The 9088iis Networked Signal Processor forms the heart of the Soundweb system. In a single rack space unit, it offers 8 analogue audio inputs, 8 analogue audio outputs, 200 MIPS of digital signal processing, a pair of network jacks, and a variety of control options.
The front panel of the 9088iis has a number of LEDs to allow a quick view of activity on the audio inputs and on the network. It also has a mini-DIN connector for an RS-232 serial port: this is normally used to connect a PC for system setup and control.
The rear panel contains the audio inputs and outputs and the network jacks. It also contains a second RS-232 port, which is normally used for control from an external controller such as AMX or Crestron. Finally, it contains a control connector: see section 4 Control options for a description of how this is used. Both control i/o and analogue i/o connections are made via "Phoenix" style two-part screw terminals; the female connectors are shipped with the Soundweb unit, so installation can be made with no soldering and no extra connectors to buy.
The 9088iis contains two preamplifier cards for the analogue inputs: each card handles four of, the inputs. Three types of card are available: the analogue line card, the analogue mic/line card and an AES/EBU Digital Input/Output card.
The line card gives a choice of two gain settings: 0 dB and 12 dB (intended as a pro/consumer switch). The mic/line card provides a range of gain settings from 0 dB to 72 dB, together with phantom power and phase reverse. In all Cases, each input can be switched individually.
The Digital input card holds two AES/EBU stereo inputs and outputs, with input sample rates from 32kHz to 96Khz. Output sample rates are user-selectable from 44.1kHz, 48kHz, 88.2kHz and 96kHz, and an external word-clock sync input is provided for house-reference.
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Used Processor Units
Processor units, often simply known as a DSP audio processor, are a sound-processing device that alters the sound of auditory signals. The processing of the audio signals may be either digital or analog. The analog processing involves the direct operation of the electrical signal while the digital processing involves the mathematical operation on the digital representation of the audio signal.
The audio signals are typically known as sound waves that are transmitted through the air. These sound waves are measured in decibels or bels. These audio signals need processor units especially in radio broadcasting because the processor units link the transmitter with the rest of the sound system devices. There are various methods involved in the processing of both analog and digital signals. These include the following: storage, compression, transmission, equalization, noise cancellation, enhancement, level compression, echo, filtering and many more.
Analog processing is the physical alteration of the uninterrupted signal by modifying the voltage, the current or the charge with the use of electrical means. In earlier times, analog processing was the only method being used to modify signals before digital technology came into existence. With the evolution of computers and software, digital sound processing became the alternative to analog processing. The digital processor units use digital circuits like the microprocessors and computers to process audio signals. Digital processing deals with sound waves represented by binary numbers and deals with the sequence of these numbers. Nowadays, audio systems typically use the digital processing method because it is more powerful and proficient compared to analog signal processing.
