Al Krow Posted August 30, 2021 Share Posted August 30, 2021 (edited) On 30/08/2021 at 18:39, LukeFRC said: We’re presuming that YouTube’s compression is rendering the audio as it was uploaded … True - but compressing a sine wave will change the amplitude (volume) but shouldn't impact the frequencies (i.e. the pitch)? I mean YT clips generally don't sound out of tune or pitch-shifted compared to a Spotify recording. I'm sure someone will be along shortly to correct me if I've got that wrong. Besides, I was adjusting for amplitude in any case by altering the volume as I was going along. Edited August 31, 2021 by Al Krow Quote Link to comment Share on other sites More sharing options...
Jack Posted August 30, 2021 Share Posted August 30, 2021 There are free signal generator apps for phones... Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 30, 2021 Share Posted August 30, 2021 5 hours ago, Al Krow said: SM - what we should both consider doing do is to play that YT clip through our bass cabs (BB2 and GR 212 Slim respectively). Be interesting to see how much low end comes through and where the cabs top out and I'll also A/B it with RCF 310A and maybe @jrixn1 could do the same with his 732As? Could have a go, but it will be subjective. The at212 gets 'flabby' by the time you get down to a low b but reproduces it. Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 30, 2021 Share Posted August 30, 2021 I have a proper signal generator, but its in a shipping container... Quote Link to comment Share on other sites More sharing options...
barkin Posted August 31, 2021 Share Posted August 31, 2021 17 hours ago, Al Krow said: True - but compressing a sine wave will change the amplitude (volume) but shouldn't impact the frequencies (i.e. the pitch)? I mean YT clips generally don't sound out of tune or pitch-shifted compared to a Spotify recording. I'm sure someone will be along shortly to correct me if I've got that wrong. Besides, I was adjusting for amplitude in any case by altering the volume as I was going along anyway. I reckon he's talking about lossy audio compression, not dynamic range compression. Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 31, 2021 Share Posted August 31, 2021 Most typical MP3 compression used for the web has a 'brick wall' rolloff at 16Khz, and this almost certainly applies to YouTube videos. Quote Link to comment Share on other sites More sharing options...
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