Rundgången har försvunnit sedan vi ändrade volymen.

Rundgången is the definite form of the noun rundgång.

• rundgång = feedback / audio feedback
• rundgången = the feedback

In Swedish, the definite article is often added as an ending to the noun rather than written as a separate word. So instead of saying the feedback, Swedish says feedback-the.

Here, it refers to a specific feedback problem, so the definite form sounds natural.

In this context, rundgång means audio feedback: the unpleasant looping sound you get when a microphone picks up sound from a speaker and re-amplifies it.

It is a common word in sound and music settings.

Both are common gender nouns in Swedish, and in the singular definite form they usually take -en.

• en rundgång → rundgången
• en volym → volymen

So:

• volym = volume
• volymen = the volume

This is one of the main patterns for Swedish nouns.

Har försvunnit is the present perfect.

It is formed like this:

• har = has/have
• försvunnit = past participle of försvinna = disappear

So har försvunnit means has disappeared.

Swedish uses the present perfect here because the result is relevant now: the feedback is gone now.

Both are possible forms, but they mean slightly different things.

• försvann = disappeared (simple past)
• har försvunnit = has disappeared (present perfect)

In this sentence, har försvunnit focuses on the present result: the feedback is no longer there now.

If you said Rundgången försvann sedan vi ändrade volymen, it would sound more like a narrative past sequence of events. The given sentence emphasizes the current situation.

After sedan meaning since, Swedish often uses a past tense clause to refer to the event that started the situation.

So:

• sedan vi ändrade volymen = since we changed the volume

This works much like English since we changed the volume.

The main clause is in the present perfect (har försvunnit) because it describes the situation/result up to now, while ändrade refers to the earlier event.

Here, sedan means since.

So:

• sedan vi ändrade volymen = since we changed the volume

Be careful: sedan can also mean then/later in other contexts. Its meaning depends on the sentence.

Examples:

• Sedan gick vi hem. = Then/Later we went home.
• Sedan vi flyttade hit... = Since we moved here...

This is normal word order for a subordinate clause.

• sedan introduces the clause
• vi = subject
• ändrade = verb
• volymen = object

So the order is:

sedan + subject + verb + object

Swedish subordinate clauses often keep this straightforward order unless there is a sentence adverb involved.

Because Swedish usually marks definiteness with an ending on the noun.

So instead of:

• the volume

Swedish says:

• volymen

The ending -en already includes the meaning of the.

The infinitive/base form is försvinna, which means to disappear.

Its common forms are:

• försvinna = infinitive
• försvinner = present
• försvann = past
• försvunnit = supine/past participle form used with har

So:

• har försvunnit = has disappeared

It mainly describes a present result that started after a past event.

• Past event: vi ändrade volymen = we changed the volume
• Present result: rundgången har försvunnit = the feedback has disappeared

So the idea is not just that something happened in the past, but that the effect is still true now.

Yes, but the meaning shifts slightly.

• sedan vi ändrade volymen = since we changed the volume
• efter att vi ändrade volymen = after we changed the volume

Sedan highlights that the situation has been true from that point up to now. Efter att just places one event after another in time.

So in this sentence, sedan is better if you want the sense of from then until now.

A rough breakdown is:

• Rundgången = the feedback
• har försvunnit = has disappeared
• sedan = since
• vi = we
• ändrade = changed
• volymen = the volume

So literally:

The feedback has disappeared since we changed the volume.

Natural English would usually be:

The feedback has disappeared since we changed the volume
or more naturally in some contexts:
The feedback has been gone since we changed the volume.