I’ve just tested a μ-law file exported from Audacity.
Here’s the analysis:
General
Complete name : untitled.wav
Format : Wave
File size : 234 KiB
Duration : 30 s 0 ms
Overall bit rate mode : Constant
Overall bit rate : 64.0 kb/s
Audio
Format : ADPCM
Format profile : U-Law
Codec ID : 7
Codec ID/Hint : CCITT
Duration : 30 s 0 ms
Bit rate mode : Constant
Bit rate : 64.0 kb/s
Channel(s) : 1 channel
Sampling rate : 8 000 Hz
Bit depth : 8 bits
Stream size : 234 KiB (100%)
Hi. I am on Audacity 3.0. I recorded an IVR and was told to just submit as a .wav file. I’m new so didn’t know what to ask so edited the audio and it was set at my normal 44100 Hz and 16 bit. They loaded the audio and when I dialed the phone number to hear my recording the quality was poor and didn’t match the quality I submitted. I inquired and they said they had to change it to 8000Hz to work with their system. So after research I see something called U-Law that appears to need 800Hz and 8 bit.
So I’m in need of an expert to assist with what to do. If I record in 44100 Hz and 16 bit is it possible to save that file in 8000Hz and 8 Bit or do I need to set up Audacity in advance at 8000 Hz and 8 Bit and re-record it? If I can literally resave it at 8000Hz and 8 Bit I don’t see how to do that.
Does anyone know what exact questions I need to ask the client about their system in order to ensure I save the recording and set it properly?