4. Over Hold - This pop-up menu sets the time that over indications are held on
software and front panel meters.
See Working with Front Panel and Software Level Meters for more details.
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5. Keyboard Volume Control - Peripheral, Audio Output - These drop down menus set
the hardware output to be controlled by the Mac keyboard’s volume control. First,
select the hardware peripheral that includes the desired output using the Peripheral
drop down, then select the specific audio output using the Audio Output drop down.
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6. VBus- Apogee’s VBus creates virtual hardware buses to allow expanded routing of
audio within one application or between different audio applications.
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7. Performance Tuning - This drop down menu allows the adjustment of Symphony
driver buffers to take advantage of the latest Intel Macs’ increased CPU power.
Set Performance Tuning to High Performance when using Symphony 64 on an Intel
Mac. This reduces buffer sizes and ensures the lowest latency through the Symphony
System.
Set Performance Tuning to Standard when software buffer settings won’t resolve
clicking and popping issues.
Performance Tuning buffers are set in addition to the buffers typically found in digital
audio applications. If audible clicks and pops are encountered during your session,
first raise the driver buffer size in the audio application. If problems persist set
Performance Tuning to Standard.
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8. Symphony Source - This drop down menu selects the Symphony 64 card ports to
be enabled for use. Ports that have a PC-32 connection to hardware interfaces should
be enabled, while unconnected ports must NOT be enabled. For example, if 1
Symphony I/O is connected to each port of one Symphony 64 card, set Symphony
Source to PCI Card 1, Port 1-2 (Chs 1-64).
System Setup - Standalone Audio Interface Mode
When audio interface mode is set to Standalone, the following controls are displayed:
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1. Clock Source - This drop down selects Symphony I/O's clock source. The following
sources may be selected.
Internal - Symphony I/O is clocked from its internal crystal.
WC - Symphony I/O is clocked from an external word clock signal connected to the
rear panel WC input.
Digital - Symphony I/O is clocked from a digital audio input. The digital clock sources
listed in the drop down menu vary according to the digital audio inputs included on the
installed I/O cards.
2. Sample Rate - When Clock Source is set the Internal, the unit's sample rate may be
selected using this drop down. When the Clock Source is set to an external source,
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