The “Dayton Audio DSP Control” DSP-408 audio filter, by “Dayton Audio” is similar to both “Filterstation2” and “apeFilter”. The DSP-408 is, of course, for Android and the previous two are for Apple. DSP-408 uses a combination of a highpass and a lowpass filter that can be set between 20 and 20,000 Hz, has up to eight channels that can be linked together, a mixer, an EQ setting similar to a Peak Def filter, a delay setting, and Bluetooth connectivity. Although I would not recommend using the Bluetooth or the delay settings for the Orion Net Project methods.
The DSP-408 audio filter can be used while listening to audio tracks from Loopify Beta. Below is a video to show YOU how to set up the DSP-408 audio filter. I like to have the majority of MY settings at max and adjust the volume using the host/system volume settings so I can get rid of cognitive dissonance/excess bioelectromagnetism as quick as possible.
– Linkwitz Riley filter – “The best electrical crossover filter is one that maintains the acoustic polar response of a loudspeaker throughout the crossover frequency range as output shifts from one driver to the next. The sum of acoustic lowpass and highpass outputs must have allpass behavior without high Q peaks in the group delay. The highpass filter section must attenuate out-of-band driver terminal voltages at a sufficiently high rate so that cone excursion decreases with decreasing frequency and nonlinear distortion is minimized.”
– Bessel filter – “A Bessel filter is a type of analog linear filter used within RF and other electronic applications that has a maximally flat group or phase delay. This preserves a wave shape of signals within the pass-band.”
– Butterworth filter – “The Butterworth filter topology is widely used in many RF and general filter applications. One of the key features of the Butterworth filter is that it has what is termed a maximally flat response within its pass-band. In fact, the Butterworth filter is often considered as a good all-round form of filter which is adequate for many applications, although it does not provide the sharpest cut-off.”
– Defeat filter – It was very difficult to find a definition of this type of filter. Most applications for this are in vehicle audio systems and used with switches.