HARMONY H224 AUDIO INTERFACE OWNER’S MANUAL
9
TOP PANEL FUNCTIONS
A. Input Meters: The H224 has six (6) segment LED meters for monitoring your input signals, on each input
channel. The LED meters for input show the input level of the pre-amplifiers’ before the signal is transmitted to
your recording software. The red ‘0dB’, or ‘Clipping’ LED will illuminate when your input signal reaches 0d BFS.
At this level, the signal will begin to overload the analog-to-digital converters and exhibit signs of clipping and
distortion. Use the gain controls or PAD to help keep the signal below the “0dB” level.
B. Power LED: This light indicates if your H224 hardware is correctly receiving power from the host computer.
C. Input Gain Control: These knobs provide 60dB of variable gain (0db to +60dB for microphones, -25db to
+35dB for Line Level).
D. PAD Switch: PAD switches provide attenuation (reduction) of the audio signal being passed through the
NXS Mic/Line preamplifiers. The PAD switches reduce the incoming signal by -10dB before transmitted to the
Analog-to-Digital converter (ADC). This may be helpful in recording situations where the sound source is very
loud and needs to be reduced to avoid clipping of the signal or reducing distortion.
Technical Note:
The PAD switches on the H224 preamplifiers have been carefully engineered to not compromise your
signal-to-noise ratio like on traditional PAD circuits. This means when using dynamic processors
like Compressor/Expanders your recorded signal will not have increased noise in the recording like
traditional PAD circuitry.
E. High-Pass Filter Switch: The High-Pass Filter switch allows for low frequency reduction of the incoming
signal as needed. When engaged the High-Pass Filter will reduce the signal by -12dB per octave starting at
100Hz and below.
F. Output Meters: Output Meters: The H224 has two, six (6) segment LED meters for monitoring your playback/
output signals from your computer or digital audio workstation (DAW). These meters display the signal levels
reproduced from your audio recording software (DAW), or from other computer-based applications like digital
music players. These meters have the same range as the input meters and display the signal level of the
recording itself, and is not influenced by the set output volume.
Sterling 20347518 H224 Manual_Rev.indd 9
12/21/20 3:06 PM
