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  • DSP FIR
  • Three Sad Bastards Podcast

DSP FIR

April 2025

DSP for Stellar Bookshelf

DSP for the Stellar is implemented in two steps. Cross-over and coarse linearisation is via the Hypex Fusion amplifier's software, and via FIR filters that can be implemented upstream. 

TODO: Add details of Stellar DSP.

DSP for Keystone and Bedrock Speakers

DSP for the Keystone and Bedrock speakers is implemented per driver in the form of:

  • Linear XO
    • Delay
      • Gain
        • Frequency Linearisation
          • Phase Linearisation
            • Linkwitz-Riley Transform (for Woofers and Midwoofers)
              • Baffle Step Compensation (for Midwoofer)
                • Cardioid Magnitude Loss Compensation
                  • Cardioid Delay All Pass Filters

                    TODO: Add detail for Keystone and Bedrock DSP for each of the above.

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