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Product Code: Audison Bit One Signal Interface Processor
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Audison Bit One Signal Interface Processor

Bit One is a multi-function digital processor capable of interfacing with any analog and/or digital source, turning any ordinary system into one with very high-level performance.

Despite its compact size, the Bit One is equipped with a powerful DSP (Digital Signal Processor).

Managed and configured by simple and intuitive computer software, it is possible to make adjustments to improve the signal through each phase of its path; from input to output.

A revolutionary technology; making the acoustic domain of your car… truly yours.

Connectivity with no limits Acoustic reproduction begins with traditional sources such as radio, then Compact Disc and now moving on to the use of new devices like MP3 players, streaming mobile phones or other multimedia devices.

Bit One provides the ability to take advantage of these technologies by bringing them all together, making the most of the musical performance. Eight input channels; four different signal typologies (amplified, pre-amplified, coaxial electric and toslink optical digital) connect up to six different sources managed through a remote control, making the Bit One a unique interface suitable for any need. Eight analog and/or digital output channels ensure vast expandability for any audio system configuration.

Listening Freedom The Bit One project was born with the aim of creating a perfect acoustical environment in every vehicle, customizable for every listening position, letting you experience true mobile bliss. Today’s new vehicles are equipped with audio systems which offer very little, if any, upgrade opportunities. The most technologically advanced factory systems feature proprietary functions that are in most cases essential to the vehicle operation, but their sound is generally unsatisfactory. The feature set of the Bit One, along with software designed and developed to control every parameter of the reproduction, provides the ability to integrate into these complex systems.

With the Bit One, the concept of freedom is at your fingertips.

The digital domain The Bit One ushers in a new era of intelligence, where the unlimited calculation ability of the DSP (Digital Signal Processor) is combined with an extremely user-friendly interface. Specifically designed for audio applications, the DSP processes the signal in the digital domain: the management and control of the acoustic reproduction are further improved by the accuracy and speed of the digital system.

Minimal and compact The Bit One combines simple and complex elements: a smooth top surface opposed to sides full of connection possibilities. The perfection of the design and proportions equal the flawless layout of its internal technology.

The DRC provides direct interface with the user: this Digital Remote Control represents the final step in the Bit One’s functionality. Through an ergonomic knob, adjustments can be made rapidly and accurately. A liquid crystal back-lit display provides visual elements to the user. The compact size and the dark grey aluminium finish allow the DRC to seamlessly integrate into any dash layout; adding a touch of originality and technology.

Universal inputs Bit One provides every type of connection for the input sources. Any device with up to 8 amplified hi-level outputs or 6 pre-amplified low-level outputs can be used as the main source. Bit One also provides 5 additional source inputs with 4 different connection types available:

- 2 S/PDIF PCM mode digital inputs, one optical and one coaxial electric;

- 2 RCA type low-level (PRE) inputs, for use with any external source, such as MP3 players or gaming consoles;

- a hi-level (PHONE IN) “momentary audio interrupt” input for use with devices such as cellular phone hands-free kits that provide a "Mute" function.

The eight hi-level inputs can be configured to reconstruct a stereo signal, even when used with filtered outputs used to drive component speakers (tweeter, midrange, woofer, etc.) in factory OEM systems. Thanks to the on-screen instructions provided by the software during the set-up, the Bit One can automatically sum multiple filtered channels and then “flatten” the response curve of the OEM source, and if necessary, can also reconstruct the center and subwoofer channels. By leading the appropriate track on the provided test disc (CD or DVD for multimedia configurations) the DSP reconstructs the full-bandwidth signal, rectifying its frequency response, providing a flat, full range signal.

Outputs The Bit One features eight output channels: either with analog pre-amplified RCA type connections, or in digital mode with the proprietary AD Link connection. The two different modes can also be used simultaneously by associating the outputs within the custom-made software.

The AD Link connection uses a standard CAT 5.S LAN cable terminated with RJ45 connectors to transmit up to eight channels of digital audio to amplifiers equipped with this feature (such as found on the new Audison Thesis TH series). The AC Link is dedicated to the “control” of the system. It is comprised of one connector for the provided DRC (Digital remote Control) and one for the AC Link provided amplifiers in the system.

Bit One provides three different methods for its remote turn on/off, while generating remote out to turn on/off other components in the system:

1) ART™ Automatic Remote Turn On/Off circuit is featured on channel one of the hi-level inputs

2) Delayed “Key” function to turn on/off the system with the keyed ignition function of the vehicle. A “Memory” function is also provided to remember the last known state of the Bit One.

