Realtime UAD Processing with UAD plug-ins in Console uses DSP differently than when UAD plug-ins are used within a DAW. To maintain the lowest possible input latency, UAD plug-ins used on a single Console input are “chained” and must be processed within a single DSP chip. Therefore, it is possible to get a DSP/PGM/MEM limit exceeded message even though the UAD gauges may indicate there is plenty of DSP/PGM/MEM available.
Session, plug-in, and I/O preset files saved within Console will not be saved if the "/" (forward slash), "\" (back slash), or "?" (question mark) characters are in the filename. Avoid these and other special characters when saving Console presets of any type.
Sample Rate Changes
For optimum results when using a DAW, perform sample rate changes within the DAW settings (instead of the Console Settings window).
For important information related to sample rate changes with Windows WDM system audio, see this article.
UAD Resource Usage
Apollo Twin USB uses DSP and memory for its internal DSP mixer. Therefore, the UAD Meter & Control Panel program will show some DSP and memory usage even when UAD plug-ins are not in use.
When logged into the computer under an account that does not have administrator privileges, saving UAD preset files via the UAD Toolbar will result in an "Unable to save preset file" dialog. If this occurs, either log in with an administrator account, or use the DAW's preset management tools.
What is the lowest Hardware Buffer setting I can use with Apollo Twin USB for stable operation?
The audio interface hardware I/O portion of Apollo Twin USB can run at any hardware buffer setting that is stable within the DAW itself. Results may vary as a result of how much the DAW session stresses the computer system. This can be influenced by:
- Session track count and sample rate
- How many processor-intensive native plug-ins (such as virtual instruments, convolution reverbs, etc.) are in the session
- Processor type, speed, and overall power of the computer
Of course, for the lowest possible latency when monitoring live inputs, we recommend using the included Console program to take advantage of Apollo Twin USB’s unique Realtime UAD Processing feature, where DAW I/O hardware buffering does not apply at all.