Internet Audio Processor


The WebCaster offers automatic gain-riding, dynamic range control in three, discrete frequency bands, flexible frequency response equalization, and aggressive bandwidth-protection filtering.

The WebCaster can compensate not only for the obvious and unavoidable system limitations, but also for the marginal performance of most computer sound cards and speaker systems.


  • The slow, “gain-riding” Gated AGC function erases long-term input level variations and corrects loudness differences between diverse program sources.

  • A 3-band Compressor/Equalizer optimizes “spectral density” to yield a more uniform program timbre, improved intelligibility and long-term listenability.

  • A sophisticated Peak Controller tames instantaneous “audio surges” which, unchecked, can cause severe program distortion.

  • The built-in RS-232 control bus allows computer selection of all processing parameters if desired.

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Frequency Response

±1dB, 50Hz–4.9kHz. High-frequency cutoff is fixed by an overshoot-compensated multipole low-pass filter appropriate to Internet audio frequency limitations.


Typically under 1% THD at any PROGRAM DENSITY setting, and at PEAK PROCESSING settings which maintain negligible clipping depth.


Better than 60dB below the fully-limited output level.

Variable Equalization

  • HF: –6dB, –3dB, 0dB (flat), +3dB, +6dB.
  • LF: –6dB, –3dB, 0dB (flat), +3dB, +6dB.


  • PROGRAM DENSITY controls “blending” within the tri-band dynamic range compression section, as well as the compression release characteristic. Eight incremental settings range from a slow, blended (single-band) function to fast, fully-independent 3-band operation.
  • PEAK PROCESSING programs the action and interrelation of the program peak limiter and clipper circuits in eight MIN to MAX increments.


Active-balanced, bridging; accepts nominal program line levels between –15dBu and +15dBu.


Active-balanced, 200-ohm resistive source; delivers 0dBm to +15dBm into 600-ohms.

Remote Control Provision

An RS-232 serial data port (DB9 connector) allows all processing presets to be programmed by an IBM-compatible computer, directly or via modem. Supplied software runs under Microsoft Windows® 95/98.

Power Requirement

105–130VAC or 210–255VAC, 50/60Hz; 15W

Size and Weight

13/4”H x 19”W x 10”D (1U); 10 lbs