[linux-audio-dev] Mx4 updated

Hi! The four way phase/amplitude cross mudulating multichannel realtime polysynthesizer for intel mmx located at http://hem.passagen.se/ja_linux is now updated ... (phew!) Changes: New 2inOne oscillator (see below) Finer frequency resolution Smooth, squared envelope decay Enhanged touch response Gtk2 The new version will load old patches but they will be tuned down by two octaves and have reduced cross-modulation values. Use "mx4 -s" to split the oscillators across seperate windows cheers // Jens M Andreasen PS: Screenshot and text on site is not updated ... Q: What is a "2inOne oscillator"? A: A 2inOne oscillator is an oscillator that calculates two related frequencies for the price of one. Originally intended as a sine table replacement, where two slightly "bumpy" versions of the same oscillator (shifted 60 degrees apart) are averaged to approximate one smooth and round wawe. By simple integer multiplication of one of the components, you get the second oscillator (tuned to a harmonic of the other component) "for free" :-) int sxin(short w) // One half of a pseudo sin() { register short a,b; a = w; b = a; b += (SHRT_MIN); a = (a * b)>>16; // mmx: pmulhw_r2r(mm1, mm0); b >>= 15; /* b equals -1 when 'i' is positive else 0 */ b ^= a; /* Alternating positive/negative halfwawes are in 'b' * Always negative halfwawes are left in 'a' * * If you'd rather keep the squarewawe that was in 'b' * then do .. a ^= b; * .. and return a instead. * */ return b; }