DTS TruVolume™ for Automotive

DTS TruVolume™ is an intelligent approach to eliminating disparities in volume levels.

By employing an advanced algorithm that models the way our ears and brain perceive loudness, DTS TruVolume allows the consumer to set the desired volume once to enjoy CDs, DVDs, Satellite and Terrestrial Digital Radio, AM/FM radio, incoming Bluetooth calls, etc, without distracting fluctuations in the volume level which are common in today’s in-vehicle environments. TruVolume will ensure the consumer’s desired volume level is maintained consistently without producing undesirable artifacts. The result is a natural-sounding, superior audio experience with clear dialog and no listener fatigue.

DTS TruVolume Benefits:

  • Set desired volume level once to enjoy CDs, DVDs, Satellite and Terrestrial Digital Radio, AM/FM radio, incoming Bluetooth calls, etc. free of annoying volume fluctuations.
  • Intelligent multi-band monitoring/analysis for consistent volume in natural listening experience.
  • No pumping & artifacts associated with traditional AGCs.
  • Industry’s most resource-efficient algorithm.
DTS TruVolume™

DTS TruVolume™

DTS TruVolume™ for automotive

DTS TruVolume™ for automotive

The Problem:

With the large amount of content sources currently available for today’s in-vehicle environments, the inconsistency in the perceived loudness from source to source increases and has become a cause of annoyance for drivers and passengers worldwide. Moreover, within each source, the audio levels can change dramatically. For instance, the volume difference between MP3 files can be dramatic and commercials tend to be substantially louder than programming in order to capture the viewer’s attention at the expense of abrupt and displeasing changes in audio levels.

Traditional automatic gain controls (AGCs) are simplistic and control the volume level by detecting the input signal level and then adjusting the entire signal. This typically generates undesirable artifacts, such as “breathing” where the noise floor rises and falls drastically along with the signal level and “pumping” where low levels signals are lost. Additionally, traditional AGCs can produce unsatisfactory dialog fluctuations and listener fatigue.

The Solution:

DTS TruVolume is a new approach to automatic gain control systems designed to offer the listener with a consistent and comfortable listening experience regardless of the level changes that occur in the audio material. Unlike traditional approaches to automatic gain control, TruVolume utilizes the psychoacoustic concept of loudness in conjunction with an accurate simulation of the hummer inner ear. As such, TruVolume constantly monitors and adjusts the level of the audio signal, so that its perceived loudness remains consistent.

DTS TruVolume is based on human loudness perception models and multi-band signal analysis. TruVolume doesn’t produce undesirable artifacts, and, most importantly, it maintains the reference volume level, resulting in a superior audio experience with clear dialog and no listener fatigue.


Through the utilization of the psychoacoustical concept of loudness, annoying inconsistencies in volume can be eliminated and the listener allowed to enjoy listening to Satellite Radio, MP3 Files, AM/FM radio and all other content at their chosen volume level without worrying about sudden unintelligible or earsplitting volumes.

TruVolume™: an intelligent approach to eliminating discrepancies in volume

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