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APC816S acoustic processor


An affordable alternative to fancy cinema acoustic treatments 

compatible to various cinema playback format such as Dolby 5.1/7.1/Atmos/Auro3D 



To bring cinema sound system to a new level of acoustic acoustic fidelity

Cinema, as one of the most intricate multi-channel audio systems presenting complex audio content to large audience area, offers a unique combination of issues. Loudspeakers used behind or above the screen are quite different from those used in the surrounding areas, which puts a great significant on the acoustic calibration technique as the soundtrack relies largely on music and effects flowing seamlessly off the screen into the surrounds.

Bring lifelike

and immersive

listening experience

to your cinema

SineMedia's phase calibration technology provides a revolutionary acoustic solution in a simple and economical way, optimizing the overall audio performance in the cinema and creating a uniquely pristine audio experience.


Using a microphone, a spatial averaged data of the listening area is taken in seconds just with APC’s multipoint measurements. After careful analyze of the data, the APC processor then automatically provides an exclusive acoustic solution with a room response corrected to match your target curve. The result is obvious.

World's first FPGA-based FIR acoustic calibration system


Different than any traditional  DSP processing systems causing more phase problems, the core of SineMedia APC's technology lies in its cutting-edge SineCore audio processing platform with the revolutionary high-order real-time FPGA-based FIR acoustic phase calibration system that rejects the compromise between perfect digital audio algorithms and latency and reproduces the nature of sound by three-dimensional standards of sampling precision, sampling frequency and phase accuracy. 

Aiming towards cinema environment, APC816S is designed to provide a wide and extremely precise stereo image and remarkable acoustic transparency to optimise large space acoustics. It combines an ingenuous design and numerous settings to meet different needs of sound field measuring and calibration for cinemas, auditoriums, theaters, stadiums, etc. to to deliver a uniquely pristine listening experience. 

CLIO measured data capture screen

  • Phase contrast before and after processing: from 50Hz, the phase delay is reduced to less than 36 degrees, the bass phase difference does not exceed 20 degrees, the speaker in any space to become a minimum phase system.

  • Frequency response before and after the treatment: due to the resolution of the speaker phase resonance, the phase shift caused by the frequency divider (400Hz; 2.8Khz) and the reflection problem in the room (93Hz,270Hz), restored the speaker's frequency response in the free acoustic field.

Direct sound energy distribution

  • Before

  • After

Ultra-low I/O latency

Theoretically DSP FIR filter is characterized by a linear phase that adapts to the unique audio requirement - that is, changing the frequency domain without causing phase changes. In real cases, however, Due to DSP inborn performance issues, those FIR filters with over ten thousands taps cannot meet the real-time audio performance requirements due to its long delay, deriving more new phase problems. 


Therefore, for the first time, we have achieved low-latency performance and ensured that the filter runs without new phase delays by introducing high-performance FPGA parallel processing of high-order FIRs.

Everything is done in 10s



Traditional room correction systems is either too complicated or time consuming on setting up and measuring. However, APC's unique algorithm is different from those old-fashioned ways. It identifies the phse degradation simply using a microphone and delivers these problems to its Sonic Crystal software to generate a calibration solution automatically. 


It was designed to be very easy-to-use but also highly precise and without compromise in terms of sound quality and/ flexibility for advanced users. You don't need to be technical, just set up measurement microphone and press the compute button, the system will do all the left work for you. Finally, an elevated standard listening area is reproduced in 10 seconds.

Audio excellence for your cinema experience


  • Remove phase distortions in subwoofers and full-range speakers to acquire deeper and tighter bass

  • Obviously lift the clarity of full-range frequency and perfectly reproduce every detail in superb performance

  • Narrow  acoustic quality gaps between different cinema evironments

  • An affordable alternative to fancy cinema acoustic treatments

  • Compatible to various cinema playback format such as Dolby5.1 / 7.1 / Atmos / Auro3D

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