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What happens when I receive a call while recording with my Apogee interface?

Monitoring and recording is interrupted in Apple GarageBand and other Audio Apps from the ONE for iPad & Mac, Duet for iPad & Mac, Quartet, JAM, JAM96k, MiC, or MiC96k when a call is received. Once the call has ended or declined monitoring and recording is resumed.

Unless calls are more important than creativity? It is recommended that in the iPhone> Settings Do Not Disturb is turned On. This will prevent a call from interrupting that perfect take or inspired performance.

iPhone Settings

Will the ONE for iPad & Mac charge batteries?

The ONE AC adapter doesn’t charge installed rechargeable batteries. These must be removed and charged within a separate charger recommended  for the batteries that are being utilized.


Note: After changing batteries, it is necessary to power cycle the ONE by removing and then re-inserting the USB connector.

How to use the Maestro low-latency mixer with the ONE for iPad & Mac

Maestro Low Latency Mixing

While recording, if you notice a delay between the moment you play or sing a note and when you hear it in your headphones you are experiencing latency. With Maestro’s low latency mixer, you can set up a signal path to hear yourself with minimal latency.
How to set up a session using the Low Latency Mixer

1.    In your audio software, turn off software monitoring.

• In GarageBand, this is done by clicking on the Monitoring button in the Track.

GarageBand input monitoring


• In Logic’s menu bar, choose Logic Pro > Preferences > Audio and uncheck the Software Monitoring checkbox.

Logic X prefs

2.    In your audio software, set up a mix of all playback tracks and route the mix to Out 1-2. It’s suggested to set the audio software Master fader to 0 dB.

3.    In the Maestro Output tab window, set the Output Selection to Mixer. This sends the output of Maestro’s low latency mixer to ONE’s output, rather than sending your audio software’s output directly to ONE’s output.

Maestro output tab
4.    In the Maestro Mixer tab window, set the Input, Software Return and Mixer Master faders to 0. Output from your audio software should now be displayed in the Software Return meters and audible at ONE’s output.

5.    After configuring ONE’s inputs, the input signal should be displayed in the Mixer Input meters and audible at ONE’s output.

6.    Use the Mixer’s Input and Software Return faders to establish a balance between the input and playback signals. If you’ve found a good balance but the Mixer Master’s Over indicators light, reduce the Mixer Master fader.

Maestro mixer tab

Symphony I/O instructions to record with the Maestro low latency mixer

Step by Step instructions to record with the Maestro low latency mixer
1. Configure your software application for use with an external low latency mixer. For example , in Logic Pro uncheck the Software Monitoring box (Logic Pro > Preferences > Audio) so that when a track is in record, audio output is muted from Logic. Thus, only audio through the low latency mixer is heard.


1. Set the software application’s mixer output to Out 1-2.
2. In the Maestro Output Routing tab window, assign Mixer 1 to hardware output Line 1/2, Mixer 2 to hardware output Line 3/4.


3. In the Output tab window, assign Headphone 1 to Line 1-2, Headphone 2 to Line 3-4

4. In the Mixer tab window, set the Software Return drop down menu to 1-2 and set both the Software Return and Mixer Master faders to 0.
5. In your software application, play back the session. You should hear playback in headphones connected to Symphony I/O’s HP 1 and HP 2 outputs. Next, create a suitable mix of playback tracks. In this example, both Mixer 1 and 2 are in use, but under many circumstances only one mixer is necessary.
6. Connect the signal to be recorded to Symphony I/O’s Line In 1 – the signal level will appear in the Mixers’ Line 1 meter.
7. Raise the Line 1 fader to create a monitor mix of the input and playback signals.
8. Record!

How can I verify that the buttons on my GiO are transmitting data?

With the GiOConfig application installed you can determine whether the buttons on the GiO are transmitting data. Double-click  and open GiOconfig from the Mac’s Applications folder. Under the Expression pedal curve setting you’ll see a Value: and grey rectangular bar. When pressing a button on the GiO the rectangular bar should turn blue and a Value of 127 displayed. This would indicate that GiO is transmitting MIDI data to the Mac and can be checked with all the buttons of the GiO.

GiOConfig button check

My Apogee Mini Series converter emanates a repetitive clicking upon powering on the device?

This typically indicates an issue or fault with the AC adapter. The specifications of this AC adapter are not unusual and a suitable replacement maybe found at an electronics retailer.

The PSU specs and barrel connector dimensions are as follows:
Output: 12 volts DC 1-2 A (1000-2000 mA), center pin of barrel is positive (+)
2.1mm ID, 5.5mm OD

If you’re unable to source this, a replacement can be purchased from Apogee within North America or an Authorized distributor outside the Continental U.S.

Grounding Noise

The direct-coupled design of USB and Firewire audio interfaces can be susceptible to grounding anomalies that are difficult to discern. This can manifest in a variety of audible ways including hum, artifacts, and noises which can modulate with activity from the mouse, hard drive, wireless network, printer activity, or other functions of the computer.

One way to begin troubleshooting is to monitor the outputs of the audio interface with headphones. If the noise isn’t audible then it’s likely that a grounding issue exists.

If you look at the components of a computer based recording system, grounding noise can emanate from a multitude of sources. A few examples of these sources include:

  • Input (Instrument, line-level device, etc.)
  • Audio cables
  • Audio interface power supply (if applicable)
  • USB/Firewire cable
  • Computer’s AC
  • Attached peripherals/devices
  • Powered monitors or amp

A grounding problem could also be caused by the power, AC circuits, and power plugs of the room, or even the building you are in.

To troubleshoot the issue you’ll want to systematically remove, add or replace components in the system until the device (or devices) introducing the grounding issue has been discovered.

  • Because variables can exist within the same space from one circuit or AC outlet to another. Experiment moving devices around to different AC outlets. The preferred setup in a audio/computer system is for the power to be provided from the same AC circuit/outlet.
  • If a MacBook is being utilized, typically the AC power adapter (Magsafe) includes a  3-prong power cable and 2-prong adapter. Try utilizing the 2-prong adapter (North America). Does running the MacBook on batteries (=floating) solve the problem?
  • Utilize balanced cables (1/4″ TRS or XLR) when possible particularly when the audio interface is equipped with balanced inputs or outputs. Balanced circuitry is less prone to ground loops as the ground does not carry signal.
  • When unbalanced cables (RCA, 1/8″ or 1/4″ TS) are utilized keep the length of the cable to a minimum, under 10 feet (3 m). Longer lengths can amplify and exacerbate grounding noise.
  • Separate AC power wiring from audio cables.
  • Ground lifting the AC of a device may resolve the problem. This should be done with extreme CAUTION, as grounding exists for safety. You’ll want to consult with the manufacturer of the device about the implications of configuring the power in this manner. In North America this can be accomplished cheaply with a 3-prong to 2-prong ground lift adapter attached to the AC plug. In other countries a power strip without a ground may suffice.
  • Depending upon the severity of the issue another product may have to be implemented to resolve it. This could be a DI with a ground lift option (for input sources like a keyboard, guitar, etc.), a transformer based solution like those offered by Jensen and EBTECH, power conditioning or regulating device.

If you have questions, are unable to resolve this or any issue contact Apogee Support for assistance.