On stage, it is easy see the speaker, but radio usually keeps only two or three characters conversing at a time. Every so often, radio plays will have a speaker call out the name of the character he is addressing. You may find it necessary to add these lines at times for clarity. When selecting scenes for adaptation, keep in mind that radio drama is not merely a play with lots of sound effects . A good radio play is good drama, full of conflict and even action, evoked through dialogue, music and sound effects, in that order.
Sound effects are an important ingredient, but by far, the least important.
Sound effects merely sketch in the action or punctuate dialogue and don t generally provide background in the way sets or locations do in plays and films. Sound effects suggest action, but they can easily be confusing or misinterpreted if relied upon too heavily. Intrusive sound effects will make the dialogue harder to follow. Just the same, sound effects can turn a mere script into a real-time drama as opposed to just a story being told. Sound effects add realism, but should be used sparingly.