Hi, I have found some bugs in MAnalyzer.
1. For a sine wave at 1 kHz and -18 dB FS the MAnalyzer shows me different values:
FFT size 1024, 991 Hz, -7.48 dB
FFT size 2048, 991 Hz, -8.32 dB
FFT size 4096, 998 Hz, -8.97 dB
FFT size 8192, 1011 Hz, -7.44 dB
FFT size 16384, 1011 Hz, -8.44 dB
2. The settings for the window type does not work.
3. The appearance in the settings does not fit. Average and Maximum are reversed.
Some bugs in MAnalyzer
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- KVRist
- 87 posts since 28 Nov, 2012
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MeldaProduction MeldaProduction https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=176122
- KVRAF
- 14325 posts since 15 Mar, 2008 from Czech republic
Hi, thank you:
1) This will almost never work - the magnitudes do not equal to broadband signal, it depends on many parameters, you need to take the spectrum as an alternative to the time-domain signal, in a way unrelated to each other. Also when it comes to frequencies - only frequencies that match exactly a frequency bin will be accurate, otherwise it is always an approximation.
2) True, already fixed, will be released soon
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3) I don't understand - just checked and didn't find anything wrong. Can you tell me more info?
1) This will almost never work - the magnitudes do not equal to broadband signal, it depends on many parameters, you need to take the spectrum as an alternative to the time-domain signal, in a way unrelated to each other. Also when it comes to frequencies - only frequencies that match exactly a frequency bin will be accurate, otherwise it is always an approximation.
2) True, already fixed, will be released soon
3) I don't understand - just checked and didn't find anything wrong. Can you tell me more info?
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- KVRist
- Topic Starter
- 87 posts since 28 Nov, 2012
Thanks for the clarification and thanks for fixing window type! To 3) I mean, the appearance of maximum indicates average and average indicates maximum.
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MeldaProduction MeldaProduction https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=176122
- KVRAF
- 14325 posts since 15 Mar, 2008 from Czech republic
Hmmm, how did you test this? I just checked again and everything seems ok.
