Apogee ONE - Troubleshooting

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ONE by APOGEE – User’s Guide
Troubleshooting
Symptom - There’s no signal at ONE’s output.
Solution -
• Verify that the System Preferences Sound windows are
congured as described on page xx.
• Press ONE’s top panel encoder until the icon LED is lit, and turn
the encoder clockwise.
• If the icon LED is blinking, press and hold the encoder until the
icon lights solidly.
• If there’s no output after checking the items above, open Audio
MIDI Setup, set Properties For to ONE, and toggle the sample
rate (labelled as Format) from one setting to the other and back.
Symptom - The input connected to ONE isn’t getting to my audio
application
Solution -
• Verify that the input to which you’ve connected the source is
active.
• See pages xx-xx for information about conguring your audio
application for use with ONE.
• Increase the input gain until level is visible on the top panel
meters.
Symptom - When recording, the input is delayed in my headphones
Solution -
• Decrease the I/O buffer size in your audio application. See page
xx for more information about setting the I/O buffer.
• Use Maestro’s low latency mixer, as described on pages xx-xx.
Symptom - I hear clicks and pops when recording or playing back
from my DAW.
Solution - Problems with clicks and pops usually indicates that the
I/O buffer in your DAW(audio application) is set too low. Please see
page xx for more information about setting the I/O buffer.
Symptom - The meters in Maestro doesn’t match ONE’s top panel
meters.
Solution - The meters on ONE’s top panel and in Apogee Maestro
display the signal at different points in the signal path.
• When the encoder is set to an input, the top panel meter displays
the analog signal after input gain has been applied but before
conversion of the signal from analog to digital. The Input meters
in Maestro display the signal after conversion from analog to
digital.
• When the encoder is set to the output, the top panel meter
displays the analog signal after the output level. This means that
as the listening level is decreased, the level displayed on the top
panel meters decreases as well. The Output meters in Maestro
display the signal before the conversion from digital to analog.
• The top panel meter’s red LED only lights when the input level
is displayed. To check for digital overs on the output, check
Maestro’s output meters. If an over occurs, reduce the output
level of your audio application.
Symptom - When connecting speakers to ONE, there is hum and/or
buzz at the output.
Solution - In most cases, a steady hum or buzz at the output is
caused by grounding issues between ONE 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 conguration of the connected equipment must be
modied. This may be done by connecting a ground lift adaptor to
the equipment’s AC connector to disconnect (or “lift”) the AC ground
prong.
Some experimmentation may be required to nd the grounding
conguration that results in the lowest noise. It may be useful
to disconnect all equipment except ONE, the Mac and a pair of
headphones, and then connect additional equipment one piece at a
time.