI and audio, or only audio, you should set the clock
source to Audio. This lets the sound card clock determine the correct speed for
audio playback and automatically synchronizes MIDI playback to match the audio.
For more information, see “System Configuration” on page 628. You cannot use the
tempo ratio controls when using the audio clock, because the audio playback speed
is determined by the audio clock.
When either of these clock sources is used, you can also configure SONAR to drive
other MIDI devices using MIDI Synchronization. For more information, see “MIDI
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