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To solve this issue, the mobile division developed a feature called Source Level Adjuster (SLA), which matches volume levels between AM/FM, CD or other sources.
Originally a high-end feature introduced in 1992’s flagship KEX-M900 in-dash cassette receiver, SLA is now found in virtually all Pioneer car audio products.
Pioneer’s home division later unveiled a similar technology, called Auto Level Control (ALC), in its 2008 line of A/V Receivers. ALC produced volume consistency between different content, so consumers don’t have to keep changing their volume levels when a television show goes on commercial break or if they switch from other sources such as their Blu-ray Disc player or video game console.
Achieving Sound Quality through Advanced Technology
In Pioneer’s quest to reproduce sound quality that matches the artist’s original intent, the company has developed many unique and innovative technologies.
Pioneer’s mobile division has been applying the power of digital signal processing (DSP) in the car for almost two decades. Auto EQ and Digital Time Alignment were originally introduced in Pioneer’s Optical Digital Reference (ODR) system in 1993 and has been incorporated into many in-vehicle single CD and audio/video products over the last 17 years. Auto EQ analyzes the system frequency response and adjusts the built-in equalizer to obtain a smooth sound that can be further tailored to the consumer’s tastes. Digital Time Alignment delays the sound produced by each speaker independently, “aligning” the sound to arrive at the listener’s ears in unison.
This is critical to achieving a cohesive sound and a broad stereo effect in the car.
In Pioneer’s quest to create technology for the home that replicates the artist’s original intent, the company partnered with AIR Studios, the legendary recording studio founded by The Beatles’ longtime producer, Sir George Martin. During a decade-long partnership, the companies have developed key audio technologies specifically for the home division’s Elite A/V Receivers.