180 degrees to the rear while at the position of attention. Horns up: the command for wind players to bring their instruments to playing position (mouthpiece on or near the mouth). Horns thrust: this command for wind players instructs the band to bring their horns to a thrust position where their instruments are perpendicular to the ground and their mouthpieces are level with their eyes. Horns carry: this command for wind players instructs the band to put their instrument under their right arm. Dismissed/Fall out: this command generally releases the band either for the day or for another portion of the rehearsal. To the left flank: this command turns the band 90 degrees sinistrally while marking time. It is not to be executed until the director/drum major shouts the command "hut" or "march." To the right flank: this command turns the band 90 degrees dextrally while marking time. It is not to be executed until the director/drum major shouts the syllable "hut" or "march." To the rear: this command turns the band 180 degrees while marking time. It is not to be executed until the director/drum major shouts the syllable "hut" or "march". Dress center/right/left dress: this command has the band bring their hands together at eye-level and to turn their heads toward the center, right, or left of the block (if one is in the center, one simply puts one's head down). While dressing, the band can adjust the block to have better spacing. No commands other than "Ready front" (sometimes "Eyes front") can be executed while Dressing is in action. Ready front/Eyes front: this command makes a band exit dress center for attention. Cover down: this command tells the band to line up their files and make sure they are straight. Aside from field show and parade, competitions among secondary schools can also have the march off (also concentration block or drill down). This event involves all participants on the field following the commands of the director or a drum major. If a participant makes a mistake, either by execution or wrong timing, then the participant falls out of the field. A winner is crowned when there is only one participant left on the field. Delay Each musician in a marching band creates sound waves. The waves from each musician, traveling at the speed of sound, reach the other musicians, field conductors, and listeners at slightly different times.