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<h1>Crossover</h1> <div class="level1"> <p> <img src="/acourate-wiki/lib/exe/fetch.php?media=bilder_funktionen:gen_crossover.png" class="media" alt="" /> </p> <p> <b>Description:</b> <br/> This function creates digital crossovers for active multi-way loudspeakers. </p> <p> <br/> <b>Options:</b> </p> <p> 1. Input fields for crossover frequencies of the individual drivers, together with desired delays of each driver relative to the lowest frequency driver. If a driver is required to be moved earlier to match the lowest frequency driver, the "delay" may be negative. </p> <p> <br/> 2. There are several types of crossovers available: </p> <p> - Butterworth / Linkwitz find their counterparts with analog filters, although unlike their analog counterparts may be made linear phase.<br/> - Neville Thiele: Provides a steep separation with a slightly sloping top, whereby undesired frequencies are very well suppressed.<br/> - Bessel: These filters have the shortest ringing, which allows the step response to be highly optimized. </p> <p> A companion function recently introduced allows the creation of Horbach-Keele crossovers (speakers must be designed with this crossover in mind, or at least fit its requirements by lucky accident) which provide nearly constant vertical dispersion of sound over a broad range of frequencies. </p> <p> <br/> 3. Selection of linear or minimum phase<br/> 4. Filter length (Higher values ​​result in longer, more accurate filtering with longer latency and higher CPU utilization. Recommendation: 44.1kHz-48kHz: 65536 taps, 88.2-96kHz: 131072 taps, 176.4-192kHz: 262144, 352.8 - 384kHz: 524288 - note that very long filter lengths with multiple crossover frequencies can put extreme demands on the convolution computer.)<br/> DelAIlXO: If checked, deletes all linear phase crossover files in the active directory before creating the crossovers to be generated. Does not delete minimum phase crossovers - probably a bug.<br/> 5. Crossover Format (Only if the convolution software used cannot handle .dbl filters, or the .wav files that Acourate can create from them choose single precision .pcm) </p> <p> <b>Use:</b> <br/> Digital crossovers can be superior replacements for analog "hardware" crossovers in active multi-way speakers. They can also be linearized and fully adjusted for time accuracy. Impulse and step response for speakers using such crossovers can approach theoretical limits. </p> <p> <br/> <b>Example:</b> <a href="/acourate-wiki/doku.php?id=en:wiki:anhang:anleitungen:erstellen_digitaler_frequenzweichen" class="wikilink1" title="en:wiki:anhang:anleitungen:erstellen_digitaler_frequenzweichen">Instructions: Creation of Digital Crossovers</a> </p> </div>

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