Ongeag of ons luister, speel ons die opnamespoor terug.

Ongeag of means regardless of whether.

• ongeag = regardless / irrespective
• of = whether / if, when it introduces a clause like this

So Ongeag of ons luister means Regardless of whether we are listening.

Afrikaans often uses ongeag before a noun phrase too, for example:

• Ongeag die weer = regardless of the weather

But when a full clause follows, of is commonly used.

No. In this sentence, of does not mean or.

Afrikaans of can mean two different things:

• or
  
  • Koffie of tee? = Coffee or tea?
• whether / if
  
  • Ek weet nie of hy kom nie. = I don't know whether he is coming.

In Ongeag of ons luister, it is the second meaning: whether / if.

This is because Afrikaans uses verb-second word order in main clauses.

The sentence begins with the fronted phrase Ongeag of ons luister. After that, the finite verb of the main clause comes immediately:

• Ongeag of ons luister, speel ons ...

If you started directly with the subject, you would get:

• Ons speel die opnamespoor terug.

So the word order changes because something else has been placed first.

Yes. After of meaning whether/if, Afrikaans uses subordinate-clause word order.

In of ons luister, the verb luister comes after the subject ons, and because there is only one verb, it is already at the end of that clause.

That can look quite similar to English, but it is still normal Afrikaans subordinate structure.

Compare:

• Ek weet nie of ons luister nie.
• Ongeag of ons luister, ...

If there were more verbs, the end-position pattern would be easier to see.

Afrikaans usually does not use a separate progressive form like English are listening.

So:

• ons luister can mean we listen
• or we are listening

The exact meaning depends on context.

That is very normal in Afrikaans. The simple present tense often covers both the English simple present and present continuous.

It means play back.

This is a separable verb, much like an English phrasal verb:

• speel terug = play back

In a main clause, the verb and the particle separate:

• Ons speel die opnamespoor terug.

Here:

• speel = play
• terug = back

So the whole idea is play back the recording track.

Because terug is the separable particle belonging to speel terug.

In Afrikaans main clauses, the finite verb appears earlier in the sentence, while the separable particle often goes to the end:

• Hy kom terug. = He comes back.
• Ons speel dit terug. = We play it back.

So terug at the end is exactly what you would expect.

Opnamespoor is a compound noun, and Afrikaans very often writes compounds as one word.

It is made up of:

• opname = recording
• spoor = track

So opnamespoor means recording track or audio track, depending on context.

Writing it as one word is normal Afrikaans spelling.

Die is the definite article, meaning the.

So:

• die opnamespoor = the recording track

Afrikaans uses die for definite nouns very broadly, without changing it for gender the way some other Germanic languages do.

Not necessarily.

If luister has an object, Afrikaans usually uses na:

• Ons luister na die opnamespoor. = We listen to the recording track.

But in your sentence, ons luister is being used without stating what is being listened to. In that case, no na is needed.

So of ons luister simply means whether we are listening.

The comma separates the introductory subordinate phrase from the main clause.

So the structure is:

• Ongeag of ons luister, = introductory part
• speel ons die opnamespoor terug. = main clause

This comma helps show the boundary between the two parts and makes the sentence easier to read.

Yes, many speakers might naturally say Ongeag of ons luister of nie to make the whether or not idea more explicit.

So both of these are understandable:

• Ongeag of ons luister, speel ons die opnamespoor terug.
• Ongeag of ons luister of nie, speel ons die opnamespoor terug.

The version with of nie can sound a little more explicit or complete to English speakers because it matches whether or not more closely.