SYSEX_START
if (x->start != SYSEX_START)
if (dev_mst == SYSEX_START) {
if (dev_midx == 0 && dev_mst != SYSEX_START)
x.start = SYSEX_START;
x.start = SYSEX_START;
if (iep->st == SYSEX_START) {
if (iep->idx == 0 && iep->st != SYSEX_START)
if (x->start != SYSEX_START)
x.start = SYSEX_START;
x.start = SYSEX_START;