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Shattered Glass Audio releases Ace - Free Software Emulation of a Classic 1950s Tweed Amp for Mac & Win VST & AU

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Shattered Glass Audio has released Ace, a digital emulation of the 1950s, American, all tube, tweed, 5W amp. For added versatility of the plug-in the developers have added two of the most common amplifier mods:

  • Adjustment of the amount of feedback. Feedback can be continuously adjusted from zero feedback to the original feedback. Reduction of feedback increases the overall gain and harmonic distortion.
  • Addition of grid stopper resistors. This mod makes the sound tighter at higher overdrive/distortion levels by controlling the bias shift due to the grid conduction.


  • Accurate modeling of the whole circuit to capture dynamic interactions between amp stages.
  • Authentic 12AX7 and 6V6GT vacuum tube models.
  • Models of the two most common amp mods.
  • Adjustable strength of the input signal with up to 12 dB boost.
  • Cabinet simulation that can be switched on or off.
  • Selectable 2x, 4x, or 8x oversampling.
  • Simple controls and a conservative CPU usage designed in to make ACE easy to use in live settings as well as for re-amping.

Price: Free. Ace is available for Mac OS X and Windows in VST Plugin and Audio Units formats.

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