Morphing Control (Mid- To High- Volume Tuning) - Texas Instruments PurePath TAS5766M User Manual

4.2.2 Morphing Control (Mid- to High- Volume Tuning)

Morphing determines the headroom
dependent balance between Bass
Enhancement and Harmonic Bass
Alignment. As excursion and thermal
headroom drops with increase in
music loudness, the Morphing
feature gradually and dynamically
reduces bass.
Depending on Speed and Harmonic
Alignment settings, some residue of
bass harmonics might remain in the
frequency spectrum creating a
psychoacoustic bass enhancement
effect.
•
Audible artifacts indicate too
high Morphing setting.
•
Little but clean bass could
indicate that the Morphing
setting is too low.
This is an iterative process! It is important to listen to different types of music
and at several volume settings (listening levels).
Morphing Speed (Optional)
The Morphing Speed control determines the aggressiveness on which the Smart Amp
algorithm adapts to a change of headroom.
Speakers react very differently to morphing speed and there is unfortunately no universal
guideline for how to tune this for best setting. It is recommended to experiment. This setting
may also be left at the default value (0).
•
Listen to different music types at moderate to high volume levels.
•
Listen for audible artifacts such as:
o Bass region: distortion, especially with high transients (such as a kick drum).
o Mid/high range: distortion, modulation artifacts.
TI Information – Selective Disclosure
From Section
Set MORPHING to -15 dB
LISTENING TEST
(adjust input vol up/down)
To Section
NOTE:
PurePath™ Smart Amp User Manual (TAS5766M/68M)
4.2.1
yes
Set morphing
Artifacts?
HIGHER
no
yes
Set morphing
No Bass?
LOWER
no
Re-tune Bass
no
Good? Enhancement
Section
yes
4.2.3
SLOU
4.2.1
21