Analyzer; State Overview - RME Audio ADI-2 Pro User Manual

15.2 Analyzer

The Analyzer is one of the main features of the ADI-2 Pro. Thanks to the high-resolution IPS
panel even smallest details are clear to see. Music content analysis is possible even when
viewed from a greater distance.
The Analyzer is based on RME's famous Spectral Analyzer in DIGICheck. It uses 29 biquad
bandpass filters for high separation between the bands, providing outstanding musical visuali-
zation. Using carefully selected attack and release times the display is responsive, but still easy
to read. On top it uses RME's own Max LR technique to prevent 6 dB higher level display for
monaural signals, and zero display with out–of-phase signals.
The Analyzer operates at any sample rate, and even with
DSD. There are no parameters to change, and the shown
frequency range is always the human audible range, 0 up
to 20 kHz.
To be able to also show DC content the lowest band is not
a band-pass filter, but a low pass, catching the whole
range from 0 Hz up to 20 Hz. With some unusual signals it
therefore can happen that the level shown will be a bit
higher than expected.
As opposed to most other solutions no FFT (Fast Fourier Transform) is used. RME's Spectral
Analyzer performs a true band-pass filter calculation, as in professional hardware devices. The
frequency distance between the filters is scaled matching human hearing. The highly optimized
code allows to run a 30 band analyzer with 60 dB range, sharp filters and 0.5 dB steps accuracy
per band, on the ADI-2 Pro DSP, even at 768 kHz sample rate.
The most important application using a Spectral Analyzer is the visualization of frequencies and
levels found in music or speech. The Analyzer shows levels and frequencies even at the edge
of the human ear's abilities – or that of the used speakers and headphone. The visual display
helps to train ones ears, makes coarse errors visible, and shows what sometimes might stay
unnoticed. For example many speakers won't let you hear frequencies below 30 Hz. Simply
look on the Analyzer to see what's going on in the underground.

15.3 State Overview

The State Overview screen is a typical RME feature. Since 20 years we prefer to give our cus-
tomers more information at hand than just 'something there'. The Settings dialogs of our audio
interfaces include detailed Input Status analysis to simplify setup and ease trouble-shooting.
Additionally RME provides a free tool with any audio interface, DIGICheck, which analyzes lev-
els, Channel Status and bit stream content, the true hardware sample rate and much more.
When the ADI-2 Pro is connected but no sound can be
heard then RME's analysis tools come to the rescue. The
State Overview screen is there to track down the problem in
an easy to understand and efficient way. Although it might
look simple (fully intentional!), it includes detailed analysis
that outperforms any other similar device.
Shown are the current states of the digital inputs SPDIF
optical and coaxial, AES, USB connection and the audio
transmitted, and the SRC. The current Clock source is
mentioned in full length, although this information is found
abbreviated in the status bar at the bottom.
User's Guide ADI-2 Pro © RME
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