06/05/2025
This 'Bit' explained.
Every single voiceover has seen this screen in one guise or another but do you know what it means?
"File Name:" the appellation of the repository on your thinking machine. Duh!
"Sample Rate:" how many 'parts' each second will be divided into. In this case 48,000.
"Channels:" the number of orifices you intend to make noise from. Normally one, expressed as 'Mono'.
"Bit Depth:" the amount of binary digits available for each 'part'.
Multimedia programs are typically 8-bit applications. This signifies that 8-bits equals 1 byte of information.
In this case, 16 bits would mean 2 bytes of information are required for each of the 48,000 samples.
So, every second of your audio requires 96,000 or 96 kilobytes of space.
Change the depth to 24 bit and your audio now requires 144 kilobytes per second.
The practicality of knowing this maths means you can calculate which method will be the most efficient for your audio delivery.
Let's say you get sent a 3 minute script and the client wants a 24bit 48kHz wav emailed back to them pronto!
1 channel x 3 bytes x 48,0000 samples x 180 seconds = approximately 25 megabytes of space.
There's normally a 20 meg limit on email size so you might encounter issues.
Also, text based programs are typically 7-bit applications, so your email will require extra space to package your 8-bit based wav file.
I'd deliver your audio using WeTransfer/Smash/DropBox etc or even OneDrive if you don't like your client much.
you're welcome