Learn Russian: Мой брат часто слушает подкасты или аудио, работая. - My brother often listens to podcasts or audio while working.

работая is an imperfective verbal adverb. It is formed by taking the present tense 'they' form of the verb работать (работают), dropping the last two letters, and adding -я. It translates to 'while working' and shows that this action happens at the same time as the main verb (слушает).

Why is there a comma before работая?

In Russian, single verbal adverbs and the larger phrases they form must always be separated from the rest of the sentence by commas. Since работая is at the very end of the sentence, it gets a comma right before it.

Can I use работая if someone else is doing the working?

No. A strict rule for verbal adverbs in Russian is that they must share the same subject as the main verb. Here, мой брат (my brother) is both the one listening (слушает) and the one working (работая). If someone else were working, you would need a different structure, like using пока (while).

Why doesn't the word аудио change its ending here?

аудио is a borrowed foreign word in Russian. Like many borrowed nouns ending in a vowel (such as метро or кафе), it is indeclinable. It stays exactly the same in all grammatical cases, even though it acts as a direct object in the accusative case here.