Being new to audiobook creation with ACX, and new to Audacity - I’m trying to nut out what the best way is to set up, or then master, the audio file I create.
Their requirements are fairly straight forward.
Each uploaded file must measure between -23dB and -18dB RMS - how do I set that in Audacity?
Each uploaded file must have a noise floor no higher than -60dB RMS - That’s easy enough.
… quote… “files submitted to ACX should measure between -23dB and -18dB RMS, with peaks hovering around -3dB.”
Now what I have trouble with is statements like these.
Remove low (80hz and lower) and high (16kHz and higher) frequencies by using a high-pass and low-pass filter, respectively. Set the high-pass filter to remove sounds below 80hz, and set the low-pass filter to remove sounds above 16kHz. If available, set the Q to the highest-possible setting for both filters. Usually, that setting is 24dB or 48dB per octave.
Typically, you should normalize your peaks to -6dB.
We recommend using a limiter, if available, instead of a compressor. Compression can achieve similar results, but it may also decrease the dynamic range of your vocal recording if used improperly. To properly utilize limiting on your files, start by setting your limiter’s maximum output to -3dB. Then, turn up the gain on your limiter until you have achieved a loud, clear, and consistent sound. Don’t boost the level too high. Otherwise, you may distort your voice, or bring up the noise floor of your recording too much. Remember: the better your recording and editing, the easier this process will be! If you have not yet read the first and second parts of this blog post series, I strongly recommend you do so. It can greatly reduce the workload involved in mastering your audiobook.
What I need to know, is the steps I need to follow to achieve the above?
Is such a guide for Audacity set out anywhere already? I’d really appreciate any help on this, thanks.