3) Traditional “REM IN” terminal, turning on/off the system with the remote out of a connected source.

Signal Processing The Bit One features a 32 bit floating point “Sharc” series DSP by Analoge Devices, with a 266 MHz clock speed, and Wolfson Microelectronics A/D D/A converters working in PCM at 48 kHz with 24 bit resolution: such an excellent hardware combination enabled the use of accurate and elegant algorithms, improving the quality of sound.

In addition, the speed of the DSP provides the ability for the user to djust all of the available “tuning” functions in “real-time” for immediate results.

Immediate Control The system is controlled by the Digital Remote Control. The DRC, to be installed within easy reach of the user, provides fingertip memories for up to four “tuning” configurations created and saved by the Bit One. Ergonomic buttons enable the user to control the various inputs as well as volume, balance, fader and subwoofer level functions. The DRC also enables remote access to the functions of the Audison Thesis TH series amplifiers present in the system.

Bit One Software The Bit One software is the right “tool” for total control of system parameters. Developed according to specific criteria required by the Car Audio industry, it facilitates direct access to the innumerable signal treatment functions available; providing immediate results, as well as extreme operational accuracy. The Windows-based (Win2000, XP, Vista) Software can be used in two different “working” modes. The Standard mode guarantees straight forward and simplified system management achieving great results with little effort: the guided crossover set-up procedure, according to the functions assigned to the outputs, assists the user in setting up the crossovers and equalization enabling the tuning of any system in just a few “clicks”. With the Expert mode, the software provides the ability to freely access all the parameters for a "fully-custom" tuning experience.

Core Features:

  • Power supply Voltage 11 - 15 VDC
  • Idling current 0.45 A
  • Switched off without DRC <0.5 mA
  • Switched off with DRC <1.8 mA
  • Remote IN voltage 7 - 15 VDC (1.3 mA)
  • Remote OUT voltage (Bit One) 12 VDC (20 mA)
  • Remote OUT voltage (Bit One.1) 12 VDC (130 mA)

Signal stage

  • Distortion - THD @ 1 kHz, 1 VRMS Output 0.002 %
  • Bandwidth @ -3 dB 4.5 - 21k Hz
  • S/N ratio @ A weighted
  • Digital Input 112 dB
  • Master Input 96.5 dB
  • AUX Input 100 dB
  • Channel Separation @ 1 kHz 77 dB
  • Input sensitivity (Pre In) 0.3 - 5 V
  • Input sensitivity (Speaker In) 1.2 - 20 V
  • Input impedance (Pre In) 20 k Ohm
  • Input impedance (Speaker In) 5 k Ohm
  • Max Output Level (RMS) @ 0.1% THD 4 V

Input stage

  • Low level (Pre) Ch1-Ch6, AUX1 L/R, AUX2 L/R
  • High Level (Spk) Ch1-Ch8, Phone IN
  • Digital Coaxial, Optical (S/PDIF Max 48 kHz/24 bit)

Output stage

  • Low level (Pre) Ch1-Ch8
  • Digital ADLink (Ch1-Ch8 S/PDIF)
  • From / To Personal Computer 1 x USB / B (2.0)
  • To Audison Electronics 2 x ACLink control bus
  • Crossover N. 8 (one each output channel)
  • Filter type Full / High Pass / Low Pass / Band Pass
  • Filter mode and slope Linkwitz @ 12 / 24 / 36 / 48 dB
  • Butterworth @ 6 / 12 / 18 / 24 / 30 / 36 / 42 / 48 dB
  • Crossover Frequency 70 steps @ 10 ÷ 20k Hz
  • Phase control 0° / 180°


  • On High Level Inputs (Speaker In) Automatic De-
  • equalisation
  • On AUX Inputs N.4 x Graphic: ±12 dB @ 31 Band, ISO 1/3
  • Oct, 20 - 20k Hz
  • On Outputs N.8 x Graphic: ±12 dB @ 31 Band, ISO 1/3 Oct,
  • 20 - 20k Hz
  • Dynamic Equalisation Self-adjusting System between low
  • and high listening levels

Time Alignment

  • Distance 2.8 - 748 cm / 1.1 - 294.5 inches
  • Delay 0 - 22 ms
  • Step 0.08 ms, 2.8 cm, 1.1 inch

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