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@counivers@mastodon.social  ·  activity timestamp 5 days ago

What is an Allpass filter? Explain ike I'm 5? #filter #nofilter #allpass

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pulusound
pulusound
@ahihi@anticapitalist.party  ·  activity timestamp 5 days ago

@counivers its like a delay but some frequencies get delayed more than others

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Kristoffer Lislegaard
Kristoffer Lislegaard
@lislegaard@sonomu.club  ·  activity timestamp 5 days ago

@ahihi @counivers

that is the best explanation i have seen so far!

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Nielso
Nielso
@nielso@digitalcourage.social  ·  activity timestamp 5 days ago

@lislegaard @ahihi @counivers

Indeed a good simple explanation.

For 6 year old folks: Every EQ introduces a frequency-dependend phase shift on the frequencies it is operating on. An allpass filter does so without attentuating or lowering the frequency in question.

The human ear is unable to detecr this phase shift, yet in some cases it can have an effect.

This does not happen with FFIR filters, but these introduce a general delay on the entire signal.

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pulusound
pulusound
@ahihi@anticapitalist.party  ·  activity timestamp 5 days ago

@lislegaard @counivers it is a bit of an oversimplification but by the time you finish explaining Laplace/Z transforms to someone who is 5 they might be at least 6 or 7 already

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Alison Wilder
Alison Wilder
@alisynthesis@io.waxandleather.com  ·  activity timestamp 5 days ago

@ahihi favorite comment of the day award

@lislegaard @counivers

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Kristoffer Lislegaard
Kristoffer Lislegaard
@lislegaard@sonomu.club  ·  activity timestamp 5 days ago

@ahihi @counivers

haha!

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