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f you have the input gain turned up with nothing connected to that input on ONE’s breakout cable, then you may experience some noise. If you are just listening to ONE’s output and do not have any microphones or instruments connected, make sure you turn the input gain all the way down.
Check to see if “Identify Unit” is engaged. This is found toward the top of the Maestro windows just under the ONE graphic.
Tip – When experiencing clicks and pops on a Mac, try raising the buffer size in the audio app. In
Logic, for example, choose Logic Pro > Preferences > Audio, click the Devices tab, then the Core
Audio tab, and set the I/O Buffer Size to the next highest number.
|The I/O Buffer setting found in most audio software is one of the most crucial, but often ignored, settings in a Mac-based recording system. When choosing a buffer setting, a compromise between the latency through the application and the amount of computer processor power accessible to the application must be made.Latency– the slight delay between the moment you play a note and hear it in your headphones after conversion and processing.
A lower buffer setting results in lower latency but less available processing power. If the application can’t access enough processor power, processor overruns may occur, resulting in audible clicks and pops or error messages that interrupt playback and recording. A higher buffer setting, on the other hand, results in greater amount of accessible processor power (i.e. less chance of overruns) but increases the latency. Determining the best setting requires some trial-and-error in order to find the best compromise.
Keep in mind that as tracks and plug-ins are added to a software session, processor requirements increase. Thus, the buffer setting that works during the early stages of a session might result in processor overruns during later stages. The best strategy is to set the buffer to a lower setting during recording and accept certain limitations on plug-in usage, and then raise the buffer during mixing to utilize the computer’s full processor power when latency isn’t an issue. With the processing power of today’s Macs, you may find that adjustment of the buffer isn’t necessary, and you can leave it at a setting for low latency and still access a sufficient amount of processing power when adding tracks and plug-ins. If you do encounter clicks, pops or software errors, don’t hesitate to experiment with the buffer setting. Please consult the section on Working with GarageBand, Logic and Mainstage to determine how to se the I/O buffer setting is found in your audio application.
In most cases, a steady hum or buzz at the output is caused by grounding issues between the Apogee USB interface and the connected equipment. Because bus-powered USB interfaces are grounded through the USB and audio connections, and not through a 3-prong grounded AC connection, the situation may arise where the grounding configuration of the connected equipment must be modified. Check that the computer is grounded with a 3-prong AC connection.
Some experimentation may be required to find the grounding configuration that results in the lowest noise. It may be useful to disconnect all equipment except the Apogee interface, the Mac and a pair of headphones, and then connect additional equipment one piece at a time to determine the source of the grounding issue.
Decrease the I/O buffer size in your audio application. See “How do I set my software’s I/O buffer?” for more information.
On the Input tab of Maestro, be sure to set Analog Level to Instrument (Inst).