пт, 19 апр. 2019 г. в 14:13, Tanu Kaskinen <tanuk@xxxxxx>: > If the plugin gets the number of bands during the > initialization, it can create the appropriate number of non-array > control ports. Interleaved audio ports aren't needed either, because > PulseAudio can do the deinterleaving before passing the audio to the > plugin (like module-ladspa-sink already does). If one's going to write > an LV2 plugin, it's best to use standard port types so that all hosts > will be able to use the plugin. In addition, I think that "if the plugin gets the number of bands [at runtime]" is a very big "if" for an IIR-based equalizer. So big that I would rather hard-code it, or treat equalizers with a different number of bands as completely different plugins. The reason is that the required slope of inter-band transition (i.e., effectively, the filter order) is a function of the width of each band. Implement a filter with a too-low order, and it won't be able to isolate (and thus control thegain of) a frequency band selectively enough. Implement a filter with a too-high order, and its frequency response will be too steppy. Besides, consumer electronic devices (TVs, HDMI receivers, Hi-Fi amplifiers) just do not have equalizers with a variable number of bands, for usability reasons. I don't see a reason for PulseAudio to be different. -- Alexander E. Patrakov _______________________________________________ pulseaudio-discuss mailing list pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
