Apple Soundtrack Pro 2 - Manual (Page 516)

516 Appendix E Solutions to Common Problems and Customer Support
Solutions to Common Problems
The following tips address some common issues.
Audio Files and Audio Interfaces
There are several factors that can affect performance when working with digital audio
files. Observing the following guidelines will help you maintain the highest possible
performance when working with Soundtrack Pro projects:
 Because digital audio files require intensive processing by the computer’s processor,
do not perform other processor-intensive tasks while working in Soundtrack Pro.
 External audio interfaces connected to your computer can be susceptible to latency,
a noticeable delay between the time the audio signal is produced and the time it
reaches the computer. Some hardware and software manufacturers offer guidelines
for reducing the amount of latency for their equipment. Be sure to read the
documentation that came with your audio interface.
 If you are using a USB audio interface, make sure the audio interface is directly
connected to your computer. Do not connect a USB audio interface through a USB
hub, or chain it through another USB device.
 If you experience unwanted noise or hiss, check the connections between your
computer and any external audio devices. Refer to the documentation that came
with each device for any additional instructions on dealing with noise.
Eliminating Recording Latency
You can use the Latency Compensation setting in the Preferences Recording pane to
eliminate any latency inherent in your recording device. You calculate the latency by
playing a loop and recording it at the same time, as described below:
1 Use an appropriate cable to connect the audio output port you are using to the input
port for the device from which you plan to record.
2 Choose a loop with a large number of transients, such as a drum loop.
3 Set the tempo to 60 bpm (to simplify the latency calculation).
4 Click the Arm for Recording button in the header of the track to which you want to record.
5 In the Recording tab, set the Input device to the recording device.
6 Set Monitor to None and ensure that hardware monitoring on your recording device is
turned off. You may also need to reduce input or output volumes of your devices in
order to avoid feedback.
7 Click the Record button and let the loop play for a few seconds. Then click Stop.