MThd àMTrk ÿQŠ ÿX ÿY ÿ/ MTrk { ÿ ÿ! ÿ ÿ °d °e ±d ±e °f ±f ° @ ± @ °] ±] °[ ±[ À Á ± 9 4 -p€9P €4P €-P 4 -x€4P €-P 4 -x€4P €-P 7 2 +p€7P €2P €+P 2 +x€2P €+P 2 +x€2P €+P < 7 0p€