I am looking to record my first audio file for ACX and i see ACX has a list of requirements, including the 4 below. how do I determine if my recording meets these? as the audacity screen shows my recordings all between 1.0 and -1.0.
Each file must measure between -23dB and -18dB RMS.
Put simply, all files must fall within a specific volume range. By keeping all files within this range - not too loud and not too soft - listeners won’t have to constantly adjust the volume of their playback device.
Each file must have peak values no higher than -3dB.
By leaving this headroom you’ll reduce the possibility of distortion, which can reduce the quality of the listening experience. This headroom is also needed to ensure files are successfully encoded.
Each file must have a noise floor no higher than -60dB RMS.
Noisy files that contain background sounds and other distractions make it difficult for listeners to focus on the material.
Each file must be 192kbps or higher 44.1kHz MP3, Constant Bit Rate (CBR).
Before going on sale in the Audible store, titles are encoded in a variety of formats that customers have the option of downloading. 192kbps (or higher), Constant Bit Rate MP3 files are required so this encoding process works without error. You may upload 256kbps or 320kbps files if you’d like, but the difference in quality heard by listeners will be negligible. Please see our tutorial for creating MP3s to our spec if this work is unfamiliar to you.
Yes. Noise the hard one for home readers. In English, your background noise has to be a thousand times quieter than your voice. It’s not unusual for your laptop fan to be louder than that.
Those are the hardware restrictions generally tested by a robot, but after you pass that, you also have to pass Human Quality Control. That’s when an actual person listens to your work to make sure you can read out loud in a pleasant manner, and without tongue-ticks, lip smacks, and other mouth problems.
As of the sickness there are two other hurdles. ACX will no longer accept an “audition” or short reading to make sure you’re on the right track, and your work has to be available for me to buy on Amazon before you submit.
You can’t read a cookbook.
This is a posting of the kinds of works they will not accept (scroll down).
i read this master process article but i still dont see how you set the Bit Rate for my recordings - for example, how do I ensure Constant Bit Rate (versus VBR) and ensure Bit Rate is 192kbs or higher.