FIELD: audio-signal broadcast systems. SUBSTANCE: proposed system 100 wherein main radio signal is conveyed by transmitting subsystem 120 and received by receiving subsystem 140 has audio-signal source 110 whose output 112 is connected to modulator 160 for modulating high-frequency signal 164 that arrives at transmitting antenna 172. Second output 114 of audiosignal source 110 is connected to delay circuit 116 to introduce desired time delay in audio signal. Delayed audio signal arrives at modulator 164 for modulating high-frequency signal 162 which also goes to transmitting antenna 172. Receiving subsystem 140 functions to receive both main radio signal and delayed backup one and to pass each of them to respective demodulator 180, 182. Demodulator 180 includes circuit 181 that functions to estimate the degree of worsening of main radio signal quality and to transfer quality evaluating signal 186 to mixing control circuit 190. Main audio signal extracted from demodulator 180 arrives at second delay circuit 184 actually equal in delay time to audio-signal delay circuit 116; signal produced by delay circuit 116 and backup audio signal generated by demodulator 182 are passed to mixing subsystem 135 affording stepless transfer from main audio signal to delayed one. Each of them is integrated with respective weighting coefficient whereupon they are grouped to form composite audio signal arriving at audio-signal output circuit 150. EFFECT: enhanced efficiency of smoothing down periodic audiosignal interrupts. 48 cl, 12 dwg
