As an audiobook publisher, I need to understand ACX's technical requirements. Specifically, what are the required audio quality standards for MP3 files, what are the minimum and maximum duration limits for an audiobook, and what is the security policy regarding changes to payment profiles on ACX?
Navigate to the ACX help center at https://help.acx.com/s/. Use the search bar to find information on 'audio submission requirements' and identify the required MP3 file format and bitrate. Use the search bar to find information on 'audiobook duration' or similar terms to identify the minimum and maximum duration limits. Use the search bar to find information on 'payment profiles security' or similar terms to identify the security policy for changes to payment profiles. Synthesize all identified information into a concise answer.
State that the required MP3 file format is 192 kbps or higher CBR. State that the audiobook must be a minimum of 5 minutes and a maximum of 100 hours. State that any changes to payment profiles must be made within 15 minutes of signing in to the account.