I’m a newbie here, so hello! I’ve had a lovely time over the last few days looking through past messages and have found most of the answers to my questions without having to ask them. One thing I can’t find though…
I’ve got an Apogee Mic that only works with my phone or iPad, not my computer. That’s okay, it means I can avoid a whole lot of noise issues - no computer fan etc. I have been recording on the iPad in the Twisted Wave app, then dropboxing it to my computer in wav format and editing it in Audacity. My question relates to the fact that when I select a moment of room tone in Twisted Wave, it tells me that the noise floor is about -53dB, but when I analzye it in Audacity, it looks much quieter than that - closer to -65.3dB.
I’ve attached two files 0 the same snippet with a bit of room tone at the start (I edited out the breath just before speaking). Running the ACX check on that, it tells me that the NoiseFloor is -65.8dB, but that it fails to meet RMS levels. (This is the version that, on Twisted Wave on the iPad registers about -53dB.)
The second file is the same snippet, normalized to -3.2dB in Audacity. This version does meet ACX requirements. The NoiseFloor is now -62.4dB.
So the question is, how accurate are both of the two systems? It’s a bit alarming to get such a difference. (I can further lower the noise floor by turning off more appliances, but this version is with the main offenders turned off - computer, fridge, fish tank…).
Thank you for your time!
Miranda