How to choose a transistor for amplification
Simple amplification of audio is the most trivial demand for a BJT and virtually any transistor (including germanium) will do the job you want. Maybe look for BJTs that are referenced as good audio amplifiers but, given that the marketing boys would see some folk being put off buying a particular transistor because it is pigeon-holed by the label.

The level of audio does not need to be greater than 0.6 volts because the right BJT amplifier will set its bias point to accommodate all the + and - swings of the audio signal it wishes to amplify.