single cassette meaning in English

单磁带盒
单盒磁带
单卡型盒式磁带

Incredibly , even my husband , who strongly objected to my pursuing spiritual practice , recently asked me to record this one song for him over and over again on a single cassette tape , so that he could listen to it continuously , just as i had done earlier
妙的是反对我修行最力的外子，日前也要求我将这首歌反覆录在一卷录音带里，一遍又一遍的聆听，就像我当年一样，难不成顽石也将点头？