Radiussound Posted April 2, 2019 Share Posted April 2, 2019 Hi Logic Users, In Project Settings there is an option to set the sample rate, this option in also available in the Bounce window. If the sample rate khz value in Project Settings is 44.1 khz, and I set the khz in Bounce window to 48 khz. Will the project be bounced to 48 khz or to 44.1? The reason I ask this because I need different version of my track. 1 version 44.1 khz, the other version 48 khz. I have noticed when I change sample rate in Project Settings, all plugins have to re-load. But when I change the sample rate in Bounce window, no plugin has to re-load at the project is bouced instantly. So do the sample rate in Project settings and in Bounce window have to match? Or does the sample rate in Bounce window overrule the sample rate in Project Settings? Thanks. Radiussound Quote Link to comment Share on other sites More sharing options...
fuzzfilth Posted April 2, 2019 Share Posted April 2, 2019 The mix will be bounced at the project's sample rate and then converted to the sample rate in the bounce dialog if it differs from the project's sample rate. It is a file conversion which as a principle should be avoided if possible, but I have not heard any ill effects so far. Perhaps Holger can chime in on this. Quote Link to comment Share on other sites More sharing options...
Eriksimon Posted April 2, 2019 Share Posted April 2, 2019 Hm, maybe a null test would shed some light? Quote Link to comment Share on other sites More sharing options...
fuzzfilth Posted April 2, 2019 Share Posted April 2, 2019 A null test between what ? A 44.1kHz file and a 48kHz file ? One of these would have to be converted once more prior to nulling them. Quote Link to comment Share on other sites More sharing options...
Eriksimon Posted April 2, 2019 Share Posted April 2, 2019 Yeah, that would double up possible artifacts... still, if even then the differences are minimal, it would at least tell me that there is no sufficient issue to worry about. So, I'm doing it. Quote Link to comment Share on other sites More sharing options...
Eriksimon Posted April 2, 2019 Share Posted April 2, 2019 Complete silence between 44.1 kHz bounce and re-converted 48 kHz bounce! Quote Link to comment Share on other sites More sharing options...
crimsonnoise Posted April 2, 2019 Share Posted April 2, 2019 Erik, wow, thanks for the test. Perfect nulling is not what one would expect, as the process is lossy, no? Quote Link to comment Share on other sites More sharing options...
Eriksimon Posted April 2, 2019 Share Posted April 2, 2019 Yeah, I was a bit surprised too - at first I did have some differences, but that was only the bass and a synthsolo - the only tracks I didn't freeze in the testproject. I'm now running it a second time, just to be sure. Quote Link to comment Share on other sites More sharing options...
Eriksimon Posted April 2, 2019 Share Posted April 2, 2019 I stand technically corrected, as I do get what sounds like dithering noise at -84,3 dBFS (in this movie I added 48 dB at the output, to get visuals on the meter). No musical content is audible though. Quote Link to comment Share on other sites More sharing options...
fuzzfilth Posted April 2, 2019 Share Posted April 2, 2019 So we can assume that the actual noise introduced by the SRC is at about -90dBFs. This is certainly good enough for me to not worry about it. Thanks Erik for finding out. Quote Link to comment Share on other sites More sharing options...
Radiussound Posted April 2, 2019 Author Share Posted April 2, 2019 Thanks guys for testing it out. I do not understand the technical aspect of your testing. But what I like to know.. Is it a safe way to have the sample rate in project settings at 44.1khz and bounce as 48khz? Or is there a noticeable loss of quality? Thanks Quote Link to comment Share on other sites More sharing options...
Solution Eriksimon Posted April 2, 2019 Solution Share Posted April 2, 2019 Well, no, there is no noticeable loss - that is what this test shows. So it's fine to bounce at 48 kHz from a 44.1 kHz project - and vice versa. Quote Link to comment Share on other sites More sharing options...
Radiussound Posted April 2, 2019 Author Share Posted April 2, 2019 Thank guys, I mark this topic as solved! Quote Link to comment Share on other sites More sharing options...
fisherking Posted April 2, 2019 Share Posted April 2, 2019 it's threads like this that make these forums the best on the web (and why i visit way too often every day); thanx! Quote Link to comment Share on other sites More sharing options...
crimsonnoise Posted April 2, 2019 Share Posted April 2, 2019 I stand technically corrected, as I do get what sounds like dithering noise at -84,3 dBFS (in this movie I added 48 dB at the output, to get visuals on the meter). No musical content is audible though.Dithering noise +48 dB.gif At 84dBFS that is quite significant though, if a good converter gives us 120dB dynamic range isn't it? That raises noise by 40dB, probably into the audible range, even though it may not be a problem. Thanks so much testing! Quote Link to comment Share on other sites More sharing options...
fuzzfilth Posted April 2, 2019 Share Posted April 2, 2019 120dB, maybe, if it's a very good converter. Add a microphone and a mic preamp, in a "quiet" room, and you're in the range of -80, -75 already, so SRC will not add anything significant to that. Quote Link to comment Share on other sites More sharing options...
crimsonnoise Posted April 5, 2019 Share Posted April 5, 2019 Interesting, I repeated Erik's test, with different results. I don't get any HF noise (did you have dither on while bouncing?), but I get occasional crackles every 3 secs or so. Seems to be related to heavy low frequency transients on the original. The artifacts are more pronounced on a louder track. On the quieter track I don't actually hear anything but the meters show a signal. Probably very high frequency. Louder track: Quieter track: Quote Link to comment Share on other sites More sharing options...
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