Is it possible to modify pulse schedules in QASM?

Is it possible to modify a pulse schedule of a circuit compiled using QASM? I know this is possible using OpenPulse, but it seems none of the IBM backends support OpenPulse. So is it possible to do this through QASM? This paper gives me the impression that I would only be able to modify the QASM command order, but not the actual pulse schedule. Is this correct?

• I thought ibmq_armonk support openPulse, no? This is their 1 qubit machine. Jan 22 '21 at 19:20